./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN --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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:04:35,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:04:35,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:04:35,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:04:35,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:04:35,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:04:35,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:04:35,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:04:35,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:04:35,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:04:35,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:04:35,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:04:35,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:04:35,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:04:35,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:04:35,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:04:35,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:04:35,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:04:35,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:04:35,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:04:35,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:04:35,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:04:35,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:04:35,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:04:35,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:04:35,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:04:35,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:04:35,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:04:35,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:04:35,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:04:35,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:04:35,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:04:35,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:04:35,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:04:35,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:04:35,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:04:35,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:04:35,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:04:35,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:04:35,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:04:35,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:04:35,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:04:35,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:04:35,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:04:35,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:04:35,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:04:35,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:04:35,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:04:35,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:04:35,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:04:35,877 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:04:35,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:04:35,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:04:35,878 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:04:35,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:04:35,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:04:35,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:04:35,879 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:04:35,879 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:04:35,880 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:04:35,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:04:35,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:04:35,880 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:04:35,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:04:35,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:04:35,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:04:35,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:04:35,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:35,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:04:35,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:04:35,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:04:35,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:04:35,883 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_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2022-11-20 11:04:36,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:04:36,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:04:36,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:04:36,203 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:04:36,204 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:04:36,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-20 11:04:39,302 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:04:39,538 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:04:39,538 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-20 11:04:39,547 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/238addabc/87995f9c1e2e49ea88dc00e28c48e625/FLAG093a20b1c [2022-11-20 11:04:39,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/238addabc/87995f9c1e2e49ea88dc00e28c48e625 [2022-11-20 11:04:39,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:04:39,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:04:39,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:39,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:04:39,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:04:39,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:39" (1/1) ... [2022-11-20 11:04:39,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573be5bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:39, skipping insertion in model container [2022-11-20 11:04:39,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:39" (1/1) ... [2022-11-20 11:04:39,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:04:39,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:39,782 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-20 11:04:39,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:39,803 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 11:04:39,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5df1652f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:39, skipping insertion in model container [2022-11-20 11:04:39,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:39,805 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:04:39,807 INFO L158 Benchmark]: Toolchain (without parser) took 238.90ms. Allocated memory is still 180.4MB. Free memory was 146.4MB in the beginning and 136.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:04:39,807 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 180.4MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:04:39,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.37ms. Allocated memory is still 180.4MB. Free memory was 145.8MB in the beginning and 136.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:04:39,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 180.4MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.37ms. Allocated memory is still 180.4MB. Free memory was 145.8MB in the beginning and 136.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 99]: 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_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN --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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:04:42,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:04:42,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:04:42,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:04:42,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:04:42,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:04:42,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:04:42,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:04:42,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:04:42,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:04:42,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:04:42,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:04:42,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:04:42,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:04:42,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:04:42,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:04:42,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:04:42,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:04:42,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:04:42,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:04:42,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:04:42,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:04:42,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:04:42,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:04:42,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:04:42,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:04:42,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:04:42,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:04:42,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:04:42,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:04:42,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:04:42,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:04:42,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:04:42,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:04:42,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:04:42,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:04:42,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:04:42,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:04:42,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:04:42,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:04:42,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:04:42,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 11:04:42,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:04:42,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:04:42,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:04:42,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:04:42,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:04:42,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:04:42,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:04:42,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:04:42,275 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:04:42,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:04:42,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:04:42,276 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:04:42,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:04:42,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:04:42,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:04:42,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:04:42,278 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:04:42,278 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:04:42,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:04:42,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:04:42,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:04:42,279 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:04:42,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:04:42,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:04:42,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:04:42,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:04:42,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:04:42,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:42,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:04:42,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:04:42,281 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:04:42,281 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:04:42,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:04:42,282 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_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2022-11-20 11:04:42,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:04:42,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:04:42,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:04:42,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:04:42,749 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:04:42,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-20 11:04:45,874 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:04:46,147 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:04:46,148 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-20 11:04:46,156 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/c59f244ec/1d1a16ebae9442ccb41332d04c142920/FLAG2d9bd2fba [2022-11-20 11:04:46,171 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/data/c59f244ec/1d1a16ebae9442ccb41332d04c142920 [2022-11-20 11:04:46,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:04:46,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:04:46,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:46,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:04:46,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:04:46,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5fcbb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46, skipping insertion in model container [2022-11-20 11:04:46,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:04:46,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:46,401 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-20 11:04:46,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:46,446 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:04:46,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:46,478 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-20 11:04:46,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:46,506 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:04:46,548 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-20 11:04:46,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:46,580 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:04:46,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46 WrapperNode [2022-11-20 11:04:46,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:46,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:46,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:04:46,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:04:46,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,649 INFO L138 Inliner]: procedures = 27, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-11-20 11:04:46,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:46,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:04:46,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:04:46,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:04:46,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:04:46,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:04:46,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:04:46,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:04:46,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (1/1) ... [2022-11-20 11:04:46,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:46,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:04:46,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:04:46,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:04:46,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:04:46,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:04:46,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:04:46,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:04:46,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:04:46,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:04:46,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:04:46,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:04:46,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:04:46,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:04:46,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:04:46,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:04:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:04:46,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:04:46,836 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:04:46,998 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:04:47,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:04:47,535 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:04:47,543 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:04:47,544 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:04:47,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:47 BoogieIcfgContainer [2022-11-20 11:04:47,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:04:47,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:04:47,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:04:47,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:04:47,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:04:46" (1/3) ... [2022-11-20 11:04:47,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7127cab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:47, skipping insertion in model container [2022-11-20 11:04:47,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:46" (2/3) ... [2022-11-20 11:04:47,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7127cab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:47, skipping insertion in model container [2022-11-20 11:04:47,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:47" (3/3) ... [2022-11-20 11:04:47,555 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2022-11-20 11:04:47,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:04:47,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-20 11:04:47,575 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:04:47,732 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:04:47,786 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:04:47,819 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-20 11:04:47,824 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-20 11:04:47,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-11-20 11:04:47,959 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-11-20 11:04:47,959 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:04:47,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 188 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-11-20 11:04:47,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-20 11:05:11,226 INFO L134 LiptonReduction]: Checked pairs total: 3342 [2022-11-20 11:05:11,227 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-20 11:05:11,235 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-20 11:05:11,295 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:05:11,320 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;@5691cb0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:05:11,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 11:05:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:11,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:11,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:11,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash 21360, now seen corresponding path program 1 times [2022-11-20 11:05:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:11,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654316577] [2022-11-20 11:05:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:11,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:11,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:11,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 11:05:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:05:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:11,673 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:05:11,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:05:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:11,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:11,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654316577] [2022-11-20 11:05:11,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654316577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:11,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:11,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560529557] [2022-11-20 11:05:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:11,768 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:12,052 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-20 11:05:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 11:05:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:12,086 INFO L225 Difference]: With dead ends: 748 [2022-11-20 11:05:12,086 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 11:05:12,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:12,093 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:12,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 11:05:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-20 11:05:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 616 states have (on average 4.162337662337662) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-20 11:05:12,258 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-11-20 11:05:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-20 11:05:12,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-20 11:05:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:12,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:12,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:12,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:12,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash 21361, now seen corresponding path program 1 times [2022-11-20 11:05:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:12,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318234835] [2022-11-20 11:05:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:12,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:12,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:12,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:12,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 11:05:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:05:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:12,719 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:12,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:12,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:12,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318234835] [2022-11-20 11:05:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318234835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:12,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:12,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:12,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942682412] [2022-11-20 11:05:12,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:12,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:12,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:12,756 INFO L87 Difference]: Start difference. First operand 748 states and 2564 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:13,178 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-11-20 11:05:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 11:05:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:13,192 INFO L225 Difference]: With dead ends: 1494 [2022-11-20 11:05:13,192 INFO L226 Difference]: Without dead ends: 1494 [2022-11-20 11:05:13,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:13,197 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:13,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:05:13,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-20 11:05:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-11-20 11:05:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 748 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-11-20 11:05:13,280 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-11-20 11:05:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:13,280 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-11-20 11:05:13,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-11-20 11:05:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:13,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:13,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:13,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:13,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:13,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 21466, now seen corresponding path program 1 times [2022-11-20 11:05:13,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:13,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777543184] [2022-11-20 11:05:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:13,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:13,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:13,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:13,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 11:05:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:05:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:13,745 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 11:05:13,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 11:05:13,779 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:05:13,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 11:05:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:13,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:13,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:13,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777543184] [2022-11-20 11:05:13,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777543184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:13,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:13,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:13,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674293044] [2022-11-20 11:05:13,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:13,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:13,852 INFO L87 Difference]: Start difference. First operand 749 states and 2568 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:14,014 INFO L93 Difference]: Finished difference Result 749 states and 2567 transitions. [2022-11-20 11:05:14,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:14,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 11:05:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:14,021 INFO L225 Difference]: With dead ends: 749 [2022-11-20 11:05:14,021 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 11:05:14,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:14,023 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:14,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 11:05:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 11:05:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 11:05:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.160453808752026) internal successors, (2567), 748 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2567 transitions. [2022-11-20 11:05:14,080 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2567 transitions. Word has length 2 [2022-11-20 11:05:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:14,080 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2567 transitions. [2022-11-20 11:05:14,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2567 transitions. [2022-11-20 11:05:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:05:14,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:14,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:05:14,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:14,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:14,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash 21467, now seen corresponding path program 1 times [2022-11-20 11:05:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:14,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086692872] [2022-11-20 11:05:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:14,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:14,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:14,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:14,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 11:05:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:05:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:14,467 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 11:05:14,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 11:05:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:14,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:14,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:14,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086692872] [2022-11-20 11:05:14,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086692872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:14,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:14,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143140777] [2022-11-20 11:05:14,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:14,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:14,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:14,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:14,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:14,529 INFO L87 Difference]: Start difference. First operand 749 states and 2567 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:14,702 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-20 11:05:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 11:05:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:14,709 INFO L225 Difference]: With dead ends: 749 [2022-11-20 11:05:14,709 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 11:05:14,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:14,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:14,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 11:05:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 11:05:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 11:05:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-20 11:05:14,769 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-20 11:05:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:14,770 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-20 11:05:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-20 11:05:14,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:05:14,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:14,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:05:14,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:14,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:14,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:14,983 INFO L85 PathProgramCache]: Analyzing trace with hash 664704, now seen corresponding path program 1 times [2022-11-20 11:05:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009536370] [2022-11-20 11:05:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:14,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:14,986 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:14,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 11:05:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:05:15,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:15,200 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:15,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:15,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:15,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009536370] [2022-11-20 11:05:15,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009536370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:15,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:15,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:05:15,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760672977] [2022-11-20 11:05:15,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:15,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:05:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:05:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:15,558 INFO L87 Difference]: Start difference. First operand 749 states and 2566 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) [2022-11-20 11:05:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:16,372 INFO L93 Difference]: Finished difference Result 2240 states and 7694 transitions. [2022-11-20 11:05:16,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:16,373 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 [2022-11-20 11:05:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:16,390 INFO L225 Difference]: With dead ends: 2240 [2022-11-20 11:05:16,390 INFO L226 Difference]: Without dead ends: 2240 [2022-11-20 11:05:16,391 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 [2022-11-20 11:05:16,391 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 279 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:16,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 12 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:05:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2022-11-20 11:05:16,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 752. [2022-11-20 11:05:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.158064516129032) internal successors, (2578), 751 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2578 transitions. [2022-11-20 11:05:16,461 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2578 transitions. Word has length 3 [2022-11-20 11:05:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:16,461 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2578 transitions. [2022-11-20 11:05:16,462 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) [2022-11-20 11:05:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2578 transitions. [2022-11-20 11:05:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:05:16,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:16,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:05:16,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:16,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:16,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash 664809, now seen corresponding path program 1 times [2022-11-20 11:05:16,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:16,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188082802] [2022-11-20 11:05:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:16,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:16,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:16,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 11:05:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:05:16,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:16,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:16,913 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-20 11:05:16,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-20 11:05:16,936 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:05:16,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 11:05:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:17,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:17,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:17,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188082802] [2022-11-20 11:05:17,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188082802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:17,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:17,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:05:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052814312] [2022-11-20 11:05:17,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:05:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:05:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:17,490 INFO L87 Difference]: Start difference. First operand 752 states and 2578 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) [2022-11-20 11:05:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:18,327 INFO L93 Difference]: Finished difference Result 752 states and 2576 transitions. [2022-11-20 11:05:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:05:18,329 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 [2022-11-20 11:05:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:18,334 INFO L225 Difference]: With dead ends: 752 [2022-11-20 11:05:18,334 INFO L226 Difference]: Without dead ends: 752 [2022-11-20 11:05:18,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:18,335 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:18,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 21 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-11-20 11:05:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-20 11:05:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-11-20 11:05:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.15483870967742) internal successors, (2576), 751 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2576 transitions. [2022-11-20 11:05:18,377 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2576 transitions. Word has length 3 [2022-11-20 11:05:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:18,383 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2576 transitions. [2022-11-20 11:05:18,383 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) [2022-11-20 11:05:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2576 transitions. [2022-11-20 11:05:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:05:18,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:18,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:05:18,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:18,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:18,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 664810, now seen corresponding path program 1 times [2022-11-20 11:05:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450523661] [2022-11-20 11:05:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:18,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:18,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:18,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 11:05:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:05:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:18,780 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 11:05:18,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 11:05:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:18,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:18,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450523661] [2022-11-20 11:05:18,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450523661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:18,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:18,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434016158] [2022-11-20 11:05:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:18,870 INFO L87 Difference]: Start difference. First operand 752 states and 2576 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:19,009 INFO L93 Difference]: Finished difference Result 751 states and 2572 transitions. [2022-11-20 11:05:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 11:05:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:19,015 INFO L225 Difference]: With dead ends: 751 [2022-11-20 11:05:19,015 INFO L226 Difference]: Without dead ends: 751 [2022-11-20 11:05:19,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:19,016 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:19,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 11:05:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-20 11:05:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-20 11:05:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 620 states have (on average 4.148387096774194) internal successors, (2572), 750 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2572 transitions. [2022-11-20 11:05:19,053 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2572 transitions. Word has length 3 [2022-11-20 11:05:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:19,053 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2572 transitions. [2022-11-20 11:05:19,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2572 transitions. [2022-11-20 11:05:19,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:05:19,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:19,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:05:19,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:19,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:19,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 20645478, now seen corresponding path program 1 times [2022-11-20 11:05:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276528373] [2022-11-20 11:05:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:19,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:05:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:19,438 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:05:19,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 11:05:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:19,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:19,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:19,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276528373] [2022-11-20 11:05:19,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276528373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:19,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:19,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360534220] [2022-11-20 11:05:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:19,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:19,537 INFO L87 Difference]: Start difference. First operand 751 states and 2572 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:19,662 INFO L93 Difference]: Finished difference Result 754 states and 2582 transitions. [2022-11-20 11:05:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:05:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:19,668 INFO L225 Difference]: With dead ends: 754 [2022-11-20 11:05:19,669 INFO L226 Difference]: Without dead ends: 754 [2022-11-20 11:05:19,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:19,670 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:19,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 11:05:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-20 11:05:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-20 11:05:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 623 states have (on average 4.14446227929374) internal successors, (2582), 753 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2582 transitions. [2022-11-20 11:05:19,709 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2582 transitions. Word has length 4 [2022-11-20 11:05:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:19,710 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2582 transitions. [2022-11-20 11:05:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2582 transitions. [2022-11-20 11:05:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:05:19,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:19,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:05:19,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:19,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:19,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 20645479, now seen corresponding path program 1 times [2022-11-20 11:05:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058593005] [2022-11-20 11:05:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:19,926 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:19,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:20,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:05:20,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,125 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 11:05:20,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 11:05:20,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:05:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:20,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:20,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058593005] [2022-11-20 11:05:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058593005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:20,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:20,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310588969] [2022-11-20 11:05:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:20,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:20,219 INFO L87 Difference]: Start difference. First operand 754 states and 2582 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:20,359 INFO L93 Difference]: Finished difference Result 754 states and 2580 transitions. [2022-11-20 11:05:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:05:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:20,365 INFO L225 Difference]: With dead ends: 754 [2022-11-20 11:05:20,365 INFO L226 Difference]: Without dead ends: 754 [2022-11-20 11:05:20,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:20,366 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:20,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 11:05:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-20 11:05:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-20 11:05:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 623 states have (on average 4.141252006420546) internal successors, (2580), 753 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2580 transitions. [2022-11-20 11:05:20,411 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2580 transitions. Word has length 4 [2022-11-20 11:05:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:20,412 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2580 transitions. [2022-11-20 11:05:20,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2580 transitions. [2022-11-20 11:05:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:20,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:20,413 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 11:05:20,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:20,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:20,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash 638861065, now seen corresponding path program 2 times [2022-11-20 11:05:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:20,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464548476] [2022-11-20 11:05:20,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:20,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:20,627 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:20,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 11:05:20,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:20,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:20,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:05:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:20,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:20,833 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 11:05:20,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 11:05:20,876 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:05:20,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 11:05:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:05:20,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:20,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464548476] [2022-11-20 11:05:20,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464548476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:20,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:20,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563902921] [2022-11-20 11:05:20,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:20,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:20,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:20,999 INFO L87 Difference]: Start difference. First operand 754 states and 2580 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:21,151 INFO L93 Difference]: Finished difference Result 753 states and 2578 transitions. [2022-11-20 11:05:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:21,157 INFO L225 Difference]: With dead ends: 753 [2022-11-20 11:05:21,157 INFO L226 Difference]: Without dead ends: 753 [2022-11-20 11:05:21,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:21,158 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:21,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 11:05:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-20 11:05:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2022-11-20 11:05:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 623 states have (on average 4.138041733547351) internal successors, (2578), 752 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2578 transitions. [2022-11-20 11:05:21,189 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2578 transitions. Word has length 5 [2022-11-20 11:05:21,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:21,189 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 2578 transitions. [2022-11-20 11:05:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2578 transitions. [2022-11-20 11:05:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:21,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:21,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:05:21,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:21,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:21,402 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:21,402 INFO L85 PathProgramCache]: Analyzing trace with hash 638898101, now seen corresponding path program 1 times [2022-11-20 11:05:21,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:21,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752356542] [2022-11-20 11:05:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:21,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:21,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:21,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:21,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 11:05:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:21,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:05:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:21,598 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 11:05:21,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 11:05:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:21,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:21,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:21,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752356542] [2022-11-20 11:05:21,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752356542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:21,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:21,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:21,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733208044] [2022-11-20 11:05:21,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:21,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:21,632 INFO L87 Difference]: Start difference. First operand 753 states and 2578 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:21,787 INFO L93 Difference]: Finished difference Result 723 states and 2493 transitions. [2022-11-20 11:05:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:21,793 INFO L225 Difference]: With dead ends: 723 [2022-11-20 11:05:21,793 INFO L226 Difference]: Without dead ends: 723 [2022-11-20 11:05:21,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:21,794 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:21,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-11-20 11:05:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 723. [2022-11-20 11:05:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 605 states have (on average 4.120661157024793) internal successors, (2493), 722 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2493 transitions. [2022-11-20 11:05:21,831 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2493 transitions. Word has length 5 [2022-11-20 11:05:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:21,832 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 2493 transitions. [2022-11-20 11:05:21,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2493 transitions. [2022-11-20 11:05:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:21,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:21,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:05:21,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:22,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:22,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash 638898102, now seen corresponding path program 1 times [2022-11-20 11:05:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641211691] [2022-11-20 11:05:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:22,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 11:05:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:05:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:22,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:22,299 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 11:05:22,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 11:05:22,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:05:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:22,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:22,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641211691] [2022-11-20 11:05:22,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641211691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:22,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:22,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 11:05:22,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124325128] [2022-11-20 11:05:22,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:05:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:05:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:05:22,801 INFO L87 Difference]: Start difference. First operand 723 states and 2493 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:23,342 INFO L93 Difference]: Finished difference Result 1387 states and 4817 transitions. [2022-11-20 11:05:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:05:23,343 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 [2022-11-20 11:05:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:23,353 INFO L225 Difference]: With dead ends: 1387 [2022-11-20 11:05:23,353 INFO L226 Difference]: Without dead ends: 1387 [2022-11-20 11:05:23,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:05:23,354 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:23,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 24 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 141 Unchecked, 0.5s Time] [2022-11-20 11:05:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-11-20 11:05:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 701. [2022-11-20 11:05:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 592 states have (on average 4.089527027027027) internal successors, (2421), 700 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2421 transitions. [2022-11-20 11:05:23,407 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2421 transitions. Word has length 5 [2022-11-20 11:05:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:23,407 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 2421 transitions. [2022-11-20 11:05:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2421 transitions. [2022-11-20 11:05:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:23,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:23,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:05:23,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:23,620 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash 640004622, now seen corresponding path program 1 times [2022-11-20 11:05:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:23,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915612544] [2022-11-20 11:05:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:23,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:23,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:05:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:23,799 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:05:23,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:05:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:23,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:23,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:23,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915612544] [2022-11-20 11:05:23,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915612544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:23,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341752926] [2022-11-20 11:05:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:05:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:05:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:05:23,834 INFO L87 Difference]: Start difference. First operand 701 states and 2421 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:24,014 INFO L93 Difference]: Finished difference Result 395 states and 1328 transitions. [2022-11-20 11:05:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:05:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:24,018 INFO L225 Difference]: With dead ends: 395 [2022-11-20 11:05:24,018 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 11:05:24,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:24,019 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 11:05:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-20 11:05:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 356 states have (on average 3.730337078651685) internal successors, (1328), 394 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1328 transitions. [2022-11-20 11:05:24,032 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1328 transitions. Word has length 5 [2022-11-20 11:05:24,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:24,033 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1328 transitions. [2022-11-20 11:05:24,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1328 transitions. [2022-11-20 11:05:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:05:24,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:24,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:05:24,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-20 11:05:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:24,245 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:24,245 INFO L85 PathProgramCache]: Analyzing trace with hash 640004623, now seen corresponding path program 1 times [2022-11-20 11:05:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:24,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446417361] [2022-11-20 11:05:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:24,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:24,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:24,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:24,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 11:05:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:05:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:24,464 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:24,465 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 [2022-11-20 11:05:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:24,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:24,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446417361] [2022-11-20 11:05:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446417361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034688611] [2022-11-20 11:05:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:24,564 INFO L87 Difference]: Start difference. First operand 395 states and 1328 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:24,964 INFO L93 Difference]: Finished difference Result 613 states and 2050 transitions. [2022-11-20 11:05:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:05:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 11:05:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:24,969 INFO L225 Difference]: With dead ends: 613 [2022-11-20 11:05:24,969 INFO L226 Difference]: Without dead ends: 613 [2022-11-20 11:05:24,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:05:24,970 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 102 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:24,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 7 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:05:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-20 11:05:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 479. [2022-11-20 11:05:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 440 states have (on average 3.881818181818182) internal successors, (1708), 478 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1708 transitions. [2022-11-20 11:05:24,988 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1708 transitions. Word has length 5 [2022-11-20 11:05:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:24,989 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 1708 transitions. [2022-11-20 11:05:24,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1708 transitions. [2022-11-20 11:05:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:24,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:24,991 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 11:05:25,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:25,202 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1670144207, now seen corresponding path program 2 times [2022-11-20 11:05:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:25,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309963213] [2022-11-20 11:05:25,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:25,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:25,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:25,205 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:25,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 11:05:25,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:25,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:25,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:05:25,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:25,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:25,446 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 [2022-11-20 11:05:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:25,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:26,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309963213] [2022-11-20 11:05:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309963213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:26,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:26,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:05:26,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943253416] [2022-11-20 11:05:26,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:05:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:05:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:05:26,429 INFO L87 Difference]: Start difference. First operand 479 states and 1708 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:31,819 INFO L93 Difference]: Finished difference Result 4658 states and 16831 transitions. [2022-11-20 11:05:31,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:05:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:05:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:31,847 INFO L225 Difference]: With dead ends: 4658 [2022-11-20 11:05:31,847 INFO L226 Difference]: Without dead ends: 4658 [2022-11-20 11:05:31,848 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 [2022-11-20 11:05:31,848 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 920 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:31,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 87 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 11:05:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-11-20 11:05:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 485. [2022-11-20 11:05:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 446 states have (on average 3.8565022421524664) internal successors, (1720), 484 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1720 transitions. [2022-11-20 11:05:31,930 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1720 transitions. Word has length 6 [2022-11-20 11:05:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 1720 transitions. [2022-11-20 11:05:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1720 transitions. [2022-11-20 11:05:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:31,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:31,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:05:31,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:32,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:32,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1634515517, now seen corresponding path program 1 times [2022-11-20 11:05:32,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:32,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747558243] [2022-11-20 11:05:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:32,158 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:32,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 11:05:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:05:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:32,368 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 11:05:32,368 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 [2022-11-20 11:05:32,388 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 120 treesize of output 116 [2022-11-20 11:05:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:32,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:32,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747558243] [2022-11-20 11:05:32,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747558243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:32,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:32,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:32,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760945299] [2022-11-20 11:05:32,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:32,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:32,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:32,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:32,453 INFO L87 Difference]: Start difference. First operand 485 states and 1720 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:32,610 INFO L93 Difference]: Finished difference Result 461 states and 1648 transitions. [2022-11-20 11:05:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:05:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:32,614 INFO L225 Difference]: With dead ends: 461 [2022-11-20 11:05:32,614 INFO L226 Difference]: Without dead ends: 461 [2022-11-20 11:05:32,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:32,615 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:32,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:05:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-20 11:05:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-11-20 11:05:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 428 states have (on average 3.850467289719626) internal successors, (1648), 460 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1648 transitions. [2022-11-20 11:05:32,629 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1648 transitions. Word has length 6 [2022-11-20 11:05:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:32,629 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 1648 transitions. [2022-11-20 11:05:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1648 transitions. [2022-11-20 11:05:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:32,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:32,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:05:32,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:32,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:32,842 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1634515516, now seen corresponding path program 1 times [2022-11-20 11:05:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433299541] [2022-11-20 11:05:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:32,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:32,844 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:32,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 11:05:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:32,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:05:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:33,075 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-20 11:05:33,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-20 11:05:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:33,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:33,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433299541] [2022-11-20 11:05:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433299541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:33,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:33,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414195714] [2022-11-20 11:05:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:33,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:33,103 INFO L87 Difference]: Start difference. First operand 461 states and 1648 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:33,232 INFO L93 Difference]: Finished difference Result 437 states and 1576 transitions. [2022-11-20 11:05:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:05:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:33,235 INFO L225 Difference]: With dead ends: 437 [2022-11-20 11:05:33,235 INFO L226 Difference]: Without dead ends: 437 [2022-11-20 11:05:33,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:33,238 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:33,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-20 11:05:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-20 11:05:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 410 states have (on average 3.84390243902439) internal successors, (1576), 436 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1576 transitions. [2022-11-20 11:05:33,252 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1576 transitions. Word has length 6 [2022-11-20 11:05:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:33,252 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1576 transitions. [2022-11-20 11:05:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1576 transitions. [2022-11-20 11:05:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:05:33,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:33,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:05:33,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:33,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1634688194, now seen corresponding path program 1 times [2022-11-20 11:05:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:33,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732395348] [2022-11-20 11:05:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:33,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:33,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:33,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:33,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:33,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:33,715 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:33,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:33,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:33,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:33,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732395348] [2022-11-20 11:05:33,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732395348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:33,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:33,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:05:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988958611] [2022-11-20 11:05:33,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:33,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:33,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:33,847 INFO L87 Difference]: Start difference. First operand 437 states and 1576 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:34,053 INFO L93 Difference]: Finished difference Result 440 states and 1581 transitions. [2022-11-20 11:05:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:05:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:34,056 INFO L225 Difference]: With dead ends: 440 [2022-11-20 11:05:34,056 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 11:05:34,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:34,057 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:34,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-20 11:05:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 11:05:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-20 11:05:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 413 states have (on average 3.828087167070218) internal successors, (1581), 439 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1581 transitions. [2022-11-20 11:05:34,071 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1581 transitions. Word has length 6 [2022-11-20 11:05:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:34,091 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1581 transitions. [2022-11-20 11:05:34,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1581 transitions. [2022-11-20 11:05:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:05:34,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:34,092 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 11:05:34,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:34,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:34,304 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -234823210, now seen corresponding path program 2 times [2022-11-20 11:05:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:34,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191663083] [2022-11-20 11:05:34,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:34,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:34,306 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:34,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:34,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:34,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:05:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:34,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:34,524 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 11:05:34,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 11:05:34,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:05:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:05:34,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:34,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191663083] [2022-11-20 11:05:34,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191663083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:34,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:34,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:05:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514147922] [2022-11-20 11:05:34,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:34,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:34,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:34,660 INFO L87 Difference]: Start difference. First operand 440 states and 1581 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:34,746 INFO L93 Difference]: Finished difference Result 438 states and 1576 transitions. [2022-11-20 11:05:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:34,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:05:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:34,749 INFO L225 Difference]: With dead ends: 438 [2022-11-20 11:05:34,749 INFO L226 Difference]: Without dead ends: 438 [2022-11-20 11:05:34,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:34,750 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:34,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 11:05:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-20 11:05:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-20 11:05:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 411 states have (on average 3.834549878345499) internal successors, (1576), 437 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1576 transitions. [2022-11-20 11:05:34,764 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1576 transitions. Word has length 7 [2022-11-20 11:05:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:34,764 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 1576 transitions. [2022-11-20 11:05:34,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1576 transitions. [2022-11-20 11:05:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:05:34,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:34,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:34,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:34,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:34,984 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash -199404339, now seen corresponding path program 1 times [2022-11-20 11:05:34,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042882734] [2022-11-20 11:05:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:34,986 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 11:05:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:05:35,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:35,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:35,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:35,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:35,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:35,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042882734] [2022-11-20 11:05:35,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042882734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:35,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:35,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:05:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715473273] [2022-11-20 11:05:35,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:35,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:35,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:35,847 INFO L87 Difference]: Start difference. First operand 438 states and 1576 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 11:05:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:37,246 INFO L93 Difference]: Finished difference Result 902 states and 3240 transitions. [2022-11-20 11:05:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:05:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 [2022-11-20 11:05:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:37,251 INFO L225 Difference]: With dead ends: 902 [2022-11-20 11:05:37,251 INFO L226 Difference]: Without dead ends: 902 [2022-11-20 11:05:37,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:05:37,252 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 391 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:37,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 17 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:05:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-20 11:05:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 666. [2022-11-20 11:05:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 639 states have (on average 4.100156494522691) internal successors, (2620), 665 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) [2022-11-20 11:05:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2620 transitions. [2022-11-20 11:05:37,291 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2620 transitions. Word has length 7 [2022-11-20 11:05:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:37,291 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 2620 transitions. [2022-11-20 11:05:37,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 11:05:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2620 transitions. [2022-11-20 11:05:37,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:05:37,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:37,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:37,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:37,511 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash 869621335, now seen corresponding path program 1 times [2022-11-20 11:05:37,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:37,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939340242] [2022-11-20 11:05:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:37,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:37,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:37,513 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:37,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 11:05:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:37,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:37,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:37,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:37,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:37,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:37,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939340242] [2022-11-20 11:05:37,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939340242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:37,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:37,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538661402] [2022-11-20 11:05:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:37,963 INFO L87 Difference]: Start difference. First operand 666 states and 2620 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:38,115 INFO L93 Difference]: Finished difference Result 668 states and 2629 transitions. [2022-11-20 11:05:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:05:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:38,119 INFO L225 Difference]: With dead ends: 668 [2022-11-20 11:05:38,119 INFO L226 Difference]: Without dead ends: 668 [2022-11-20 11:05:38,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:38,120 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:38,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-20 11:05:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-20 11:05:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2022-11-20 11:05:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 641 states have (on average 4.101404056162247) internal successors, (2629), 667 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2629 transitions. [2022-11-20 11:05:38,141 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2629 transitions. Word has length 7 [2022-11-20 11:05:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:38,141 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 2629 transitions. [2022-11-20 11:05:38,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2629 transitions. [2022-11-20 11:05:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:05:38,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:38,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:38,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:38,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:38,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1188631227, now seen corresponding path program 1 times [2022-11-20 11:05:38,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:38,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [144614854] [2022-11-20 11:05:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:38,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:38,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:38,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 11:05:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:38,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:38,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:38,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:38,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [144614854] [2022-11-20 11:05:38,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [144614854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:38,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:38,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457627837] [2022-11-20 11:05:38,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:38,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:38,838 INFO L87 Difference]: Start difference. First operand 668 states and 2629 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:39,007 INFO L93 Difference]: Finished difference Result 672 states and 2649 transitions. [2022-11-20 11:05:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:39,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:05:39,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:39,011 INFO L225 Difference]: With dead ends: 672 [2022-11-20 11:05:39,012 INFO L226 Difference]: Without dead ends: 672 [2022-11-20 11:05:39,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:39,012 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:39,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:05:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-20 11:05:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2022-11-20 11:05:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 643 states have (on average 4.102643856920684) internal successors, (2638), 669 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2638 transitions. [2022-11-20 11:05:39,032 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2638 transitions. Word has length 8 [2022-11-20 11:05:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 2638 transitions. [2022-11-20 11:05:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2638 transitions. [2022-11-20 11:05:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:05:39,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:39,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:39,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-20 11:05:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:39,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1188632317, now seen corresponding path program 1 times [2022-11-20 11:05:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890251296] [2022-11-20 11:05:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:39,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:39,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:39,247 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:39,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 11:05:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:05:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:39,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:39,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890251296] [2022-11-20 11:05:39,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890251296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:39,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:39,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401804411] [2022-11-20 11:05:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:39,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:39,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:39,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:39,363 INFO L87 Difference]: Start difference. First operand 670 states and 2638 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:39,499 INFO L93 Difference]: Finished difference Result 542 states and 2062 transitions. [2022-11-20 11:05:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:39,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:05:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:39,503 INFO L225 Difference]: With dead ends: 542 [2022-11-20 11:05:39,503 INFO L226 Difference]: Without dead ends: 542 [2022-11-20 11:05:39,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:39,504 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:39,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-20 11:05:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-11-20 11:05:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 523 states have (on average 3.94263862332696) internal successors, (2062), 541 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 2062 transitions. [2022-11-20 11:05:39,521 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 2062 transitions. Word has length 8 [2022-11-20 11:05:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:39,521 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 2062 transitions. [2022-11-20 11:05:39,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 2062 transitions. [2022-11-20 11:05:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:05:39,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:39,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:39,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:39,734 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1188632318, now seen corresponding path program 1 times [2022-11-20 11:05:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241272885] [2022-11-20 11:05:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:39,736 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:39,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 11:05:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:05:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:39,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:39,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241272885] [2022-11-20 11:05:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241272885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:39,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:05:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543529398] [2022-11-20 11:05:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:05:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:05:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:05:39,940 INFO L87 Difference]: Start difference. First operand 542 states and 2062 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) [2022-11-20 11:05:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:40,089 INFO L93 Difference]: Finished difference Result 414 states and 1486 transitions. [2022-11-20 11:05:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:40,089 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 [2022-11-20 11:05:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:40,092 INFO L225 Difference]: With dead ends: 414 [2022-11-20 11:05:40,092 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 11:05:40,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:05:40,093 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:40,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:05:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 11:05:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-20 11:05:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 403 states have (on average 3.6873449131513647) internal successors, (1486), 413 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1486 transitions. [2022-11-20 11:05:40,105 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1486 transitions. Word has length 8 [2022-11-20 11:05:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:40,105 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 1486 transitions. [2022-11-20 11:05:40,106 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) [2022-11-20 11:05:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1486 transitions. [2022-11-20 11:05:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:05:40,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:40,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:40,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:40,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:40,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1188461037, now seen corresponding path program 2 times [2022-11-20 11:05:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:40,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744356771] [2022-11-20 11:05:40,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:40,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:40,322 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:40,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 11:05:40,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:40,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:40,597 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:40,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:40,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:40,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744356771] [2022-11-20 11:05:40,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744356771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:40,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:40,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985888022] [2022-11-20 11:05:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:40,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:40,812 INFO L87 Difference]: Start difference. First operand 414 states and 1486 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:40,976 INFO L93 Difference]: Finished difference Result 416 states and 1495 transitions. [2022-11-20 11:05:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:05:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:40,979 INFO L225 Difference]: With dead ends: 416 [2022-11-20 11:05:40,979 INFO L226 Difference]: Without dead ends: 416 [2022-11-20 11:05:40,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:40,979 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:40,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 11:05:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-20 11:05:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2022-11-20 11:05:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 403 states have (on average 3.6873449131513647) internal successors, (1486), 413 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1486 transitions. [2022-11-20 11:05:40,991 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1486 transitions. Word has length 8 [2022-11-20 11:05:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:40,991 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 1486 transitions. [2022-11-20 11:05:40,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1486 transitions. [2022-11-20 11:05:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:05:40,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:40,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:41,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:41,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:41,204 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1188461409, now seen corresponding path program 1 times [2022-11-20 11:05:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484195769] [2022-11-20 11:05:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:41,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:41,207 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:41,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:41,449 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:41,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:41,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:41,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:41,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484195769] [2022-11-20 11:05:41,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484195769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:41,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:41,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:05:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486026672] [2022-11-20 11:05:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:41,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:41,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:41,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:41,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:41,614 INFO L87 Difference]: Start difference. First operand 414 states and 1486 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:41,791 INFO L93 Difference]: Finished difference Result 420 states and 1505 transitions. [2022-11-20 11:05:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:05:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:41,794 INFO L225 Difference]: With dead ends: 420 [2022-11-20 11:05:41,794 INFO L226 Difference]: Without dead ends: 420 [2022-11-20 11:05:41,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:41,795 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:41,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:05:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-20 11:05:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-11-20 11:05:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 409 states have (on average 3.6797066014669926) internal successors, (1505), 419 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1505 transitions. [2022-11-20 11:05:41,808 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1505 transitions. Word has length 8 [2022-11-20 11:05:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 1505 transitions. [2022-11-20 11:05:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1505 transitions. [2022-11-20 11:05:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:41,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:41,809 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:41,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:42,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:42,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1968003753, now seen corresponding path program 1 times [2022-11-20 11:05:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:42,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311858788] [2022-11-20 11:05:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:42,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:42,023 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:42,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:42,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:42,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:42,292 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 [2022-11-20 11:05:42,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:05:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:42,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:42,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311858788] [2022-11-20 11:05:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311858788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:42,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:42,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 11:05:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526526984] [2022-11-20 11:05:42,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:42,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:05:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:05:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:05:42,869 INFO L87 Difference]: Start difference. First operand 420 states and 1505 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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) [2022-11-20 11:05:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:44,888 INFO L93 Difference]: Finished difference Result 1931 states and 6865 transitions. [2022-11-20 11:05:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:05:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:44,894 INFO L225 Difference]: With dead ends: 1931 [2022-11-20 11:05:44,894 INFO L226 Difference]: Without dead ends: 1931 [2022-11-20 11:05:44,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:05:44,895 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 653 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:44,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 99 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:05:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-11-20 11:05:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 632. [2022-11-20 11:05:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 621 states have (on average 3.5491143317230276) internal successors, (2204), 631 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2204 transitions. [2022-11-20 11:05:44,929 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2204 transitions. Word has length 9 [2022-11-20 11:05:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:44,929 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 2204 transitions. [2022-11-20 11:05:44,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 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) [2022-11-20 11:05:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2204 transitions. [2022-11-20 11:05:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:44,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:44,930 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:44,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:45,142 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1968004962, now seen corresponding path program 1 times [2022-11-20 11:05:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:45,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744532556] [2022-11-20 11:05:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:45,144 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:45,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 11:05:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:05:45,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:45,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:05:45,471 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 11:05:45,474 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 [2022-11-20 11:05:45,503 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 [2022-11-20 11:05:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:46,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:46,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:46,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744532556] [2022-11-20 11:05:46,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744532556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:46,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:46,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:05:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809701620] [2022-11-20 11:05:46,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:05:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:05:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:05:46,670 INFO L87 Difference]: Start difference. First operand 632 states and 2204 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) [2022-11-20 11:05:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:47,779 INFO L93 Difference]: Finished difference Result 1687 states and 5985 transitions. [2022-11-20 11:05:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:05:47,780 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 [2022-11-20 11:05:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:47,785 INFO L225 Difference]: With dead ends: 1687 [2022-11-20 11:05:47,785 INFO L226 Difference]: Without dead ends: 1687 [2022-11-20 11:05:47,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:05:47,786 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 233 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:47,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 49 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 134 Invalid, 0 Unknown, 342 Unchecked, 0.6s Time] [2022-11-20 11:05:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-11-20 11:05:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 627. [2022-11-20 11:05:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 616 states have (on average 3.563311688311688) internal successors, (2195), 626 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 2195 transitions. [2022-11-20 11:05:47,814 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 2195 transitions. Word has length 9 [2022-11-20 11:05:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:47,814 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 2195 transitions. [2022-11-20 11:05:47,815 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) [2022-11-20 11:05:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 2195 transitions. [2022-11-20 11:05:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:47,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:47,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:47,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:48,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:48,028 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1811744048, now seen corresponding path program 1 times [2022-11-20 11:05:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:48,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637716347] [2022-11-20 11:05:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:48,031 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:48,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:05:48,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:48,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:48,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:48,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:49,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:49,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637716347] [2022-11-20 11:05:49,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637716347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:49,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:05:49,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:05:49,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724131683] [2022-11-20 11:05:49,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:49,055 INFO L87 Difference]: Start difference. First operand 627 states and 2195 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) [2022-11-20 11:05:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:49,628 INFO L93 Difference]: Finished difference Result 635 states and 2227 transitions. [2022-11-20 11:05:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:05:49,629 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 [2022-11-20 11:05:49,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:49,630 INFO L225 Difference]: With dead ends: 635 [2022-11-20 11:05:49,630 INFO L226 Difference]: Without dead ends: 635 [2022-11-20 11:05:49,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:05:49,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:49,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 11:05:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-11-20 11:05:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 635. [2022-11-20 11:05:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 624 states have (on average 3.5689102564102564) internal successors, (2227), 634 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2227 transitions. [2022-11-20 11:05:49,649 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2227 transitions. Word has length 9 [2022-11-20 11:05:49,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:49,649 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 2227 transitions. [2022-11-20 11:05:49,650 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) [2022-11-20 11:05:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2227 transitions. [2022-11-20 11:05:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:49,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:49,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:49,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:49,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:49,863 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1807138849, now seen corresponding path program 1 times [2022-11-20 11:05:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:49,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172840375] [2022-11-20 11:05:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:49,865 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:49,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:50,122 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:50,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:50,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:50,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172840375] [2022-11-20 11:05:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172840375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:50,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944018792] [2022-11-20 11:05:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:50,369 INFO L87 Difference]: Start difference. First operand 635 states and 2227 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:50,519 INFO L93 Difference]: Finished difference Result 689 states and 2476 transitions. [2022-11-20 11:05:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:50,523 INFO L225 Difference]: With dead ends: 689 [2022-11-20 11:05:50,523 INFO L226 Difference]: Without dead ends: 689 [2022-11-20 11:05:50,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:50,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:50,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-20 11:05:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-20 11:05:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2022-11-20 11:05:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 678 states have (on average 3.6519174041297937) internal successors, (2476), 688 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2476 transitions. [2022-11-20 11:05:50,543 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2476 transitions. Word has length 9 [2022-11-20 11:05:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:50,544 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 2476 transitions. [2022-11-20 11:05:50,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2476 transitions. [2022-11-20 11:05:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:50,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:50,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:50,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:50,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:50,757 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:50,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1807133827, now seen corresponding path program 1 times [2022-11-20 11:05:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:50,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582996662] [2022-11-20 11:05:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:50,759 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:50,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 11:05:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:51,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:51,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:51,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:51,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582996662] [2022-11-20 11:05:51,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582996662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:51,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:51,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:05:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380738737] [2022-11-20 11:05:51,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:51,181 INFO L87 Difference]: Start difference. First operand 689 states and 2476 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:51,359 INFO L93 Difference]: Finished difference Result 689 states and 2474 transitions. [2022-11-20 11:05:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:51,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:51,362 INFO L225 Difference]: With dead ends: 689 [2022-11-20 11:05:51,362 INFO L226 Difference]: Without dead ends: 689 [2022-11-20 11:05:51,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:51,363 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:51,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:05:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-20 11:05:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2022-11-20 11:05:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 678 states have (on average 3.6489675516224187) internal successors, (2474), 688 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2474 transitions. [2022-11-20 11:05:51,379 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2474 transitions. Word has length 9 [2022-11-20 11:05:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:51,379 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 2474 transitions. [2022-11-20 11:05:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2474 transitions. [2022-11-20 11:05:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:51,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:51,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:51,592 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1807107775, now seen corresponding path program 1 times [2022-11-20 11:05:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473963714] [2022-11-20 11:05:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:51,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:51,595 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:51,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:51,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:05:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:51,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:51,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473963714] [2022-11-20 11:05:51,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473963714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:51,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:51,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:51,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072390404] [2022-11-20 11:05:51,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:51,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:51,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:51,830 INFO L87 Difference]: Start difference. First operand 689 states and 2474 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:52,284 INFO L93 Difference]: Finished difference Result 900 states and 3158 transitions. [2022-11-20 11:05:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:05:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:52,287 INFO L225 Difference]: With dead ends: 900 [2022-11-20 11:05:52,287 INFO L226 Difference]: Without dead ends: 900 [2022-11-20 11:05:52,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:05:52,288 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:52,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 11 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:05:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-20 11:05:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 840. [2022-11-20 11:05:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 829 states have (on average 3.611580217129071) internal successors, (2994), 839 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2994 transitions. [2022-11-20 11:05:52,310 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2994 transitions. Word has length 9 [2022-11-20 11:05:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 2994 transitions. [2022-11-20 11:05:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2994 transitions. [2022-11-20 11:05:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:52,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:52,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:52,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-20 11:05:52,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:52,519 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1807108159, now seen corresponding path program 2 times [2022-11-20 11:05:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:52,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564810961] [2022-11-20 11:05:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:52,519 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 [2022-11-20 11:05:52,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:52,520 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:52,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 11:05:52,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:52,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:52,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:52,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:52,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:52,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564810961] [2022-11-20 11:05:52,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564810961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:52,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:52,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011204898] [2022-11-20 11:05:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:52,980 INFO L87 Difference]: Start difference. First operand 840 states and 2994 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:53,114 INFO L93 Difference]: Finished difference Result 852 states and 3062 transitions. [2022-11-20 11:05:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:53,116 INFO L225 Difference]: With dead ends: 852 [2022-11-20 11:05:53,116 INFO L226 Difference]: Without dead ends: 852 [2022-11-20 11:05:53,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:53,117 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:53,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 11:05:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-20 11:05:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 846. [2022-11-20 11:05:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 835 states have (on average 3.622754491017964) internal successors, (3025), 845 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3025 transitions. [2022-11-20 11:05:53,153 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3025 transitions. Word has length 9 [2022-11-20 11:05:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:53,154 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 3025 transitions. [2022-11-20 11:05:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3025 transitions. [2022-11-20 11:05:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:53,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:53,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:53,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:53,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:53,367 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1812414739, now seen corresponding path program 3 times [2022-11-20 11:05:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:53,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341329167] [2022-11-20 11:05:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:05:53,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:53,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:53,369 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 11:05:53,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:05:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:53,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:53,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:53,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:53,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341329167] [2022-11-20 11:05:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341329167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:53,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:53,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055453773] [2022-11-20 11:05:53,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:53,833 INFO L87 Difference]: Start difference. First operand 846 states and 3025 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:53,995 INFO L93 Difference]: Finished difference Result 852 states and 3056 transitions. [2022-11-20 11:05:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:53,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:53,999 INFO L225 Difference]: With dead ends: 852 [2022-11-20 11:05:53,999 INFO L226 Difference]: Without dead ends: 852 [2022-11-20 11:05:53,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:53,999 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:54,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 11:05:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-20 11:05:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 846. [2022-11-20 11:05:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 835 states have (on average 3.622754491017964) internal successors, (3025), 845 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3025 transitions. [2022-11-20 11:05:54,024 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3025 transitions. Word has length 9 [2022-11-20 11:05:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:54,024 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 3025 transitions. [2022-11-20 11:05:54,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3025 transitions. [2022-11-20 11:05:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:54,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:54,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:54,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:54,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:54,237 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1812409717, now seen corresponding path program 2 times [2022-11-20 11:05:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:54,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713341002] [2022-11-20 11:05:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:54,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:54,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:54,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:54,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:54,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:05:54,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:05:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:54,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:54,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:54,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:54,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:54,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713341002] [2022-11-20 11:05:54,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713341002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:54,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:54,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:05:54,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455341829] [2022-11-20 11:05:54,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:54,707 INFO L87 Difference]: Start difference. First operand 846 states and 3025 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:54,900 INFO L93 Difference]: Finished difference Result 842 states and 3007 transitions. [2022-11-20 11:05:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:54,903 INFO L225 Difference]: With dead ends: 842 [2022-11-20 11:05:54,904 INFO L226 Difference]: Without dead ends: 842 [2022-11-20 11:05:54,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:54,904 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:54,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 11:05:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-20 11:05:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2022-11-20 11:05:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 831 states have (on average 3.6185318892900122) internal successors, (3007), 841 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 3007 transitions. [2022-11-20 11:05:54,927 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 3007 transitions. Word has length 9 [2022-11-20 11:05:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:54,927 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 3007 transitions. [2022-11-20 11:05:54,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 3007 transitions. [2022-11-20 11:05:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:54,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:54,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:54,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:05:55,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:55,140 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1812600150, now seen corresponding path program 1 times [2022-11-20 11:05:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:55,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148625391] [2022-11-20 11:05:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:55,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:55,143 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:55,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 11:05:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:55,411 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:55,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:55,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:55,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148625391] [2022-11-20 11:05:55,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148625391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:55,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:55,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053789713] [2022-11-20 11:05:55,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:55,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:55,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:55,625 INFO L87 Difference]: Start difference. First operand 842 states and 3007 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:55,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:55,791 INFO L93 Difference]: Finished difference Result 843 states and 3010 transitions. [2022-11-20 11:05:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:55,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:55,794 INFO L225 Difference]: With dead ends: 843 [2022-11-20 11:05:55,794 INFO L226 Difference]: Without dead ends: 843 [2022-11-20 11:05:55,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:55,794 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:05:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-11-20 11:05:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2022-11-20 11:05:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 832 states have (on average 3.6177884615384617) internal successors, (3010), 842 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 3010 transitions. [2022-11-20 11:05:55,818 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 3010 transitions. Word has length 9 [2022-11-20 11:05:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:55,818 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 3010 transitions. [2022-11-20 11:05:55,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 3010 transitions. [2022-11-20 11:05:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:55,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:55,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:55,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:56,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:56,032 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:56,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1812598941, now seen corresponding path program 1 times [2022-11-20 11:05:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720257400] [2022-11-20 11:05:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:56,033 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 [2022-11-20 11:05:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:56,035 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:56,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 11:05:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:05:56,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:56,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:56,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:56,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720257400] [2022-11-20 11:05:56,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720257400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:56,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:56,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:05:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618983152] [2022-11-20 11:05:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:05:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:05:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:05:56,228 INFO L87 Difference]: Start difference. First operand 843 states and 3010 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:56,746 INFO L93 Difference]: Finished difference Result 1991 states and 6993 transitions. [2022-11-20 11:05:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:05:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:56,753 INFO L225 Difference]: With dead ends: 1991 [2022-11-20 11:05:56,753 INFO L226 Difference]: Without dead ends: 1991 [2022-11-20 11:05:56,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:05:56,754 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:56,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 16 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:05:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-11-20 11:05:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1089. [2022-11-20 11:05:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1078 states have (on average 4.025046382189239) internal successors, (4339), 1088 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 4339 transitions. [2022-11-20 11:05:56,812 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 4339 transitions. Word has length 9 [2022-11-20 11:05:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:56,812 INFO L495 AbstractCegarLoop]: Abstraction has 1089 states and 4339 transitions. [2022-11-20 11:05:56,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 4339 transitions. [2022-11-20 11:05:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:56,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:56,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:56,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:57,025 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1812855900, now seen corresponding path program 2 times [2022-11-20 11:05:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630694970] [2022-11-20 11:05:57,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:57,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:57,027 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 11:05:57,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:57,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:05:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:57,283 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:57,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:57,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:57,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:57,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630694970] [2022-11-20 11:05:57,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630694970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:57,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:57,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:57,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946952014] [2022-11-20 11:05:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:05:57,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:57,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:05:57,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:05:57,475 INFO L87 Difference]: Start difference. First operand 1089 states and 4339 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:57,637 INFO L93 Difference]: Finished difference Result 1092 states and 4345 transitions. [2022-11-20 11:05:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:05:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:57,640 INFO L225 Difference]: With dead ends: 1092 [2022-11-20 11:05:57,641 INFO L226 Difference]: Without dead ends: 1092 [2022-11-20 11:05:57,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:05:57,641 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:57,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 11:05:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-11-20 11:05:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1091. [2022-11-20 11:05:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1080 states have (on average 4.020370370370371) internal successors, (4342), 1090 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 4342 transitions. [2022-11-20 11:05:57,670 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 4342 transitions. Word has length 9 [2022-11-20 11:05:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:57,671 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 4342 transitions. [2022-11-20 11:05:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 4342 transitions. [2022-11-20 11:05:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:05:57,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:57,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:57,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:57,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:57,884 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1812818421, now seen corresponding path program 2 times [2022-11-20 11:05:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:57,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599666765] [2022-11-20 11:05:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:05:57,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:57,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:57,886 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:57,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 11:05:58,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:05:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:05:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:58,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:05:58,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:05:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599666765] [2022-11-20 11:05:58,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599666765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:58,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:58,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:05:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933453843] [2022-11-20 11:05:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:05:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:05:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:05:58,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:05:58,093 INFO L87 Difference]: Start difference. First operand 1091 states and 4342 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:05:58,807 INFO L93 Difference]: Finished difference Result 1676 states and 6117 transitions. [2022-11-20 11:05:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:05:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:05:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:05:58,812 INFO L225 Difference]: With dead ends: 1676 [2022-11-20 11:05:58,812 INFO L226 Difference]: Without dead ends: 1676 [2022-11-20 11:05:58,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:05:58,812 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:05:58,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 28 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:05:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-11-20 11:05:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1038. [2022-11-20 11:05:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1027 states have (on average 3.792599805258033) internal successors, (3895), 1037 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3895 transitions. [2022-11-20 11:05:58,845 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3895 transitions. Word has length 9 [2022-11-20 11:05:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:05:58,845 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3895 transitions. [2022-11-20 11:05:58,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3895 transitions. [2022-11-20 11:05:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:05:58,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:05:58,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:58,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:59,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:59,058 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:05:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash 334758798, now seen corresponding path program 1 times [2022-11-20 11:05:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:05:59,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186952524] [2022-11-20 11:05:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:59,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:05:59,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:05:59,060 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:05:59,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 11:05:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:59,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:05:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:59,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:05:59,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:05:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:05:59,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:00,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:00,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186952524] [2022-11-20 11:06:00,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186952524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:00,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:00,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277883450] [2022-11-20 11:06:00,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:00,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:00,110 INFO L87 Difference]: Start difference. First operand 1038 states and 3895 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) [2022-11-20 11:06:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:00,660 INFO L93 Difference]: Finished difference Result 1054 states and 3955 transitions. [2022-11-20 11:06:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:00,661 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 [2022-11-20 11:06:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:00,664 INFO L225 Difference]: With dead ends: 1054 [2022-11-20 11:06:00,664 INFO L226 Difference]: Without dead ends: 1054 [2022-11-20 11:06:00,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:00,664 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:00,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-20 11:06:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-11-20 11:06:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1046. [2022-11-20 11:06:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1035 states have (on average 3.794202898550725) internal successors, (3927), 1045 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3927 transitions. [2022-11-20 11:06:00,691 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3927 transitions. Word has length 10 [2022-11-20 11:06:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3927 transitions. [2022-11-20 11:06:00,692 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) [2022-11-20 11:06:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3927 transitions. [2022-11-20 11:06:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:00,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:00,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:00,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:00,905 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 334784850, now seen corresponding path program 1 times [2022-11-20 11:06:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920281546] [2022-11-20 11:06:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:00,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:00,907 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:00,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 11:06:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:06:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:01,191 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:01,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:01,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:02,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:02,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920281546] [2022-11-20 11:06:02,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920281546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:02,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:02,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:02,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22807342] [2022-11-20 11:06:02,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:02,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:02,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:02,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:02,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:02,315 INFO L87 Difference]: Start difference. First operand 1046 states and 3927 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) [2022-11-20 11:06:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:06,125 INFO L93 Difference]: Finished difference Result 2317 states and 8583 transitions. [2022-11-20 11:06:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:06:06,126 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 [2022-11-20 11:06:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:06,131 INFO L225 Difference]: With dead ends: 2317 [2022-11-20 11:06:06,131 INFO L226 Difference]: Without dead ends: 2317 [2022-11-20 11:06:06,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:06:06,132 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 374 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:06,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 45 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 279 Invalid, 0 Unknown, 122 Unchecked, 1.5s Time] [2022-11-20 11:06:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-11-20 11:06:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1582. [2022-11-20 11:06:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1571 states have (on average 3.8746021642266073) internal successors, (6087), 1581 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 6087 transitions. [2022-11-20 11:06:06,164 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 6087 transitions. Word has length 10 [2022-11-20 11:06:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:06,164 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 6087 transitions. [2022-11-20 11:06:06,164 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) [2022-11-20 11:06:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 6087 transitions. [2022-11-20 11:06:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:06,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:06,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:06,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-20 11:06:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:06,366 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 329482908, now seen corresponding path program 2 times [2022-11-20 11:06:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:06,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454157162] [2022-11-20 11:06:06,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:06,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:06,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:06,368 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:06,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 11:06:06,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:06,683 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:06,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:06,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:07,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454157162] [2022-11-20 11:06:07,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454157162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:07,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:07,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:07,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943995643] [2022-11-20 11:06:07,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:07,446 INFO L87 Difference]: Start difference. First operand 1582 states and 6087 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) [2022-11-20 11:06:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:08,063 INFO L93 Difference]: Finished difference Result 1806 states and 7111 transitions. [2022-11-20 11:06:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:06:08,064 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 [2022-11-20 11:06:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:08,082 INFO L225 Difference]: With dead ends: 1806 [2022-11-20 11:06:08,082 INFO L226 Difference]: Without dead ends: 1806 [2022-11-20 11:06:08,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:08,082 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2022-11-20 11:06:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-20 11:06:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1760. [2022-11-20 11:06:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1749 states have (on average 3.9571183533447685) internal successors, (6921), 1759 states have internal predecessors, (6921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6921 transitions. [2022-11-20 11:06:08,111 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6921 transitions. Word has length 10 [2022-11-20 11:06:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:08,111 INFO L495 AbstractCegarLoop]: Abstraction has 1760 states and 6921 transitions. [2022-11-20 11:06:08,112 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) [2022-11-20 11:06:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6921 transitions. [2022-11-20 11:06:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:08,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:08,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:08,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:08,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:08,315 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:08,315 INFO L85 PathProgramCache]: Analyzing trace with hash 329494068, now seen corresponding path program 3 times [2022-11-20 11:06:08,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:08,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779540655] [2022-11-20 11:06:08,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:06:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:08,317 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:08,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 11:06:08,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:06:08,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:08,616 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:08,616 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 17 treesize of output 44 [2022-11-20 11:06:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:08,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:09,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:09,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779540655] [2022-11-20 11:06:09,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779540655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:09,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:09,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885694981] [2022-11-20 11:06:09,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:09,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:09,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:09,520 INFO L87 Difference]: Start difference. First operand 1760 states and 6921 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) [2022-11-20 11:06:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:10,349 INFO L93 Difference]: Finished difference Result 1812 states and 7147 transitions. [2022-11-20 11:06:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:10,351 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 [2022-11-20 11:06:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:10,355 INFO L225 Difference]: With dead ends: 1812 [2022-11-20 11:06:10,356 INFO L226 Difference]: Without dead ends: 1812 [2022-11-20 11:06:10,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:10,356 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:10,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 41 Unchecked, 0.8s Time] [2022-11-20 11:06:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-20 11:06:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1798. [2022-11-20 11:06:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1787 states have (on average 3.9725797425853386) internal successors, (7099), 1797 states have internal predecessors, (7099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 7099 transitions. [2022-11-20 11:06:10,391 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 7099 transitions. Word has length 10 [2022-11-20 11:06:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:10,391 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 7099 transitions. [2022-11-20 11:06:10,391 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) [2022-11-20 11:06:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 7099 transitions. [2022-11-20 11:06:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:10,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:10,393 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:10,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:10,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:10,594 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash -509954592, now seen corresponding path program 2 times [2022-11-20 11:06:10,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:10,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910367930] [2022-11-20 11:06:10,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:10,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:10,596 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:10,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 11:06:10,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:06:10,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:10,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:10,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:11,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:12,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:12,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910367930] [2022-11-20 11:06:12,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910367930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:12,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:12,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:06:12,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521535865] [2022-11-20 11:06:12,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:12,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:06:12,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:12,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:06:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:06:12,666 INFO L87 Difference]: Start difference. First operand 1798 states and 7099 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2022-11-20 11:06:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:23,560 INFO L93 Difference]: Finished difference Result 2391 states and 8679 transitions. [2022-11-20 11:06:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:06:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 [2022-11-20 11:06:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:23,569 INFO L225 Difference]: With dead ends: 2391 [2022-11-20 11:06:23,570 INFO L226 Difference]: Without dead ends: 2391 [2022-11-20 11:06:23,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=316, Invalid=740, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:06:23,571 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 469 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:23,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 168 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-20 11:06:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-20 11:06:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1579. [2022-11-20 11:06:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1568 states have (on average 3.8596938775510203) internal successors, (6052), 1578 states have internal predecessors, (6052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 6052 transitions. [2022-11-20 11:06:23,614 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 6052 transitions. Word has length 10 [2022-11-20 11:06:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:23,615 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 6052 transitions. [2022-11-20 11:06:23,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2022-11-20 11:06:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 6052 transitions. [2022-11-20 11:06:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:23,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:23,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:23,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:23,817 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -186725671, now seen corresponding path program 1 times [2022-11-20 11:06:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500995693] [2022-11-20 11:06:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:23,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:23,818 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:23,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 11:06:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:24,114 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:24,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:24,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:24,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:24,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500995693] [2022-11-20 11:06:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500995693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:24,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:24,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046459386] [2022-11-20 11:06:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:24,313 INFO L87 Difference]: Start difference. First operand 1579 states and 6052 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:24,519 INFO L93 Difference]: Finished difference Result 1579 states and 6048 transitions. [2022-11-20 11:06:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:24,524 INFO L225 Difference]: With dead ends: 1579 [2022-11-20 11:06:24,524 INFO L226 Difference]: Without dead ends: 1579 [2022-11-20 11:06:24,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:24,524 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:24,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 11:06:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-20 11:06:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2022-11-20 11:06:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1568 states have (on average 3.857142857142857) internal successors, (6048), 1578 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 6048 transitions. [2022-11-20 11:06:24,568 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 6048 transitions. Word has length 10 [2022-11-20 11:06:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:24,568 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 6048 transitions. [2022-11-20 11:06:24,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 6048 transitions. [2022-11-20 11:06:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:24,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:24,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:24,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:24,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:24,782 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:24,782 INFO L85 PathProgramCache]: Analyzing trace with hash -186771954, now seen corresponding path program 1 times [2022-11-20 11:06:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011407417] [2022-11-20 11:06:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:24,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:24,784 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:24,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 11:06:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:25,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:25,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:25,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:25,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:25,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011407417] [2022-11-20 11:06:25,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011407417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:25,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:25,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:25,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508380804] [2022-11-20 11:06:25,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:25,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:25,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:25,335 INFO L87 Difference]: Start difference. First operand 1579 states and 6048 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:25,499 INFO L93 Difference]: Finished difference Result 1582 states and 6058 transitions. [2022-11-20 11:06:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:25,503 INFO L225 Difference]: With dead ends: 1582 [2022-11-20 11:06:25,503 INFO L226 Difference]: Without dead ends: 1582 [2022-11-20 11:06:25,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:25,504 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:25,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:06:25,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-11-20 11:06:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1580. [2022-11-20 11:06:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1569 states have (on average 3.8565965583173996) internal successors, (6051), 1579 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 6051 transitions. [2022-11-20 11:06:25,530 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 6051 transitions. Word has length 10 [2022-11-20 11:06:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:25,531 INFO L495 AbstractCegarLoop]: Abstraction has 1580 states and 6051 transitions. [2022-11-20 11:06:25,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 6051 transitions. [2022-11-20 11:06:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:25,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:25,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:25,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:25,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:25,732 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -185631371, now seen corresponding path program 1 times [2022-11-20 11:06:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770940868] [2022-11-20 11:06:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:25,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:25,734 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:25,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 11:06:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:26,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:26,018 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 17 treesize of output 44 [2022-11-20 11:06:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:26,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:26,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:26,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770940868] [2022-11-20 11:06:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770940868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:26,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:26,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258681381] [2022-11-20 11:06:26,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:26,270 INFO L87 Difference]: Start difference. First operand 1580 states and 6051 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:26,429 INFO L93 Difference]: Finished difference Result 1592 states and 6101 transitions. [2022-11-20 11:06:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:26,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:26,433 INFO L225 Difference]: With dead ends: 1592 [2022-11-20 11:06:26,433 INFO L226 Difference]: Without dead ends: 1592 [2022-11-20 11:06:26,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:26,434 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:26,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:06:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-11-20 11:06:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1590. [2022-11-20 11:06:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1579 states have (on average 3.8581380620645978) internal successors, (6092), 1589 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 6092 transitions. [2022-11-20 11:06:26,462 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 6092 transitions. Word has length 10 [2022-11-20 11:06:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:26,462 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 6092 transitions. [2022-11-20 11:06:26,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 6092 transitions. [2022-11-20 11:06:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:26,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:26,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:26,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:26,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:26,664 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:26,664 INFO L85 PathProgramCache]: Analyzing trace with hash -185766872, now seen corresponding path program 1 times [2022-11-20 11:06:26,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115569788] [2022-11-20 11:06:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:26,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:26,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:26,666 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:26,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 11:06:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:26,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:26,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:26,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:27,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:27,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115569788] [2022-11-20 11:06:27,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115569788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:27,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:27,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128698265] [2022-11-20 11:06:27,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:27,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:27,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:27,189 INFO L87 Difference]: Start difference. First operand 1590 states and 6092 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:27,315 INFO L93 Difference]: Finished difference Result 1613 states and 6240 transitions. [2022-11-20 11:06:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:27,320 INFO L225 Difference]: With dead ends: 1613 [2022-11-20 11:06:27,320 INFO L226 Difference]: Without dead ends: 1613 [2022-11-20 11:06:27,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:27,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:27,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:06:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2022-11-20 11:06:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1600. [2022-11-20 11:06:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1589 states have (on average 3.8735053492762743) internal successors, (6155), 1599 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6155 transitions. [2022-11-20 11:06:27,347 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6155 transitions. Word has length 10 [2022-11-20 11:06:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:27,348 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 6155 transitions. [2022-11-20 11:06:27,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6155 transitions. [2022-11-20 11:06:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:27,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:27,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:27,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:27,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:27,549 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -185775521, now seen corresponding path program 2 times [2022-11-20 11:06:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:27,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765601591] [2022-11-20 11:06:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:27,552 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:27,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:27,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:06:27,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:27,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:27,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:27,837 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:28,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:28,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765601591] [2022-11-20 11:06:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765601591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:28,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:28,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:28,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716765667] [2022-11-20 11:06:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:28,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:28,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:28,073 INFO L87 Difference]: Start difference. First operand 1600 states and 6155 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:28,226 INFO L93 Difference]: Finished difference Result 1590 states and 6125 transitions. [2022-11-20 11:06:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:28,231 INFO L225 Difference]: With dead ends: 1590 [2022-11-20 11:06:28,231 INFO L226 Difference]: Without dead ends: 1590 [2022-11-20 11:06:28,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:28,231 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:28,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 11:06:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-11-20 11:06:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1579. [2022-11-20 11:06:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1568 states have (on average 3.8769132653061225) internal successors, (6079), 1578 states have internal predecessors, (6079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 6079 transitions. [2022-11-20 11:06:28,274 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 6079 transitions. Word has length 10 [2022-11-20 11:06:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 1579 states and 6079 transitions. [2022-11-20 11:06:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 6079 transitions. [2022-11-20 11:06:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:28,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:28,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:28,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:28,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:28,487 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:28,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:28,487 INFO L85 PathProgramCache]: Analyzing trace with hash -185779892, now seen corresponding path program 2 times [2022-11-20 11:06:28,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:28,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273470495] [2022-11-20 11:06:28,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:28,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:28,488 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:28,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:28,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:06:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:28,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:28,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:29,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:29,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:29,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273470495] [2022-11-20 11:06:29,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273470495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:29,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:29,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:29,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373005144] [2022-11-20 11:06:29,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:29,013 INFO L87 Difference]: Start difference. First operand 1579 states and 6079 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:29,192 INFO L93 Difference]: Finished difference Result 1580 states and 6074 transitions. [2022-11-20 11:06:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:29,197 INFO L225 Difference]: With dead ends: 1580 [2022-11-20 11:06:29,197 INFO L226 Difference]: Without dead ends: 1580 [2022-11-20 11:06:29,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:29,198 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:29,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 11:06:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-11-20 11:06:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1569. [2022-11-20 11:06:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1558 states have (on average 3.8549422336328627) internal successors, (6006), 1568 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 6006 transitions. [2022-11-20 11:06:29,236 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 6006 transitions. Word has length 10 [2022-11-20 11:06:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:29,236 INFO L495 AbstractCegarLoop]: Abstraction has 1569 states and 6006 transitions. [2022-11-20 11:06:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 6006 transitions. [2022-11-20 11:06:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:29,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:29,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:29,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:29,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:29,450 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash -185774281, now seen corresponding path program 2 times [2022-11-20 11:06:29,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:29,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463694491] [2022-11-20 11:06:29,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:29,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:29,452 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:29,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 11:06:29,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:29,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:29,748 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:29,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:29,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:29,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463694491] [2022-11-20 11:06:29,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463694491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:29,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:29,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206089093] [2022-11-20 11:06:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:29,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:29,947 INFO L87 Difference]: Start difference. First operand 1569 states and 6006 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:30,137 INFO L93 Difference]: Finished difference Result 1570 states and 6005 transitions. [2022-11-20 11:06:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:30,142 INFO L225 Difference]: With dead ends: 1570 [2022-11-20 11:06:30,142 INFO L226 Difference]: Without dead ends: 1570 [2022-11-20 11:06:30,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:30,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:30,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 11:06:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-11-20 11:06:30,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1570. [2022-11-20 11:06:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1559 states have (on average 3.851828094932649) internal successors, (6005), 1569 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 6005 transitions. [2022-11-20 11:06:30,170 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 6005 transitions. Word has length 10 [2022-11-20 11:06:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:30,171 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 6005 transitions. [2022-11-20 11:06:30,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 6005 transitions. [2022-11-20 11:06:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:30,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:30,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:30,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:30,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:30,385 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -187027704, now seen corresponding path program 2 times [2022-11-20 11:06:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:30,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600706040] [2022-11-20 11:06:30,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:30,386 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 [2022-11-20 11:06:30,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:30,387 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:30,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:30,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:06:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:30,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:30,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:30,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:30,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:30,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600706040] [2022-11-20 11:06:30,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600706040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:30,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:30,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:30,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918861015] [2022-11-20 11:06:30,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:30,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:30,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:30,944 INFO L87 Difference]: Start difference. First operand 1570 states and 6005 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:31,112 INFO L93 Difference]: Finished difference Result 1573 states and 6015 transitions. [2022-11-20 11:06:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:31,116 INFO L225 Difference]: With dead ends: 1573 [2022-11-20 11:06:31,117 INFO L226 Difference]: Without dead ends: 1573 [2022-11-20 11:06:31,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:31,118 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:31,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 11:06:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-20 11:06:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1570. [2022-11-20 11:06:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1559 states have (on average 3.851828094932649) internal successors, (6005), 1569 states have internal predecessors, (6005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 6005 transitions. [2022-11-20 11:06:31,184 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 6005 transitions. Word has length 10 [2022-11-20 11:06:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:31,184 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 6005 transitions. [2022-11-20 11:06:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 6005 transitions. [2022-11-20 11:06:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:31,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:31,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:31,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:06:31,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:31,395 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:31,396 INFO L85 PathProgramCache]: Analyzing trace with hash -350324544, now seen corresponding path program 3 times [2022-11-20 11:06:31,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828815442] [2022-11-20 11:06:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:06:31,396 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 [2022-11-20 11:06:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:31,397 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:31,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:31,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:06:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:31,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:31,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:31,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:31,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828815442] [2022-11-20 11:06:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828815442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:31,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620045108] [2022-11-20 11:06:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:31,935 INFO L87 Difference]: Start difference. First operand 1570 states and 6005 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:32,130 INFO L93 Difference]: Finished difference Result 1572 states and 6011 transitions. [2022-11-20 11:06:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:32,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:32,135 INFO L225 Difference]: With dead ends: 1572 [2022-11-20 11:06:32,135 INFO L226 Difference]: Without dead ends: 1572 [2022-11-20 11:06:32,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:32,136 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:32,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:06:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-11-20 11:06:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1571. [2022-11-20 11:06:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1560 states have (on average 3.8512820512820514) internal successors, (6008), 1570 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6008 transitions. [2022-11-20 11:06:32,164 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6008 transitions. Word has length 10 [2022-11-20 11:06:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:32,164 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 6008 transitions. [2022-11-20 11:06:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6008 transitions. [2022-11-20 11:06:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:32,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:32,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:32,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:32,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:32,378 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -356026002, now seen corresponding path program 1 times [2022-11-20 11:06:32,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:32,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802030570] [2022-11-20 11:06:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:32,380 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:32,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 11:06:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:32,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:32,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:32,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:32,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:32,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802030570] [2022-11-20 11:06:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802030570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:32,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:32,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:32,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807803456] [2022-11-20 11:06:32,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:32,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:32,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:32,896 INFO L87 Difference]: Start difference. First operand 1571 states and 6008 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:33,090 INFO L93 Difference]: Finished difference Result 1571 states and 6007 transitions. [2022-11-20 11:06:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:33,094 INFO L225 Difference]: With dead ends: 1571 [2022-11-20 11:06:33,094 INFO L226 Difference]: Without dead ends: 1571 [2022-11-20 11:06:33,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:33,095 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:33,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:06:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-11-20 11:06:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1571. [2022-11-20 11:06:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1560 states have (on average 3.8506410256410257) internal successors, (6007), 1570 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6007 transitions. [2022-11-20 11:06:33,121 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6007 transitions. Word has length 10 [2022-11-20 11:06:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:33,122 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 6007 transitions. [2022-11-20 11:06:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6007 transitions. [2022-11-20 11:06:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:33,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:33,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:33,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-20 11:06:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:33,335 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -363954624, now seen corresponding path program 4 times [2022-11-20 11:06:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055549401] [2022-11-20 11:06:33,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:06:33,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:33,337 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:33,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 11:06:33,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:06:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:33,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:33,643 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 [2022-11-20 11:06:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:33,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:33,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:33,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055549401] [2022-11-20 11:06:33,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055549401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:33,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:33,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074337607] [2022-11-20 11:06:33,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:33,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:33,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:33,882 INFO L87 Difference]: Start difference. First operand 1571 states and 6007 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:34,059 INFO L93 Difference]: Finished difference Result 1573 states and 6013 transitions. [2022-11-20 11:06:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:34,064 INFO L225 Difference]: With dead ends: 1573 [2022-11-20 11:06:34,064 INFO L226 Difference]: Without dead ends: 1573 [2022-11-20 11:06:34,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:34,065 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:34,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:06:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-20 11:06:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1571. [2022-11-20 11:06:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1560 states have (on average 3.8506410256410257) internal successors, (6007), 1570 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6007 transitions. [2022-11-20 11:06:34,115 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6007 transitions. Word has length 10 [2022-11-20 11:06:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 6007 transitions. [2022-11-20 11:06:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6007 transitions. [2022-11-20 11:06:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:06:34,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:34,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:34,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:34,328 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -363954252, now seen corresponding path program 2 times [2022-11-20 11:06:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:34,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573516151] [2022-11-20 11:06:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:34,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:34,330 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:34,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 11:06:34,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:34,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:34,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:34,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:34,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:34,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573516151] [2022-11-20 11:06:34,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573516151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:34,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:34,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:34,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426142377] [2022-11-20 11:06:34,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:34,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:34,859 INFO L87 Difference]: Start difference. First operand 1571 states and 6007 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:35,052 INFO L93 Difference]: Finished difference Result 1571 states and 6006 transitions. [2022-11-20 11:06:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:35,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:06:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:35,057 INFO L225 Difference]: With dead ends: 1571 [2022-11-20 11:06:35,057 INFO L226 Difference]: Without dead ends: 1571 [2022-11-20 11:06:35,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:35,057 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:35,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-20 11:06:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-11-20 11:06:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1570. [2022-11-20 11:06:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1559 states have (on average 3.851186658114176) internal successors, (6004), 1569 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 6004 transitions. [2022-11-20 11:06:35,087 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 6004 transitions. Word has length 10 [2022-11-20 11:06:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:35,087 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 6004 transitions. [2022-11-20 11:06:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 6004 transitions. [2022-11-20 11:06:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:35,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:35,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:35,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:35,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:35,289 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1787436264, now seen corresponding path program 1 times [2022-11-20 11:06:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121630603] [2022-11-20 11:06:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:35,291 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:35,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 11:06:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:06:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:35,606 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:35,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:35,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:36,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121630603] [2022-11-20 11:06:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121630603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:36,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:36,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:36,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692690976] [2022-11-20 11:06:36,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:36,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:36,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:36,497 INFO L87 Difference]: Start difference. First operand 1570 states and 6004 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) [2022-11-20 11:06:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:37,085 INFO L93 Difference]: Finished difference Result 1607 states and 6171 transitions. [2022-11-20 11:06:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:06:37,087 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 [2022-11-20 11:06:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:37,090 INFO L225 Difference]: With dead ends: 1607 [2022-11-20 11:06:37,090 INFO L226 Difference]: Without dead ends: 1607 [2022-11-20 11:06:37,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:37,091 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:37,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 15 Unchecked, 0.5s Time] [2022-11-20 11:06:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-11-20 11:06:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1583. [2022-11-20 11:06:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1572 states have (on average 3.8606870229007635) internal successors, (6069), 1582 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 6069 transitions. [2022-11-20 11:06:37,130 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 6069 transitions. Word has length 11 [2022-11-20 11:06:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:37,130 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 6069 transitions. [2022-11-20 11:06:37,130 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) [2022-11-20 11:06:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 6069 transitions. [2022-11-20 11:06:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:37,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:37,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:37,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:37,336 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1787586924, now seen corresponding path program 2 times [2022-11-20 11:06:37,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:37,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47281040] [2022-11-20 11:06:37,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:37,337 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 [2022-11-20 11:06:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:37,341 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:37,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 11:06:37,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:37,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:37,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:37,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:37,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:38,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47281040] [2022-11-20 11:06:38,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47281040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:38,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:38,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:38,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575019243] [2022-11-20 11:06:38,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:38,526 INFO L87 Difference]: Start difference. First operand 1583 states and 6069 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) [2022-11-20 11:06:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:39,287 INFO L93 Difference]: Finished difference Result 1672 states and 6463 transitions. [2022-11-20 11:06:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:39,288 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 [2022-11-20 11:06:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:39,293 INFO L225 Difference]: With dead ends: 1672 [2022-11-20 11:06:39,293 INFO L226 Difference]: Without dead ends: 1672 [2022-11-20 11:06:39,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:39,293 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:39,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 12 Unchecked, 0.7s Time] [2022-11-20 11:06:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-11-20 11:06:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1583. [2022-11-20 11:06:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1572 states have (on average 3.8568702290076335) internal successors, (6063), 1582 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 6063 transitions. [2022-11-20 11:06:39,320 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 6063 transitions. Word has length 11 [2022-11-20 11:06:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 6063 transitions. [2022-11-20 11:06:39,320 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) [2022-11-20 11:06:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 6063 transitions. [2022-11-20 11:06:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:39,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:39,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:39,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:39,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:39,522 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:39,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1788387654, now seen corresponding path program 3 times [2022-11-20 11:06:39,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:39,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324675401] [2022-11-20 11:06:39,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:06:39,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:39,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:39,524 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:39,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 11:06:39,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:06:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:39,855 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:39,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:40,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:40,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:40,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324675401] [2022-11-20 11:06:40,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324675401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:40,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:40,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303509951] [2022-11-20 11:06:40,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:40,695 INFO L87 Difference]: Start difference. First operand 1583 states and 6063 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) [2022-11-20 11:06:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:41,230 INFO L93 Difference]: Finished difference Result 1607 states and 6177 transitions. [2022-11-20 11:06:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:41,231 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 [2022-11-20 11:06:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:41,234 INFO L225 Difference]: With dead ends: 1607 [2022-11-20 11:06:41,235 INFO L226 Difference]: Without dead ends: 1607 [2022-11-20 11:06:41,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:41,235 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:41,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 11:06:41,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-11-20 11:06:41,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1583. [2022-11-20 11:06:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1572 states have (on average 3.8568702290076335) internal successors, (6063), 1582 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 6063 transitions. [2022-11-20 11:06:41,259 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 6063 transitions. Word has length 11 [2022-11-20 11:06:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:41,259 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 6063 transitions. [2022-11-20 11:06:41,259 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) [2022-11-20 11:06:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 6063 transitions. [2022-11-20 11:06:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:41,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:41,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:41,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:41,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:41,461 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1624034334, now seen corresponding path program 4 times [2022-11-20 11:06:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700674156] [2022-11-20 11:06:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:06:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:41,463 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:41,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 11:06:41,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:06:41,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:06:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:41,778 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:41,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:42,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:42,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700674156] [2022-11-20 11:06:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700674156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:42,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:42,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754889994] [2022-11-20 11:06:42,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:42,690 INFO L87 Difference]: Start difference. First operand 1583 states and 6063 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) [2022-11-20 11:06:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:43,449 INFO L93 Difference]: Finished difference Result 1721 states and 6681 transitions. [2022-11-20 11:06:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:06:43,450 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 [2022-11-20 11:06:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:43,454 INFO L225 Difference]: With dead ends: 1721 [2022-11-20 11:06:43,454 INFO L226 Difference]: Without dead ends: 1721 [2022-11-20 11:06:43,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:43,454 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:43,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 34 Unchecked, 0.7s Time] [2022-11-20 11:06:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-11-20 11:06:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1611. [2022-11-20 11:06:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1600 states have (on average 3.879375) internal successors, (6207), 1610 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 6207 transitions. [2022-11-20 11:06:43,498 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 6207 transitions. Word has length 11 [2022-11-20 11:06:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:43,498 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 6207 transitions. [2022-11-20 11:06:43,498 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) [2022-11-20 11:06:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 6207 transitions. [2022-11-20 11:06:43,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:43,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:43,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:43,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-20 11:06:43,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:43,711 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1618170622, now seen corresponding path program 1 times [2022-11-20 11:06:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:43,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627647478] [2022-11-20 11:06:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:43,712 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:43,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 11:06:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:06:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:44,014 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:44,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:44,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:44,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:44,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627647478] [2022-11-20 11:06:44,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627647478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:44,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:44,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141423859] [2022-11-20 11:06:44,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:44,994 INFO L87 Difference]: Start difference. First operand 1611 states and 6207 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) [2022-11-20 11:06:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:45,608 INFO L93 Difference]: Finished difference Result 1639 states and 6334 transitions. [2022-11-20 11:06:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:45,609 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 [2022-11-20 11:06:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:45,613 INFO L225 Difference]: With dead ends: 1639 [2022-11-20 11:06:45,614 INFO L226 Difference]: Without dead ends: 1639 [2022-11-20 11:06:45,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:45,614 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:45,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 12 Unchecked, 0.5s Time] [2022-11-20 11:06:45,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-11-20 11:06:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1625. [2022-11-20 11:06:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1614 states have (on average 3.885377942998761) internal successors, (6271), 1624 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:45,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 6271 transitions. [2022-11-20 11:06:45,652 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 6271 transitions. Word has length 11 [2022-11-20 11:06:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:45,652 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 6271 transitions. [2022-11-20 11:06:45,652 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) [2022-11-20 11:06:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 6271 transitions. [2022-11-20 11:06:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:45,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:45,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:45,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:45,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:45,854 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1618173412, now seen corresponding path program 2 times [2022-11-20 11:06:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:45,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870357495] [2022-11-20 11:06:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:45,856 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 11:06:46,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:46,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:46,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:46,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:46,253 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 17 treesize of output 44 [2022-11-20 11:06:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:46,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:47,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870357495] [2022-11-20 11:06:47,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870357495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:47,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:47,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655595205] [2022-11-20 11:06:47,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:47,086 INFO L87 Difference]: Start difference. First operand 1625 states and 6271 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) [2022-11-20 11:06:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:47,335 INFO L93 Difference]: Finished difference Result 1659 states and 6440 transitions. [2022-11-20 11:06:47,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:06:47,336 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 [2022-11-20 11:06:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:47,341 INFO L225 Difference]: With dead ends: 1659 [2022-11-20 11:06:47,341 INFO L226 Difference]: Without dead ends: 1659 [2022-11-20 11:06:47,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:47,341 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:47,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 11:06:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-11-20 11:06:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1650. [2022-11-20 11:06:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1639 states have (on average 3.9048200122025625) internal successors, (6400), 1649 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6400 transitions. [2022-11-20 11:06:47,384 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6400 transitions. Word has length 11 [2022-11-20 11:06:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:47,384 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 6400 transitions. [2022-11-20 11:06:47,385 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) [2022-11-20 11:06:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6400 transitions. [2022-11-20 11:06:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:47,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:47,386 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:47,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-20 11:06:47,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:47,586 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1624396848, now seen corresponding path program 2 times [2022-11-20 11:06:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832285730] [2022-11-20 11:06:47,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:47,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:47,589 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:47,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 11:06:47,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:47,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:47,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:48,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:49,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832285730] [2022-11-20 11:06:49,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832285730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:49,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:49,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-11-20 11:06:49,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791741725] [2022-11-20 11:06:49,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:06:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:06:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:06:49,181 INFO L87 Difference]: Start difference. First operand 1650 states and 6400 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) 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) [2022-11-20 11:06:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:52,932 INFO L93 Difference]: Finished difference Result 2141 states and 7845 transitions. [2022-11-20 11:06:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:06:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) 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 11 [2022-11-20 11:06:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:52,944 INFO L225 Difference]: With dead ends: 2141 [2022-11-20 11:06:52,944 INFO L226 Difference]: Without dead ends: 2141 [2022-11-20 11:06:52,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:06:52,945 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:52,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 133 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 574 Invalid, 0 Unknown, 251 Unchecked, 3.3s Time] [2022-11-20 11:06:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-11-20 11:06:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1832. [2022-11-20 11:06:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1821 states have (on average 3.9505766062602965) internal successors, (7194), 1831 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7194 transitions. [2022-11-20 11:06:52,980 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7194 transitions. Word has length 11 [2022-11-20 11:06:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:52,981 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7194 transitions. [2022-11-20 11:06:52,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) 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) [2022-11-20 11:06:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7194 transitions. [2022-11-20 11:06:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:52,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:52,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:52,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-20 11:06:53,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:53,183 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:53,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1611369532, now seen corresponding path program 3 times [2022-11-20 11:06:53,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:53,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988867576] [2022-11-20 11:06:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:06:53,183 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 [2022-11-20 11:06:53,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:53,185 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:53,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 11:06:53,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:06:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:06:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:53,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:53,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:53,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:06:54,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988867576] [2022-11-20 11:06:54,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988867576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:54,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:06:54,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:06:54,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290073713] [2022-11-20 11:06:54,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:06:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:54,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:06:54,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:06:54,317 INFO L87 Difference]: Start difference. First operand 1832 states and 7194 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) [2022-11-20 11:06:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:54,872 INFO L93 Difference]: Finished difference Result 1861 states and 7335 transitions. [2022-11-20 11:06:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:06:54,873 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 [2022-11-20 11:06:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:54,878 INFO L225 Difference]: With dead ends: 1861 [2022-11-20 11:06:54,878 INFO L226 Difference]: Without dead ends: 1861 [2022-11-20 11:06:54,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:06:54,878 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:54,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-20 11:06:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-20 11:06:54,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1845. [2022-11-20 11:06:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1834 states have (on average 3.9591057797164666) internal successors, (7261), 1844 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 7261 transitions. [2022-11-20 11:06:54,925 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 7261 transitions. Word has length 11 [2022-11-20 11:06:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:54,926 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 7261 transitions. [2022-11-20 11:06:54,926 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) [2022-11-20 11:06:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 7261 transitions. [2022-11-20 11:06:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:54,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:54,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:54,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:55,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:55,140 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:55,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1493563145, now seen corresponding path program 1 times [2022-11-20 11:06:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:55,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650818942] [2022-11-20 11:06:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:55,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:55,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:55,141 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:55,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 11:06:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:55,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:55,446 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 [2022-11-20 11:06:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:55,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:55,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650818942] [2022-11-20 11:06:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650818942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:55,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:55,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762876910] [2022-11-20 11:06:55,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:55,640 INFO L87 Difference]: Start difference. First operand 1845 states and 7261 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:55,826 INFO L93 Difference]: Finished difference Result 1845 states and 7257 transitions. [2022-11-20 11:06:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:06:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:55,831 INFO L225 Difference]: With dead ends: 1845 [2022-11-20 11:06:55,832 INFO L226 Difference]: Without dead ends: 1845 [2022-11-20 11:06:55,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:55,832 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:06:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2022-11-20 11:06:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1845. [2022-11-20 11:06:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1834 states have (on average 3.956924754634678) internal successors, (7257), 1844 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 7257 transitions. [2022-11-20 11:06:55,864 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 7257 transitions. Word has length 11 [2022-11-20 11:06:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:55,864 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 7257 transitions. [2022-11-20 11:06:55,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 7257 transitions. [2022-11-20 11:06:55,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:55,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:55,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:55,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:56,066 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1493726670, now seen corresponding path program 1 times [2022-11-20 11:06:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10693068] [2022-11-20 11:06:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:56,068 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:56,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 11:06:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:56,372 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:56,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:56,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:56,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:56,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10693068] [2022-11-20 11:06:56,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10693068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:56,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:56,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:56,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599456655] [2022-11-20 11:06:56,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:56,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:56,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:56,655 INFO L87 Difference]: Start difference. First operand 1845 states and 7257 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:56,826 INFO L93 Difference]: Finished difference Result 1895 states and 7462 transitions. [2022-11-20 11:06:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:06:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:56,832 INFO L225 Difference]: With dead ends: 1895 [2022-11-20 11:06:56,832 INFO L226 Difference]: Without dead ends: 1895 [2022-11-20 11:06:56,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:56,833 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:56,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 11 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 11:06:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-11-20 11:06:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1845. [2022-11-20 11:06:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1834 states have (on average 3.956924754634678) internal successors, (7257), 1844 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 7257 transitions. [2022-11-20 11:06:56,864 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 7257 transitions. Word has length 11 [2022-11-20 11:06:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:56,864 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 7257 transitions. [2022-11-20 11:06:56,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 7257 transitions. [2022-11-20 11:06:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:56,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:56,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:56,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:57,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:57,066 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1494959478, now seen corresponding path program 1 times [2022-11-20 11:06:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:57,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674586385] [2022-11-20 11:06:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:57,067 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:57,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:06:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:57,370 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:57,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:57,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:57,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:57,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674586385] [2022-11-20 11:06:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674586385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:57,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:57,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:06:57,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669796791] [2022-11-20 11:06:57,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:57,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:57,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:57,563 INFO L87 Difference]: Start difference. First operand 1845 states and 7257 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:57,762 INFO L93 Difference]: Finished difference Result 1853 states and 7279 transitions. [2022-11-20 11:06:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:06:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:57,767 INFO L225 Difference]: With dead ends: 1853 [2022-11-20 11:06:57,767 INFO L226 Difference]: Without dead ends: 1853 [2022-11-20 11:06:57,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:57,768 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:57,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 11:06:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-11-20 11:06:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1849. [2022-11-20 11:06:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1838 states have (on average 3.953754080522307) internal successors, (7267), 1848 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) [2022-11-20 11:06:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 7267 transitions. [2022-11-20 11:06:57,797 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 7267 transitions. Word has length 11 [2022-11-20 11:06:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:57,797 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 7267 transitions. [2022-11-20 11:06:57,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 7267 transitions. [2022-11-20 11:06:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:57,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:57,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:57,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:57,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:57,999 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1459593996, now seen corresponding path program 1 times [2022-11-20 11:06:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:57,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565489232] [2022-11-20 11:06:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:58,000 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 [2022-11-20 11:06:58,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:58,000 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:58,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:58,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:58,304 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:58,304 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 [2022-11-20 11:06:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:58,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:58,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565489232] [2022-11-20 11:06:58,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565489232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:58,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:58,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:58,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921299676] [2022-11-20 11:06:58,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:58,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:58,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:58,552 INFO L87 Difference]: Start difference. First operand 1849 states and 7267 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:58,683 INFO L93 Difference]: Finished difference Result 1906 states and 7582 transitions. [2022-11-20 11:06:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:06:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:58,689 INFO L225 Difference]: With dead ends: 1906 [2022-11-20 11:06:58,689 INFO L226 Difference]: Without dead ends: 1906 [2022-11-20 11:06:58,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:58,689 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:58,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 11:06:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-11-20 11:06:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1859. [2022-11-20 11:06:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1848 states have (on average 3.961038961038961) internal successors, (7320), 1858 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 7320 transitions. [2022-11-20 11:06:58,739 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 7320 transitions. Word has length 11 [2022-11-20 11:06:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:58,740 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 7320 transitions. [2022-11-20 11:06:58,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 7320 transitions. [2022-11-20 11:06:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:58,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:58,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:58,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:06:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:58,953 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:58,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1459607016, now seen corresponding path program 2 times [2022-11-20 11:06:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:58,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468753550] [2022-11-20 11:06:58,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:58,955 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:58,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 11:06:59,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:06:59,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:06:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:59,266 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:06:59,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:06:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:59,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:06:59,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:06:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468753550] [2022-11-20 11:06:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468753550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:06:59,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:06:59,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:06:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688108152] [2022-11-20 11:06:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:06:59,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:06:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:06:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:06:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:06:59,537 INFO L87 Difference]: Start difference. First operand 1859 states and 7320 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:06:59,708 INFO L93 Difference]: Finished difference Result 1902 states and 7550 transitions. [2022-11-20 11:06:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:06:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:06:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:06:59,713 INFO L225 Difference]: With dead ends: 1902 [2022-11-20 11:06:59,714 INFO L226 Difference]: Without dead ends: 1902 [2022-11-20 11:06:59,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:06:59,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:06:59,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 11:06:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-11-20 11:06:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1869. [2022-11-20 11:06:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1858 states have (on average 3.9617868675995696) internal successors, (7361), 1868 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 7361 transitions. [2022-11-20 11:06:59,762 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 7361 transitions. Word has length 11 [2022-11-20 11:06:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:06:59,763 INFO L495 AbstractCegarLoop]: Abstraction has 1869 states and 7361 transitions. [2022-11-20 11:06:59,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 7361 transitions. [2022-11-20 11:06:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:06:59,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:06:59,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:59,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 11:06:59,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:06:59,976 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:06:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1459601405, now seen corresponding path program 2 times [2022-11-20 11:06:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:06:59,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054130033] [2022-11-20 11:06:59,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:06:59,977 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 [2022-11-20 11:06:59,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:06:59,978 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:06:59,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:00,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:07:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:00,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:00,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:00,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:00,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:00,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054130033] [2022-11-20 11:07:00,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054130033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:00,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:00,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074122948] [2022-11-20 11:07:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:00,498 INFO L87 Difference]: Start difference. First operand 1869 states and 7361 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:00,671 INFO L93 Difference]: Finished difference Result 1869 states and 7357 transitions. [2022-11-20 11:07:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:00,676 INFO L225 Difference]: With dead ends: 1869 [2022-11-20 11:07:00,676 INFO L226 Difference]: Without dead ends: 1869 [2022-11-20 11:07:00,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:00,677 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:00,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-20 11:07:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-20 11:07:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1869. [2022-11-20 11:07:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1858 states have (on average 3.959634015069968) internal successors, (7357), 1868 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) [2022-11-20 11:07:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 7357 transitions. [2022-11-20 11:07:00,709 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 7357 transitions. Word has length 11 [2022-11-20 11:07:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:00,709 INFO L495 AbstractCegarLoop]: Abstraction has 1869 states and 7357 transitions. [2022-11-20 11:07:00,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 7357 transitions. [2022-11-20 11:07:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:00,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:00,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:00,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:00,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:00,910 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:00,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1463803176, now seen corresponding path program 3 times [2022-11-20 11:07:00,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:00,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687215919] [2022-11-20 11:07:00,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:00,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:00,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:00,912 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:00,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:01,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:07:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:01,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:01,217 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:01,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:01,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:01,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:01,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687215919] [2022-11-20 11:07:01,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687215919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:01,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:01,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:01,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716960706] [2022-11-20 11:07:01,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:01,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:01,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:01,481 INFO L87 Difference]: Start difference. First operand 1869 states and 7357 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:01,625 INFO L93 Difference]: Finished difference Result 1911 states and 7614 transitions. [2022-11-20 11:07:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:01,631 INFO L225 Difference]: With dead ends: 1911 [2022-11-20 11:07:01,631 INFO L226 Difference]: Without dead ends: 1911 [2022-11-20 11:07:01,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:01,631 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:01,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:07:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-20 11:07:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1881. [2022-11-20 11:07:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1870 states have (on average 3.971657754010695) internal successors, (7427), 1880 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 7427 transitions. [2022-11-20 11:07:01,660 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 7427 transitions. Word has length 11 [2022-11-20 11:07:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:01,660 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 7427 transitions. [2022-11-20 11:07:01,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 7427 transitions. [2022-11-20 11:07:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:01,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:01,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:01,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-20 11:07:01,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:01,862 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1463802990, now seen corresponding path program 1 times [2022-11-20 11:07:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846402613] [2022-11-20 11:07:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:07:01,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:01,864 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:01,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 11:07:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:07:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:02,176 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:02,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:02,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:02,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846402613] [2022-11-20 11:07:02,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846402613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:02,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:02,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712948508] [2022-11-20 11:07:02,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:02,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:02,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:02,426 INFO L87 Difference]: Start difference. First operand 1881 states and 7427 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:02,563 INFO L93 Difference]: Finished difference Result 1901 states and 7540 transitions. [2022-11-20 11:07:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:02,568 INFO L225 Difference]: With dead ends: 1901 [2022-11-20 11:07:02,569 INFO L226 Difference]: Without dead ends: 1901 [2022-11-20 11:07:02,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:02,569 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:02,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:07:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-11-20 11:07:02,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1889. [2022-11-20 11:07:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1878 states have (on average 3.972310969116081) internal successors, (7460), 1888 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 7460 transitions. [2022-11-20 11:07:02,615 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 7460 transitions. Word has length 11 [2022-11-20 11:07:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:02,616 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 7460 transitions. [2022-11-20 11:07:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 7460 transitions. [2022-11-20 11:07:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:02,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:02,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:02,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:02,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:02,829 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:02,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1463653260, now seen corresponding path program 2 times [2022-11-20 11:07:02,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:02,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666592902] [2022-11-20 11:07:02,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:02,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:02,831 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:02,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:02,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:07:02,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:03,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:03,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:03,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:03,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:03,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666592902] [2022-11-20 11:07:03,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666592902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:03,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:03,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44167502] [2022-11-20 11:07:03,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:03,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:03,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:03,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:03,406 INFO L87 Difference]: Start difference. First operand 1889 states and 7460 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:03,557 INFO L93 Difference]: Finished difference Result 1921 states and 7621 transitions. [2022-11-20 11:07:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:03,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:03,563 INFO L225 Difference]: With dead ends: 1921 [2022-11-20 11:07:03,563 INFO L226 Difference]: Without dead ends: 1921 [2022-11-20 11:07:03,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:03,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:03,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:07:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-20 11:07:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1889. [2022-11-20 11:07:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1878 states have (on average 3.972310969116081) internal successors, (7460), 1888 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 7460 transitions. [2022-11-20 11:07:03,594 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 7460 transitions. Word has length 11 [2022-11-20 11:07:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:03,595 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 7460 transitions. [2022-11-20 11:07:03,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 7460 transitions. [2022-11-20 11:07:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:03,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:03,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:03,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:03,797 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1464075666, now seen corresponding path program 4 times [2022-11-20 11:07:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:03,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592646995] [2022-11-20 11:07:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:07:03,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:03,798 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:03,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:03,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:07:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:04,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:04,124 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:04,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:04,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:04,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592646995] [2022-11-20 11:07:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592646995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:04,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:04,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049255930] [2022-11-20 11:07:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:04,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:04,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:04,373 INFO L87 Difference]: Start difference. First operand 1889 states and 7460 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:04,524 INFO L93 Difference]: Finished difference Result 1889 states and 7450 transitions. [2022-11-20 11:07:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:04,529 INFO L225 Difference]: With dead ends: 1889 [2022-11-20 11:07:04,529 INFO L226 Difference]: Without dead ends: 1889 [2022-11-20 11:07:04,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:04,529 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:04,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:07:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-20 11:07:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1871. [2022-11-20 11:07:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1860 states have (on average 3.9596774193548385) internal successors, (7365), 1870 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 7365 transitions. [2022-11-20 11:07:04,559 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 7365 transitions. Word has length 11 [2022-11-20 11:07:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 7365 transitions. [2022-11-20 11:07:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 7365 transitions. [2022-11-20 11:07:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:04,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:04,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:04,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:04,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:04,761 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1464070055, now seen corresponding path program 3 times [2022-11-20 11:07:04,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:04,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352789097] [2022-11-20 11:07:04,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:04,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:04,762 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 11:07:04,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:07:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:05,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:05,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:05,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:05,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352789097] [2022-11-20 11:07:05,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352789097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:05,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:05,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:05,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729441251] [2022-11-20 11:07:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:05,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:05,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:05,342 INFO L87 Difference]: Start difference. First operand 1871 states and 7365 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:05,536 INFO L93 Difference]: Finished difference Result 1871 states and 7361 transitions. [2022-11-20 11:07:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:05,541 INFO L225 Difference]: With dead ends: 1871 [2022-11-20 11:07:05,542 INFO L226 Difference]: Without dead ends: 1871 [2022-11-20 11:07:05,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:05,542 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:05,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:07:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-11-20 11:07:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1867. [2022-11-20 11:07:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1856 states have (on average 3.9585129310344827) internal successors, (7347), 1866 states have internal predecessors, (7347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 7347 transitions. [2022-11-20 11:07:05,573 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 7347 transitions. Word has length 11 [2022-11-20 11:07:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:05,573 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 7347 transitions. [2022-11-20 11:07:05,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 7347 transitions. [2022-11-20 11:07:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:05,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:05,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:05,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-20 11:07:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:05,775 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1464206610, now seen corresponding path program 3 times [2022-11-20 11:07:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:05,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085614253] [2022-11-20 11:07:05,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:05,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:05,777 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:05,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:05,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:07:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:06,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:06,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:06,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:06,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085614253] [2022-11-20 11:07:06,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085614253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:06,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:06,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626804766] [2022-11-20 11:07:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:06,346 INFO L87 Difference]: Start difference. First operand 1867 states and 7347 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:06,516 INFO L93 Difference]: Finished difference Result 1867 states and 7339 transitions. [2022-11-20 11:07:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:06,521 INFO L225 Difference]: With dead ends: 1867 [2022-11-20 11:07:06,521 INFO L226 Difference]: Without dead ends: 1867 [2022-11-20 11:07:06,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:06,521 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:06,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 11:07:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-11-20 11:07:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1849. [2022-11-20 11:07:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1838 states have (on average 3.941784548422198) internal successors, (7245), 1848 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 7245 transitions. [2022-11-20 11:07:06,549 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 7245 transitions. Word has length 11 [2022-11-20 11:07:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:06,550 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 7245 transitions. [2022-11-20 11:07:06,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 7245 transitions. [2022-11-20 11:07:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:06,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:06,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:06,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:06,751 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1464233580, now seen corresponding path program 2 times [2022-11-20 11:07:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039529895] [2022-11-20 11:07:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:06,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:06,753 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:06,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:06,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:07:06,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:06,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:07,076 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:07,077 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 17 treesize of output 44 [2022-11-20 11:07:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:07,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:07,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:07,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039529895] [2022-11-20 11:07:07,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039529895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:07,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:07,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108241845] [2022-11-20 11:07:07,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:07,345 INFO L87 Difference]: Start difference. First operand 1849 states and 7245 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:07,505 INFO L93 Difference]: Finished difference Result 1855 states and 7265 transitions. [2022-11-20 11:07:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:07,510 INFO L225 Difference]: With dead ends: 1855 [2022-11-20 11:07:07,510 INFO L226 Difference]: Without dead ends: 1855 [2022-11-20 11:07:07,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:07,511 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:07,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:07:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-11-20 11:07:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1850. [2022-11-20 11:07:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 3.941816204458945) internal successors, (7249), 1849 states have internal predecessors, (7249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 7249 transitions. [2022-11-20 11:07:07,544 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 7249 transitions. Word has length 11 [2022-11-20 11:07:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:07,544 INFO L495 AbstractCegarLoop]: Abstraction has 1850 states and 7249 transitions. [2022-11-20 11:07:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 7249 transitions. [2022-11-20 11:07:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:07,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:07,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:07,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:07,758 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1464489330, now seen corresponding path program 3 times [2022-11-20 11:07:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:07,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827905104] [2022-11-20 11:07:07,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:07,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:07,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:07,760 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:07,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 11:07:07,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:07:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:08,097 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:08,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:08,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:08,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:08,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827905104] [2022-11-20 11:07:08,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827905104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:08,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:08,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054157554] [2022-11-20 11:07:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:08,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:08,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:08,368 INFO L87 Difference]: Start difference. First operand 1850 states and 7249 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:08,555 INFO L93 Difference]: Finished difference Result 1855 states and 7264 transitions. [2022-11-20 11:07:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:08,564 INFO L225 Difference]: With dead ends: 1855 [2022-11-20 11:07:08,564 INFO L226 Difference]: Without dead ends: 1855 [2022-11-20 11:07:08,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:08,565 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:08,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 11:07:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-11-20 11:07:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1850. [2022-11-20 11:07:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 3.941816204458945) internal successors, (7249), 1849 states have internal predecessors, (7249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 7249 transitions. [2022-11-20 11:07:08,617 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 7249 transitions. Word has length 11 [2022-11-20 11:07:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:08,618 INFO L495 AbstractCegarLoop]: Abstraction has 1850 states and 7249 transitions. [2022-11-20 11:07:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 7249 transitions. [2022-11-20 11:07:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:08,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:08,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:08,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:08,833 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1502892750, now seen corresponding path program 4 times [2022-11-20 11:07:08,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:08,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971525475] [2022-11-20 11:07:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:07:08,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:08,836 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:08,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 11:07:09,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:07:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:09,159 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:09,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:09,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:09,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971525475] [2022-11-20 11:07:09,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971525475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:09,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:09,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241153048] [2022-11-20 11:07:09,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:09,426 INFO L87 Difference]: Start difference. First operand 1850 states and 7249 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:09,610 INFO L93 Difference]: Finished difference Result 1855 states and 7264 transitions. [2022-11-20 11:07:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:09,615 INFO L225 Difference]: With dead ends: 1855 [2022-11-20 11:07:09,615 INFO L226 Difference]: Without dead ends: 1855 [2022-11-20 11:07:09,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:09,616 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:09,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:07:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-11-20 11:07:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1851. [2022-11-20 11:07:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1840 states have (on average 3.9413043478260867) internal successors, (7252), 1850 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 7252 transitions. [2022-11-20 11:07:09,662 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 7252 transitions. Word has length 11 [2022-11-20 11:07:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:09,662 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 7252 transitions. [2022-11-20 11:07:09,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 7252 transitions. [2022-11-20 11:07:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:09,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:09,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:09,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:07:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:09,876 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1502887728, now seen corresponding path program 2 times [2022-11-20 11:07:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043743547] [2022-11-20 11:07:09,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:09,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:09,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:09,878 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:09,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 11:07:10,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:07:10,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:10,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:10,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:10,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:10,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:10,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043743547] [2022-11-20 11:07:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043743547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:10,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417505117] [2022-11-20 11:07:10,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:10,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:10,439 INFO L87 Difference]: Start difference. First operand 1851 states and 7252 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:10,657 INFO L93 Difference]: Finished difference Result 1854 states and 7257 transitions. [2022-11-20 11:07:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:10,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:10,663 INFO L225 Difference]: With dead ends: 1854 [2022-11-20 11:07:10,663 INFO L226 Difference]: Without dead ends: 1854 [2022-11-20 11:07:10,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:10,664 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:10,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-20 11:07:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-11-20 11:07:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1851. [2022-11-20 11:07:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1840 states have (on average 3.940760869565217) internal successors, (7251), 1850 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 7251 transitions. [2022-11-20 11:07:10,700 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 7251 transitions. Word has length 11 [2022-11-20 11:07:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:10,700 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 7251 transitions. [2022-11-20 11:07:10,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 7251 transitions. [2022-11-20 11:07:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:10,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:10,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:10,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-20 11:07:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:10,905 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2026077632, now seen corresponding path program 5 times [2022-11-20 11:07:10,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:10,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803665472] [2022-11-20 11:07:10,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:07:10,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:10,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:10,907 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:10,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 11:07:11,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:07:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:11,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:11,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:11,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:11,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:11,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803665472] [2022-11-20 11:07:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803665472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:11,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:11,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:11,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085401430] [2022-11-20 11:07:11,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:11,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:11,498 INFO L87 Difference]: Start difference. First operand 1851 states and 7251 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:11,671 INFO L93 Difference]: Finished difference Result 1865 states and 7297 transitions. [2022-11-20 11:07:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:11,677 INFO L225 Difference]: With dead ends: 1865 [2022-11-20 11:07:11,677 INFO L226 Difference]: Without dead ends: 1865 [2022-11-20 11:07:11,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:11,677 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:11,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-20 11:07:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-11-20 11:07:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1851. [2022-11-20 11:07:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1840 states have (on average 3.940760869565217) internal successors, (7251), 1850 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 7251 transitions. [2022-11-20 11:07:11,709 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 7251 transitions. Word has length 11 [2022-11-20 11:07:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:11,709 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 7251 transitions. [2022-11-20 11:07:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 7251 transitions. [2022-11-20 11:07:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:11,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:11,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:11,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:11,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:11,911 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2026278357, now seen corresponding path program 4 times [2022-11-20 11:07:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:11,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987154932] [2022-11-20 11:07:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:07:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:11,913 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 11:07:12,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:07:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:12,239 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:12,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:12,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:12,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987154932] [2022-11-20 11:07:12,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987154932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:12,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:12,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647910506] [2022-11-20 11:07:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:12,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:12,451 INFO L87 Difference]: Start difference. First operand 1851 states and 7251 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:12,644 INFO L93 Difference]: Finished difference Result 1823 states and 7093 transitions. [2022-11-20 11:07:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:12,649 INFO L225 Difference]: With dead ends: 1823 [2022-11-20 11:07:12,650 INFO L226 Difference]: Without dead ends: 1823 [2022-11-20 11:07:12,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:12,650 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:12,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-20 11:07:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-11-20 11:07:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1823. [2022-11-20 11:07:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1812 states have (on average 3.914459161147903) internal successors, (7093), 1822 states have internal predecessors, (7093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 7093 transitions. [2022-11-20 11:07:12,709 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 7093 transitions. Word has length 11 [2022-11-20 11:07:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:12,710 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 7093 transitions. [2022-11-20 11:07:12,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 7093 transitions. [2022-11-20 11:07:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:12,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:12,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:12,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:12,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:12,924 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:12,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2024844824, now seen corresponding path program 3 times [2022-11-20 11:07:12,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:12,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708692894] [2022-11-20 11:07:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:12,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:12,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:12,925 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:12,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 11:07:13,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:07:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:13,277 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:13,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:13,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:13,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:13,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708692894] [2022-11-20 11:07:13,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708692894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:13,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:13,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778226131] [2022-11-20 11:07:13,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:13,485 INFO L87 Difference]: Start difference. First operand 1823 states and 7093 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:13,681 INFO L93 Difference]: Finished difference Result 1805 states and 6978 transitions. [2022-11-20 11:07:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:13,686 INFO L225 Difference]: With dead ends: 1805 [2022-11-20 11:07:13,686 INFO L226 Difference]: Without dead ends: 1805 [2022-11-20 11:07:13,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:13,687 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:13,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-20 11:07:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-11-20 11:07:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1805. [2022-11-20 11:07:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1794 states have (on average 3.8896321070234112) internal successors, (6978), 1804 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 6978 transitions. [2022-11-20 11:07:13,723 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 6978 transitions. Word has length 11 [2022-11-20 11:07:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:13,724 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 6978 transitions. [2022-11-20 11:07:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 6978 transitions. [2022-11-20 11:07:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:13,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:13,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:13,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 11:07:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:13,935 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2024882303, now seen corresponding path program 1 times [2022-11-20 11:07:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652033144] [2022-11-20 11:07:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:07:13,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:13,937 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:13,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 11:07:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:07:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:07:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:14,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:14,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:07:14,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:14,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652033144] [2022-11-20 11:07:14,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652033144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:14,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:14,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:07:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117678286] [2022-11-20 11:07:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:07:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:14,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:07:14,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:14,543 INFO L87 Difference]: Start difference. First operand 1805 states and 6978 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) 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) [2022-11-20 11:07:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:14,741 INFO L93 Difference]: Finished difference Result 1807 states and 6984 transitions. [2022-11-20 11:07:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:07:14,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) 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 [2022-11-20 11:07:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:14,747 INFO L225 Difference]: With dead ends: 1807 [2022-11-20 11:07:14,747 INFO L226 Difference]: Without dead ends: 1807 [2022-11-20 11:07:14,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:07:14,747 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:14,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-20 11:07:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-11-20 11:07:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2022-11-20 11:07:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1796 states have (on average 3.888641425389755) internal successors, (6984), 1806 states have internal predecessors, (6984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6984 transitions. [2022-11-20 11:07:14,785 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6984 transitions. Word has length 11 [2022-11-20 11:07:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:14,785 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 6984 transitions. [2022-11-20 11:07:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) 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) [2022-11-20 11:07:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6984 transitions. [2022-11-20 11:07:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:14,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:14,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:14,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 11:07:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:14,987 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1848817493, now seen corresponding path program 2 times [2022-11-20 11:07:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843342510] [2022-11-20 11:07:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:14,989 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:14,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 11:07:15,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:07:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:07:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:07:15,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:15,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843342510] [2022-11-20 11:07:15,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843342510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:15,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:15,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928241971] [2022-11-20 11:07:15,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:15,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:15,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:15,270 INFO L87 Difference]: Start difference. First operand 1807 states and 6984 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:15,634 INFO L93 Difference]: Finished difference Result 1759 states and 6739 transitions. [2022-11-20 11:07:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:07:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:15,639 INFO L225 Difference]: With dead ends: 1759 [2022-11-20 11:07:15,639 INFO L226 Difference]: Without dead ends: 1759 [2022-11-20 11:07:15,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:07:15,639 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:15,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 13 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:07:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-20 11:07:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1717. [2022-11-20 11:07:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1706 states have (on average 3.884525205158265) internal successors, (6627), 1716 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6627 transitions. [2022-11-20 11:07:15,669 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6627 transitions. Word has length 11 [2022-11-20 11:07:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:15,669 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 6627 transitions. [2022-11-20 11:07:15,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6627 transitions. [2022-11-20 11:07:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:15,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:15,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:15,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-20 11:07:15,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:15,871 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1602307322, now seen corresponding path program 6 times [2022-11-20 11:07:15,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:15,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499139198] [2022-11-20 11:07:15,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:07:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:15,873 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:15,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 11:07:16,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 11:07:16,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:16,223 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:16,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:16,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:16,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499139198] [2022-11-20 11:07:16,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499139198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:16,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:16,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:16,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823302287] [2022-11-20 11:07:16,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:16,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:16,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:16,519 INFO L87 Difference]: Start difference. First operand 1717 states and 6627 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:16,692 INFO L93 Difference]: Finished difference Result 1719 states and 6631 transitions. [2022-11-20 11:07:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:16,697 INFO L225 Difference]: With dead ends: 1719 [2022-11-20 11:07:16,697 INFO L226 Difference]: Without dead ends: 1719 [2022-11-20 11:07:16,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:16,698 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:16,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:07:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-20 11:07:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1716. [2022-11-20 11:07:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1705 states have (on average 3.8838709677419354) internal successors, (6622), 1715 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 6622 transitions. [2022-11-20 11:07:16,731 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 6622 transitions. Word has length 11 [2022-11-20 11:07:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:16,731 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 6622 transitions. [2022-11-20 11:07:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 6622 transitions. [2022-11-20 11:07:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:07:16,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:16,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:16,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:16,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:16,933 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1602312344, now seen corresponding path program 4 times [2022-11-20 11:07:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:16,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387335694] [2022-11-20 11:07:16,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:07:16,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:16,935 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:16,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 11:07:17,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:07:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:07:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:17,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:17,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:17,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:17,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387335694] [2022-11-20 11:07:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387335694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:17,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:17,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:07:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660703265] [2022-11-20 11:07:17,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:17,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:17,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:17,501 INFO L87 Difference]: Start difference. First operand 1716 states and 6622 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:17,727 INFO L93 Difference]: Finished difference Result 1712 states and 6607 transitions. [2022-11-20 11:07:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:07:17,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:07:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:17,732 INFO L225 Difference]: With dead ends: 1712 [2022-11-20 11:07:17,732 INFO L226 Difference]: Without dead ends: 1712 [2022-11-20 11:07:17,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:07:17,732 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-20 11:07:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-20 11:07:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1710. [2022-11-20 11:07:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1699 states have (on average 3.8864037669217186) internal successors, (6603), 1709 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 6603 transitions. [2022-11-20 11:07:17,775 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 6603 transitions. Word has length 11 [2022-11-20 11:07:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:17,775 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 6603 transitions. [2022-11-20 11:07:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 6603 transitions. [2022-11-20 11:07:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:07:17,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:17,777 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 11:07:17,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:07:17,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:17,977 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1471853359, now seen corresponding path program 3 times [2022-11-20 11:07:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039069873] [2022-11-20 11:07:17,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:17,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:17,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:17,979 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:17,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 11:07:18,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:07:18,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:07:18,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:18,438 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:18,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:19,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:07:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:22,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:22,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039069873] [2022-11-20 11:07:22,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039069873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:07:22,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:07:22,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:07:22,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389743028] [2022-11-20 11:07:22,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:07:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:07:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:07:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:07:22,694 INFO L87 Difference]: Start difference. First operand 1710 states and 6603 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:49,442 INFO L93 Difference]: Finished difference Result 13298 states and 52747 transitions. [2022-11-20 11:07:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:07:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:07:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:49,487 INFO L225 Difference]: With dead ends: 13298 [2022-11-20 11:07:49,488 INFO L226 Difference]: Without dead ends: 13298 [2022-11-20 11:07:49,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:07:49,488 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3475 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:49,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 393 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-11-20 11:07:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13298 states. [2022-11-20 11:07:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13298 to 1722. [2022-11-20 11:07:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1711 states have (on average 3.873173582700175) internal successors, (6627), 1721 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 6627 transitions. [2022-11-20 11:07:49,608 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 6627 transitions. Word has length 12 [2022-11-20 11:07:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:49,608 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 6627 transitions. [2022-11-20 11:07:49,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 6627 transitions. [2022-11-20 11:07:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:07:49,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:49,610 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:49,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:07:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:49,815 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -916542670, now seen corresponding path program 2 times [2022-11-20 11:07:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337003983] [2022-11-20 11:07:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:07:49,816 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 [2022-11-20 11:07:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:49,817 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:49,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 11:07:50,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:07:50,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:07:50,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:50,167 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:50,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:07:50,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:07:50,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:50,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337003983] [2022-11-20 11:07:50,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337003983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:07:50,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:07:50,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:07:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104409994] [2022-11-20 11:07:50,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:07:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:07:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:07:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:07:50,419 INFO L87 Difference]: Start difference. First operand 1722 states and 6627 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:07:50,849 INFO L93 Difference]: Finished difference Result 1562 states and 5963 transitions. [2022-11-20 11:07:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:07:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:07:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:07:50,854 INFO L225 Difference]: With dead ends: 1562 [2022-11-20 11:07:50,854 INFO L226 Difference]: Without dead ends: 1562 [2022-11-20 11:07:50,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:07:50,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:07:50,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:07:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-11-20 11:07:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1234. [2022-11-20 11:07:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1227 states have (on average 3.797881010594947) internal successors, (4660), 1233 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4660 transitions. [2022-11-20 11:07:50,875 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4660 transitions. Word has length 12 [2022-11-20 11:07:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:07:50,876 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 4660 transitions. [2022-11-20 11:07:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:07:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4660 transitions. [2022-11-20 11:07:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:07:50,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:07:50,877 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:07:50,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-20 11:07:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:51,077 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:07:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:07:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1601092607, now seen corresponding path program 3 times [2022-11-20 11:07:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:07:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921697712] [2022-11-20 11:07:51,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:07:51,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:07:51,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:07:51,079 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:07:51,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 11:07:51,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:07:51,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:07:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:07:51,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:07:51,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:07:51,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:07:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:51,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:07:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:07:52,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:07:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921697712] [2022-11-20 11:07:52,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921697712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:07:52,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:07:52,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:07:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452419209] [2022-11-20 11:07:52,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:07:52,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:07:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:07:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:07:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:07:52,904 INFO L87 Difference]: Start difference. First operand 1234 states and 4660 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:00,662 INFO L93 Difference]: Finished difference Result 1703 states and 5724 transitions. [2022-11-20 11:08:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:08:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:08:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:00,667 INFO L225 Difference]: With dead ends: 1703 [2022-11-20 11:08:00,667 INFO L226 Difference]: Without dead ends: 1703 [2022-11-20 11:08:00,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:08:00,668 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 377 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:00,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 174 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 696 Invalid, 0 Unknown, 178 Unchecked, 5.1s Time] [2022-11-20 11:08:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-11-20 11:08:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1325. [2022-11-20 11:08:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1318 states have (on average 3.7397572078907437) internal successors, (4929), 1324 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4929 transitions. [2022-11-20 11:08:00,691 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4929 transitions. Word has length 12 [2022-11-20 11:08:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:00,691 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 4929 transitions. [2022-11-20 11:08:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4929 transitions. [2022-11-20 11:08:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:00,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:00,692 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-20 11:08:00,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-20 11:08:00,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:00,892 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1854207650, now seen corresponding path program 3 times [2022-11-20 11:08:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:00,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600641678] [2022-11-20 11:08:00,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:08:00,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:00,894 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:00,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 11:08:01,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:08:01,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:08:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:08:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:01,368 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:01,369 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:08:01,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:08:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:08:01,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:08:02,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:02,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600641678] [2022-11-20 11:08:02,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600641678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:02,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:02,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:08:02,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084975600] [2022-11-20 11:08:02,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:02,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:08:02,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:08:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:08:02,044 INFO L87 Difference]: Start difference. First operand 1325 states and 4929 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 11:08:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:05,408 INFO L93 Difference]: Finished difference Result 1741 states and 6307 transitions. [2022-11-20 11:08:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:08:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 12 [2022-11-20 11:08:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:05,413 INFO L225 Difference]: With dead ends: 1741 [2022-11-20 11:08:05,413 INFO L226 Difference]: Without dead ends: 1741 [2022-11-20 11:08:05,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:08:05,414 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 399 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:05,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 169 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 11:08:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-20 11:08:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1550. [2022-11-20 11:08:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1543 states have (on average 3.7874270900842513) internal successors, (5844), 1549 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5844 transitions. [2022-11-20 11:08:05,455 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5844 transitions. Word has length 12 [2022-11-20 11:08:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:05,455 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 5844 transitions. [2022-11-20 11:08:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 11:08:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5844 transitions. [2022-11-20 11:08:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:05,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:05,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:05,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:08:05,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:05,657 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:05,657 INFO L85 PathProgramCache]: Analyzing trace with hash -424085304, now seen corresponding path program 1 times [2022-11-20 11:08:05,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:05,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854663405] [2022-11-20 11:08:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:05,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:05,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:05,659 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:05,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 11:08:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:08:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:06,019 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:06,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:08:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:06,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:07,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854663405] [2022-11-20 11:08:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854663405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:07,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:07,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:08:07,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266900101] [2022-11-20 11:08:07,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:08:07,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:08:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:08:07,021 INFO L87 Difference]: Start difference. First operand 1550 states and 5844 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) [2022-11-20 11:08:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:07,604 INFO L93 Difference]: Finished difference Result 1765 states and 6721 transitions. [2022-11-20 11:08:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:08:07,606 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 [2022-11-20 11:08:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:07,610 INFO L225 Difference]: With dead ends: 1765 [2022-11-20 11:08:07,611 INFO L226 Difference]: Without dead ends: 1765 [2022-11-20 11:08:07,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:07,611 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:07,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-20 11:08:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-11-20 11:08:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1645. [2022-11-20 11:08:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1638 states have (on average 3.8333333333333335) internal successors, (6279), 1644 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 6279 transitions. [2022-11-20 11:08:07,660 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 6279 transitions. Word has length 12 [2022-11-20 11:08:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:07,660 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 6279 transitions. [2022-11-20 11:08:07,660 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) [2022-11-20 11:08:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 6279 transitions. [2022-11-20 11:08:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:07,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:07,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:07,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-20 11:08:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:07,862 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -424048104, now seen corresponding path program 2 times [2022-11-20 11:08:07,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:07,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658847193] [2022-11-20 11:08:07,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:08:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:07,864 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:07,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 11:08:08,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:08:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:08:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:08:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:08,248 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:08,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:08:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:09,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658847193] [2022-11-20 11:08:09,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658847193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:09,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:09,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:08:09,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705534091] [2022-11-20 11:08:09,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:08:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:08:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:08:09,139 INFO L87 Difference]: Start difference. First operand 1645 states and 6279 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) [2022-11-20 11:08:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:09,395 INFO L93 Difference]: Finished difference Result 1699 states and 6491 transitions. [2022-11-20 11:08:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:08:09,396 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 [2022-11-20 11:08:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:09,400 INFO L225 Difference]: With dead ends: 1699 [2022-11-20 11:08:09,400 INFO L226 Difference]: Without dead ends: 1699 [2022-11-20 11:08:09,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:09,400 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:09,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-20 11:08:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-20 11:08:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1645. [2022-11-20 11:08:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1638 states have (on average 3.8321123321123323) internal successors, (6277), 1644 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 6277 transitions. [2022-11-20 11:08:09,427 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 6277 transitions. Word has length 12 [2022-11-20 11:08:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:09,428 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 6277 transitions. [2022-11-20 11:08:09,428 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) [2022-11-20 11:08:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 6277 transitions. [2022-11-20 11:08:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:09,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:09,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:09,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-20 11:08:09,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:09,630 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash -424052475, now seen corresponding path program 1 times [2022-11-20 11:08:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:09,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348375413] [2022-11-20 11:08:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:09,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:09,631 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:09,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 11:08:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:09,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:08:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:10,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:10,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:08:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:10,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:10,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348375413] [2022-11-20 11:08:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348375413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:10,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:10,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:08:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256688028] [2022-11-20 11:08:10,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:08:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:08:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:08:10,979 INFO L87 Difference]: Start difference. First operand 1645 states and 6277 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) [2022-11-20 11:08:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:11,481 INFO L93 Difference]: Finished difference Result 1805 states and 6945 transitions. [2022-11-20 11:08:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-20 11:08:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:51,990 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:51,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 11:08:52,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:08:52,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:08:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:08:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:52,475 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:52,475 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 [2022-11-20 11:08:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:52,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:08:53,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:53,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973911416] [2022-11-20 11:08:53,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973911416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:53,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:53,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:08:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150711981] [2022-11-20 11:08:53,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:08:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:08:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:08:53,373 INFO L87 Difference]: Start difference. First operand 2053 states and 8238 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) [2022-11-20 11:08:54,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:54,250 INFO L93 Difference]: Finished difference Result 2625 states and 11006 transitions. [2022-11-20 11:08:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:08:54,252 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 [2022-11-20 11:08:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:54,258 INFO L225 Difference]: With dead ends: 2625 [2022-11-20 11:08:54,258 INFO L226 Difference]: Without dead ends: 2625 [2022-11-20 11:08:54,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:54,259 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:54,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 171 Unchecked, 0.8s Time] [2022-11-20 11:08:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2022-11-20 11:08:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2191. [2022-11-20 11:08:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2184 states have (on average 4.128663003663004) internal successors, (9017), 2190 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 9017 transitions. [2022-11-20 11:08:54,304 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 9017 transitions. Word has length 12 [2022-11-20 11:08:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:54,304 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 9017 transitions. [2022-11-20 11:08:54,304 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) [2022-11-20 11:08:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 9017 transitions. [2022-11-20 11:08:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:54,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:54,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:54,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-20 11:08:54,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:54,506 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1587182856, now seen corresponding path program 5 times [2022-11-20 11:08:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677922970] [2022-11-20 11:08:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:08:54,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:54,508 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:54,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:08:54,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:08:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:08:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:08:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:54,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:54,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:08:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:55,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:56,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677922970] [2022-11-20 11:08:56,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677922970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:56,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:56,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:08:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798474687] [2022-11-20 11:08:56,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:08:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:08:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:08:56,123 INFO L87 Difference]: Start difference. First operand 2191 states and 9017 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) [2022-11-20 11:08:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:58,857 INFO L93 Difference]: Finished difference Result 3042 states and 11980 transitions. [2022-11-20 11:08:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:08:58,858 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 [2022-11-20 11:08:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:58,866 INFO L225 Difference]: With dead ends: 3042 [2022-11-20 11:08:58,866 INFO L226 Difference]: Without dead ends: 3042 [2022-11-20 11:08:58,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:08:58,866 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 179 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 37 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 250 Unchecked, 1.5s Time] [2022-11-20 11:08:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-20 11:08:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2250. [2022-11-20 11:08:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2243 states have (on average 4.113687026304057) internal successors, (9227), 2249 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 9227 transitions. [2022-11-20 11:08:58,915 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 9227 transitions. Word has length 12 [2022-11-20 11:08:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:58,915 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 9227 transitions. [2022-11-20 11:08:58,915 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) [2022-11-20 11:08:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 9227 transitions. [2022-11-20 11:08:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:58,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:58,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:58,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-20 11:08:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:59,117 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:08:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1997229126, now seen corresponding path program 1 times [2022-11-20 11:08:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:08:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267707062] [2022-11-20 11:08:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:08:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:08:59,119 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:08:59,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:08:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:08:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:59,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:08:59,493 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 17 treesize of output 44 [2022-11-20 11:08:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:59,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:08:59,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:08:59,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267707062] [2022-11-20 11:08:59,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267707062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:59,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:59,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:08:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10167190] [2022-11-20 11:08:59,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:08:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:08:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:08:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:08:59,781 INFO L87 Difference]: Start difference. First operand 2250 states and 9227 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:59,929 INFO L93 Difference]: Finished difference Result 2344 states and 9670 transitions. [2022-11-20 11:08:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:08:59,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:08:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:59,936 INFO L225 Difference]: With dead ends: 2344 [2022-11-20 11:08:59,936 INFO L226 Difference]: Without dead ends: 2344 [2022-11-20 11:08:59,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:08:59,936 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:59,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 11:08:59,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-20 11:08:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2254. [2022-11-20 11:08:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2247 states have (on average 4.111704494882065) internal successors, (9239), 2253 states have internal predecessors, (9239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 9239 transitions. [2022-11-20 11:08:59,995 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 9239 transitions. Word has length 12 [2022-11-20 11:08:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:59,995 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 9239 transitions. [2022-11-20 11:08:59,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 9239 transitions. [2022-11-20 11:08:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:08:59,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:59,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:00,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:00,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:00,197 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1997378856, now seen corresponding path program 2 times [2022-11-20 11:09:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:00,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569915254] [2022-11-20 11:09:00,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:00,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:00,199 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:00,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 11:09:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:00,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:00,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:00,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:00,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:00,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569915254] [2022-11-20 11:09:00,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569915254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:00,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:00,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090829062] [2022-11-20 11:09:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:00,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:00,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:00,858 INFO L87 Difference]: Start difference. First operand 2254 states and 9239 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:01,016 INFO L93 Difference]: Finished difference Result 2386 states and 9809 transitions. [2022-11-20 11:09:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:01,026 INFO L225 Difference]: With dead ends: 2386 [2022-11-20 11:09:01,026 INFO L226 Difference]: Without dead ends: 2386 [2022-11-20 11:09:01,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:01,027 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:01,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 11:09:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-11-20 11:09:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2238. [2022-11-20 11:09:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2231 states have (on average 4.11967727476468) internal successors, (9191), 2237 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 9191 transitions. [2022-11-20 11:09:01,098 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 9191 transitions. Word has length 12 [2022-11-20 11:09:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:01,098 INFO L495 AbstractCegarLoop]: Abstraction has 2238 states and 9191 transitions. [2022-11-20 11:09:01,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 9191 transitions. [2022-11-20 11:09:01,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:01,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:01,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:01,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:01,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:01,300 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1996825506, now seen corresponding path program 3 times [2022-11-20 11:09:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004950362] [2022-11-20 11:09:01,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:09:01,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:01,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:01,302 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:01,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:01,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:09:01,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:01,692 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:01,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:01,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:01,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004950362] [2022-11-20 11:09:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004950362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:01,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:01,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:01,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063391458] [2022-11-20 11:09:01,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:01,968 INFO L87 Difference]: Start difference. First operand 2238 states and 9191 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:02,124 INFO L93 Difference]: Finished difference Result 2302 states and 9456 transitions. [2022-11-20 11:09:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:02,130 INFO L225 Difference]: With dead ends: 2302 [2022-11-20 11:09:02,130 INFO L226 Difference]: Without dead ends: 2302 [2022-11-20 11:09:02,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:02,131 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:02,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 11:09:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2022-11-20 11:09:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 2240. [2022-11-20 11:09:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2233 states have (on average 4.118674429019257) internal successors, (9197), 2239 states have internal predecessors, (9197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 9197 transitions. [2022-11-20 11:09:02,195 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 9197 transitions. Word has length 12 [2022-11-20 11:09:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:02,196 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 9197 transitions. [2022-11-20 11:09:02,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 9197 transitions. [2022-11-20 11:09:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:02,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:02,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:02,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:09:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:02,398 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1996798536, now seen corresponding path program 1 times [2022-11-20 11:09:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:02,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498180116] [2022-11-20 11:09:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:02,399 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:02,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:02,804 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 [2022-11-20 11:09:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:03,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:03,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498180116] [2022-11-20 11:09:03,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498180116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:03,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423138401] [2022-11-20 11:09:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:03,106 INFO L87 Difference]: Start difference. First operand 2240 states and 9197 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:03,256 INFO L93 Difference]: Finished difference Result 2250 states and 9235 transitions. [2022-11-20 11:09:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:03,262 INFO L225 Difference]: With dead ends: 2250 [2022-11-20 11:09:03,262 INFO L226 Difference]: Without dead ends: 2250 [2022-11-20 11:09:03,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:03,263 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:03,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:09:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-11-20 11:09:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2241. [2022-11-20 11:09:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2234 states have (on average 4.118621307072516) internal successors, (9201), 2240 states have internal predecessors, (9201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 9201 transitions. [2022-11-20 11:09:03,335 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 9201 transitions. Word has length 12 [2022-11-20 11:09:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:03,335 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 9201 transitions. [2022-11-20 11:09:03,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 9201 transitions. [2022-11-20 11:09:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:03,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:03,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:03,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:03,537 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1996542786, now seen corresponding path program 2 times [2022-11-20 11:09:03,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103136164] [2022-11-20 11:09:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:03,538 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 [2022-11-20 11:09:03,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:03,539 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:03,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-20 11:09:03,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:03,933 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:03,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:04,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:04,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103136164] [2022-11-20 11:09:04,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103136164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:04,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:04,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:04,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307886818] [2022-11-20 11:09:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:04,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:04,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:04,226 INFO L87 Difference]: Start difference. First operand 2241 states and 9201 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:04,396 INFO L93 Difference]: Finished difference Result 2250 states and 9232 transitions. [2022-11-20 11:09:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:04,403 INFO L225 Difference]: With dead ends: 2250 [2022-11-20 11:09:04,403 INFO L226 Difference]: Without dead ends: 2250 [2022-11-20 11:09:04,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:04,403 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:04,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:09:04,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-11-20 11:09:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2242. [2022-11-20 11:09:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2235 states have (on average 4.118568232662192) internal successors, (9205), 2241 states have internal predecessors, (9205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 9205 transitions. [2022-11-20 11:09:04,480 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 9205 transitions. Word has length 12 [2022-11-20 11:09:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:04,480 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 9205 transitions. [2022-11-20 11:09:04,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 9205 transitions. [2022-11-20 11:09:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:04,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:04,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:04,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:04,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:04,683 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:04,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1866744546, now seen corresponding path program 4 times [2022-11-20 11:09:04,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732157689] [2022-11-20 11:09:04,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:04,685 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:04,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:04,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:05,098 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:05,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:05,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:05,390 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:05,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732157689] [2022-11-20 11:09:05,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732157689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:05,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:05,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116719911] [2022-11-20 11:09:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:05,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:05,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:05,392 INFO L87 Difference]: Start difference. First operand 2242 states and 9205 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:05,535 INFO L93 Difference]: Finished difference Result 2302 states and 9488 transitions. [2022-11-20 11:09:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:05,542 INFO L225 Difference]: With dead ends: 2302 [2022-11-20 11:09:05,542 INFO L226 Difference]: Without dead ends: 2302 [2022-11-20 11:09:05,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:05,542 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:05,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-20 11:09:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2022-11-20 11:09:05,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 2238. [2022-11-20 11:09:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2231 states have (on average 4.115194979829673) internal successors, (9181), 2237 states have internal predecessors, (9181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 9181 transitions. [2022-11-20 11:09:05,584 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 9181 transitions. Word has length 12 [2022-11-20 11:09:05,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:05,584 INFO L495 AbstractCegarLoop]: Abstraction has 2238 states and 9181 transitions. [2022-11-20 11:09:05,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:05,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 9181 transitions. [2022-11-20 11:09:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:05,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:05,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:05,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:05,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:05,786 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:05,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1866582075, now seen corresponding path program 1 times [2022-11-20 11:09:05,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:05,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588585694] [2022-11-20 11:09:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:05,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:05,788 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:05,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:06,206 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:06,206 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 [2022-11-20 11:09:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:06,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:06,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588585694] [2022-11-20 11:09:06,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588585694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:06,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:06,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:06,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211832499] [2022-11-20 11:09:06,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:06,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:06,516 INFO L87 Difference]: Start difference. First operand 2238 states and 9181 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:06,658 INFO L93 Difference]: Finished difference Result 2271 states and 9359 transitions. [2022-11-20 11:09:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:06,665 INFO L225 Difference]: With dead ends: 2271 [2022-11-20 11:09:06,665 INFO L226 Difference]: Without dead ends: 2271 [2022-11-20 11:09:06,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:06,666 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:06,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 11:09:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-11-20 11:09:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2239. [2022-11-20 11:09:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2232 states have (on average 4.115143369175628) internal successors, (9185), 2238 states have internal predecessors, (9185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:06,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 9185 transitions. [2022-11-20 11:09:06,705 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 9185 transitions. Word has length 12 [2022-11-20 11:09:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:06,705 INFO L495 AbstractCegarLoop]: Abstraction has 2239 states and 9185 transitions. [2022-11-20 11:09:06,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 9185 transitions. [2022-11-20 11:09:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:06,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:06,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:06,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:06,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:06,911 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1871391756, now seen corresponding path program 5 times [2022-11-20 11:09:06,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353965038] [2022-11-20 11:09:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:09:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:06,912 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:06,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-20 11:09:07,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:07,312 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:07,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:07,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:07,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353965038] [2022-11-20 11:09:07,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353965038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:07,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:07,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479552393] [2022-11-20 11:09:07,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:07,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:07,597 INFO L87 Difference]: Start difference. First operand 2239 states and 9185 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:07,737 INFO L93 Difference]: Finished difference Result 2344 states and 9631 transitions. [2022-11-20 11:09:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:07,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:07,744 INFO L225 Difference]: With dead ends: 2344 [2022-11-20 11:09:07,744 INFO L226 Difference]: Without dead ends: 2344 [2022-11-20 11:09:07,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:07,744 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:07,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:09:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-20 11:09:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2215. [2022-11-20 11:09:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2208 states have (on average 4.120018115942029) internal successors, (9097), 2214 states have internal predecessors, (9097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 9097 transitions. [2022-11-20 11:09:07,800 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 9097 transitions. Word has length 12 [2022-11-20 11:09:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 2215 states and 9097 transitions. [2022-11-20 11:09:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 9097 transitions. [2022-11-20 11:09:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:07,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:07,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:07,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-20 11:09:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:08,002 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1866326325, now seen corresponding path program 2 times [2022-11-20 11:09:08,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:08,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026454137] [2022-11-20 11:09:08,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:08,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:08,004 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:08,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:08,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:08,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:08,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:08,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:08,405 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 [2022-11-20 11:09:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:08,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:08,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026454137] [2022-11-20 11:09:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026454137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:08,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:08,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545683089] [2022-11-20 11:09:08,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:08,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:08,712 INFO L87 Difference]: Start difference. First operand 2215 states and 9097 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:08,855 INFO L93 Difference]: Finished difference Result 2247 states and 9268 transitions. [2022-11-20 11:09:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:08,861 INFO L225 Difference]: With dead ends: 2247 [2022-11-20 11:09:08,861 INFO L226 Difference]: Without dead ends: 2247 [2022-11-20 11:09:08,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:08,862 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:08,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:09:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-11-20 11:09:08,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2216. [2022-11-20 11:09:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2209 states have (on average 4.119963784517881) internal successors, (9101), 2215 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 9101 transitions. [2022-11-20 11:09:08,900 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 9101 transitions. Word has length 12 [2022-11-20 11:09:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:08,901 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 9101 transitions. [2022-11-20 11:09:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 9101 transitions. [2022-11-20 11:09:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:08,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:08,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:08,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:09,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:09,103 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:09,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1858297356, now seen corresponding path program 6 times [2022-11-20 11:09:09,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:09,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324193578] [2022-11-20 11:09:09,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:09:09,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:09,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:09,104 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:09,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:09,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 11:09:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:09,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:09,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:09,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:09,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:09,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:09,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324193578] [2022-11-20 11:09:09,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324193578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:09,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:09,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52494803] [2022-11-20 11:09:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:09,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:09,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:09,812 INFO L87 Difference]: Start difference. First operand 2216 states and 9101 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:09,987 INFO L93 Difference]: Finished difference Result 2250 states and 9252 transitions. [2022-11-20 11:09:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:09,994 INFO L225 Difference]: With dead ends: 2250 [2022-11-20 11:09:09,994 INFO L226 Difference]: Without dead ends: 2250 [2022-11-20 11:09:09,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:09,994 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:09,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:09:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2022-11-20 11:09:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2210. [2022-11-20 11:09:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2203 states have (on average 4.12119836586473) internal successors, (9079), 2209 states have internal predecessors, (9079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 9079 transitions. [2022-11-20 11:09:10,040 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 9079 transitions. Word has length 12 [2022-11-20 11:09:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:10,040 INFO L495 AbstractCegarLoop]: Abstraction has 2210 states and 9079 transitions. [2022-11-20 11:09:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 9079 transitions. [2022-11-20 11:09:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:10,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:10,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:10,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:10,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:10,243 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1858270386, now seen corresponding path program 3 times [2022-11-20 11:09:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145171482] [2022-11-20 11:09:10,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:09:10,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:10,245 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:10,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 11:09:10,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:09:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:10,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:10,638 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 [2022-11-20 11:09:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:10,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:10,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:10,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145171482] [2022-11-20 11:09:10,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145171482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:10,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:10,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:10,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935011909] [2022-11-20 11:09:10,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:10,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:10,940 INFO L87 Difference]: Start difference. First operand 2210 states and 9079 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:11,093 INFO L93 Difference]: Finished difference Result 2217 states and 9105 transitions. [2022-11-20 11:09:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:11,100 INFO L225 Difference]: With dead ends: 2217 [2022-11-20 11:09:11,100 INFO L226 Difference]: Without dead ends: 2217 [2022-11-20 11:09:11,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:11,100 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:11,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 11:09:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2022-11-20 11:09:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2209. [2022-11-20 11:09:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2202 states have (on average 4.1221616712079925) internal successors, (9077), 2208 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9077 transitions. [2022-11-20 11:09:11,138 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9077 transitions. Word has length 12 [2022-11-20 11:09:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:11,139 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 9077 transitions. [2022-11-20 11:09:11,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9077 transitions. [2022-11-20 11:09:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:11,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:11,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:11,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:11,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:11,341 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1854069855, now seen corresponding path program 3 times [2022-11-20 11:09:11,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:11,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457953110] [2022-11-20 11:09:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:09:11,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:11,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:11,342 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:11,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:09:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:11,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:11,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:11,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:12,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:12,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457953110] [2022-11-20 11:09:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457953110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:12,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:12,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299274978] [2022-11-20 11:09:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:12,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:12,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:12,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:12,028 INFO L87 Difference]: Start difference. First operand 2209 states and 9077 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:12,180 INFO L93 Difference]: Finished difference Result 2222 states and 9143 transitions. [2022-11-20 11:09:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:12,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:12,187 INFO L225 Difference]: With dead ends: 2222 [2022-11-20 11:09:12,187 INFO L226 Difference]: Without dead ends: 2222 [2022-11-20 11:09:12,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:12,187 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:12,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 11:09:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-11-20 11:09:12,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2207. [2022-11-20 11:09:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2200 states have (on average 4.122272727272727) internal successors, (9069), 2206 states have internal predecessors, (9069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 9069 transitions. [2022-11-20 11:09:12,246 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 9069 transitions. Word has length 12 [2022-11-20 11:09:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:12,246 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 9069 transitions. [2022-11-20 11:09:12,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 9069 transitions. [2022-11-20 11:09:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:12,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:12,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:12,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:09:12,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:12,448 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1845473586, now seen corresponding path program 4 times [2022-11-20 11:09:12,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:12,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204441951] [2022-11-20 11:09:12,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:12,450 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:12,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:12,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:12,854 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:12,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:13,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:13,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204441951] [2022-11-20 11:09:13,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204441951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:13,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:13,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:13,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289772451] [2022-11-20 11:09:13,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:13,146 INFO L87 Difference]: Start difference. First operand 2207 states and 9069 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:13,300 INFO L93 Difference]: Finished difference Result 2218 states and 9108 transitions. [2022-11-20 11:09:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:13,306 INFO L225 Difference]: With dead ends: 2218 [2022-11-20 11:09:13,306 INFO L226 Difference]: Without dead ends: 2218 [2022-11-20 11:09:13,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:13,307 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:13,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 11:09:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-11-20 11:09:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2209. [2022-11-20 11:09:13,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2202 states have (on average 4.1221616712079925) internal successors, (9077), 2208 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9077 transitions. [2022-11-20 11:09:13,345 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9077 transitions. Word has length 12 [2022-11-20 11:09:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:13,346 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 9077 transitions. [2022-11-20 11:09:13,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9077 transitions. [2022-11-20 11:09:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:13,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:13,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:13,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:13,548 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1845469215, now seen corresponding path program 4 times [2022-11-20 11:09:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874847291] [2022-11-20 11:09:13,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:13,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:13,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:13,550 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:13,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-20 11:09:13,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:13,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:13,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:13,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:14,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:14,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:14,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874847291] [2022-11-20 11:09:14,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874847291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:14,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:14,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:14,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965540096] [2022-11-20 11:09:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:14,322 INFO L87 Difference]: Start difference. First operand 2209 states and 9077 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:14,499 INFO L93 Difference]: Finished difference Result 2224 states and 9134 transitions. [2022-11-20 11:09:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:14,508 INFO L225 Difference]: With dead ends: 2224 [2022-11-20 11:09:14,508 INFO L226 Difference]: Without dead ends: 2224 [2022-11-20 11:09:14,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:14,508 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:14,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:09:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-11-20 11:09:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2213. [2022-11-20 11:09:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2206 states have (on average 4.121033544877607) internal successors, (9091), 2212 states have internal predecessors, (9091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 9091 transitions. [2022-11-20 11:09:14,566 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 9091 transitions. Word has length 12 [2022-11-20 11:09:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:14,566 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 9091 transitions. [2022-11-20 11:09:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:14,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 9091 transitions. [2022-11-20 11:09:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:14,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:14,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:14,770 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash 654967566, now seen corresponding path program 5 times [2022-11-20 11:09:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:14,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486812101] [2022-11-20 11:09:14,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:09:14,771 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 [2022-11-20 11:09:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:14,775 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:14,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:15,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:15,182 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:15,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:15,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486812101] [2022-11-20 11:09:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486812101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:15,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:15,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211688275] [2022-11-20 11:09:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:15,467 INFO L87 Difference]: Start difference. First operand 2213 states and 9091 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:15,633 INFO L93 Difference]: Finished difference Result 2221 states and 9119 transitions. [2022-11-20 11:09:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:15,641 INFO L225 Difference]: With dead ends: 2221 [2022-11-20 11:09:15,641 INFO L226 Difference]: Without dead ends: 2221 [2022-11-20 11:09:15,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:15,642 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:15,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:09:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2022-11-20 11:09:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2217. [2022-11-20 11:09:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2210 states have (on average 4.119004524886877) internal successors, (9103), 2216 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 9103 transitions. [2022-11-20 11:09:15,683 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 9103 transitions. Word has length 12 [2022-11-20 11:09:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:15,684 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 9103 transitions. [2022-11-20 11:09:15,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 9103 transitions. [2022-11-20 11:09:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:15,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:15,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:15,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:09:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:15,886 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:15,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 654963195, now seen corresponding path program 5 times [2022-11-20 11:09:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:15,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803217997] [2022-11-20 11:09:15,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:09:15,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:15,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:15,888 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:15,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:16,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:16,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:16,310 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:16,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:16,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:16,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:16,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803217997] [2022-11-20 11:09:16,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803217997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:16,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:16,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185480262] [2022-11-20 11:09:16,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:16,592 INFO L87 Difference]: Start difference. First operand 2217 states and 9103 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:16,753 INFO L93 Difference]: Finished difference Result 2229 states and 9167 transitions. [2022-11-20 11:09:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:16,759 INFO L225 Difference]: With dead ends: 2229 [2022-11-20 11:09:16,759 INFO L226 Difference]: Without dead ends: 2229 [2022-11-20 11:09:16,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:16,760 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:16,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 11:09:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2022-11-20 11:09:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 2216. [2022-11-20 11:09:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2209 states have (on average 4.119058397464916) internal successors, (9099), 2215 states have internal predecessors, (9099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 9099 transitions. [2022-11-20 11:09:16,801 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 9099 transitions. Word has length 12 [2022-11-20 11:09:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:16,801 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 9099 transitions. [2022-11-20 11:09:16,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 9099 transitions. [2022-11-20 11:09:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:09:16,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:16,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:16,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:17,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:17,016 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1868078010, now seen corresponding path program 6 times [2022-11-20 11:09:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231066339] [2022-11-20 11:09:17,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:09:17,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:17,017 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:17,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-20 11:09:17,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 11:09:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:17,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:17,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:17,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:17,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231066339] [2022-11-20 11:09:17,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231066339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:17,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:17,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:17,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789337472] [2022-11-20 11:09:17,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:17,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:17,751 INFO L87 Difference]: Start difference. First operand 2216 states and 9099 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:17,939 INFO L93 Difference]: Finished difference Result 2231 states and 9138 transitions. [2022-11-20 11:09:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:09:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:17,946 INFO L225 Difference]: With dead ends: 2231 [2022-11-20 11:09:17,946 INFO L226 Difference]: Without dead ends: 2231 [2022-11-20 11:09:17,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:17,946 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:17,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-20 11:09:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-11-20 11:09:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2222. [2022-11-20 11:09:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2215 states have (on average 4.115124153498871) internal successors, (9115), 2221 states have internal predecessors, (9115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 9115 transitions. [2022-11-20 11:09:17,985 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 9115 transitions. Word has length 12 [2022-11-20 11:09:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:17,985 INFO L495 AbstractCegarLoop]: Abstraction has 2222 states and 9115 transitions. [2022-11-20 11:09:17,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 9115 transitions. [2022-11-20 11:09:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:17,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:17,986 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:18,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:18,187 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1652644770, now seen corresponding path program 2 times [2022-11-20 11:09:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323569179] [2022-11-20 11:09:18,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:18,188 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 [2022-11-20 11:09:18,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:18,189 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:18,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 11:09:18,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:09:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:18,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:18,594 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 11:09:18,595 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 15 treesize of output 36 [2022-11-20 11:09:18,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:09:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 11:09:18,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:18,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:18,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323569179] [2022-11-20 11:09:18,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323569179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:18,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:18,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:09:18,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863551397] [2022-11-20 11:09:18,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:18,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:09:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:09:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:18,851 INFO L87 Difference]: Start difference. First operand 2222 states and 9115 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:19,237 INFO L93 Difference]: Finished difference Result 2332 states and 9469 transitions. [2022-11-20 11:09:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:09:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 13 [2022-11-20 11:09:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:19,244 INFO L225 Difference]: With dead ends: 2332 [2022-11-20 11:09:19,244 INFO L226 Difference]: Without dead ends: 2332 [2022-11-20 11:09:19,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:09:19,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 117 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:19,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 7 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:09:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-11-20 11:09:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2207. [2022-11-20 11:09:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2202 states have (on average 4.123524069028156) internal successors, (9080), 2206 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 9080 transitions. [2022-11-20 11:09:19,297 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 9080 transitions. Word has length 13 [2022-11-20 11:09:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:19,297 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 9080 transitions. [2022-11-20 11:09:19,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 9080 transitions. [2022-11-20 11:09:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:19,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:19,300 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:09:19,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 11:09:19,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:19,513 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1327759887, now seen corresponding path program 4 times [2022-11-20 11:09:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041888540] [2022-11-20 11:09:19,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:19,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:19,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:19,515 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:19,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 11:09:19,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:09:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:20,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:20,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:09:20,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:09:21,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:21,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041888540] [2022-11-20 11:09:21,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041888540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:21,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:21,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:09:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455940417] [2022-11-20 11:09:21,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:21,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:09:21,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:21,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:09:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:09:21,885 INFO L87 Difference]: Start difference. First operand 2207 states and 9080 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:09:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:32,547 INFO L93 Difference]: Finished difference Result 4289 states and 17689 transitions. [2022-11-20 11:09:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:09:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 13 [2022-11-20 11:09:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:32,560 INFO L225 Difference]: With dead ends: 4289 [2022-11-20 11:09:32,560 INFO L226 Difference]: Without dead ends: 4289 [2022-11-20 11:09:32,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:09:32,560 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 978 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:32,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 71 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 11:09:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-11-20 11:09:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3011. [2022-11-20 11:09:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3006 states have (on average 4.363606121091151) internal successors, (13117), 3010 states have internal predecessors, (13117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 13117 transitions. [2022-11-20 11:09:32,627 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 13117 transitions. Word has length 13 [2022-11-20 11:09:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 13117 transitions. [2022-11-20 11:09:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 11:09:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 13117 transitions. [2022-11-20 11:09:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:32,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:32,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:32,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:32,829 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1487949392, now seen corresponding path program 4 times [2022-11-20 11:09:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:32,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971860545] [2022-11-20 11:09:32,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:32,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:32,831 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-20 11:09:33,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:33,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:09:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:33,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:33,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:09:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:09:34,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:34,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971860545] [2022-11-20 11:09:34,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971860545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:34,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:09:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897457552] [2022-11-20 11:09:34,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:09:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:09:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:09:34,798 INFO L87 Difference]: Start difference. First operand 3011 states and 13117 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) [2022-11-20 11:09:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:36,165 INFO L93 Difference]: Finished difference Result 3027 states and 13181 transitions. [2022-11-20 11:09:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:09:36,167 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 [2022-11-20 11:09:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:36,175 INFO L225 Difference]: With dead ends: 3027 [2022-11-20 11:09:36,175 INFO L226 Difference]: Without dead ends: 3027 [2022-11-20 11:09:36,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:09:36,175 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:36,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 29 Unchecked, 0.8s Time] [2022-11-20 11:09:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-11-20 11:09:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3027. [2022-11-20 11:09:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3022 states have (on average 4.361681005956321) internal successors, (13181), 3026 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 13181 transitions. [2022-11-20 11:09:36,231 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 13181 transitions. Word has length 13 [2022-11-20 11:09:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:36,231 INFO L495 AbstractCegarLoop]: Abstraction has 3027 states and 13181 transitions. [2022-11-20 11:09:36,231 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) [2022-11-20 11:09:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 13181 transitions. [2022-11-20 11:09:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:36,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:36,233 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:36,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:09:36,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:36,434 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:36,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1625146019, now seen corresponding path program 4 times [2022-11-20 11:09:36,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307027434] [2022-11-20 11:09:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:36,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:36,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:36,435 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-20 11:09:36,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:36,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:36,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:09:36,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:36,888 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:09:36,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:09:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:39,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:39,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307027434] [2022-11-20 11:09:39,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307027434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:39,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:39,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:09:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956990623] [2022-11-20 11:09:39,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:39,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:09:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:39,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:09:39,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:09:39,046 INFO L87 Difference]: Start difference. First operand 3027 states and 13181 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-20 11:09:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:49,093 INFO L93 Difference]: Finished difference Result 3568 states and 14563 transitions. [2022-11-20 11:09:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:09:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 [2022-11-20 11:09:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:49,105 INFO L225 Difference]: With dead ends: 3568 [2022-11-20 11:09:49,105 INFO L226 Difference]: Without dead ends: 3568 [2022-11-20 11:09:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:09:49,106 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 404 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:49,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 208 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 877 Invalid, 0 Unknown, 594 Unchecked, 5.7s Time] [2022-11-20 11:09:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-11-20 11:09:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3058. [2022-11-20 11:09:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3053 states have (on average 4.349164755977727) internal successors, (13278), 3057 states have internal predecessors, (13278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 13278 transitions. [2022-11-20 11:09:49,173 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 13278 transitions. Word has length 13 [2022-11-20 11:09:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:49,174 INFO L495 AbstractCegarLoop]: Abstraction has 3058 states and 13278 transitions. [2022-11-20 11:09:49,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-20 11:09:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 13278 transitions. [2022-11-20 11:09:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:49,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:49,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:49,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-20 11:09:49,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:49,376 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1712814112, now seen corresponding path program 4 times [2022-11-20 11:09:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119575250] [2022-11-20 11:09:49,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:09:49,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:49,378 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 11:09:49,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:09:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:49,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:09:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:49,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 11:09:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:50,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:50,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119575250] [2022-11-20 11:09:50,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119575250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:50,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:50,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:09:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317547818] [2022-11-20 11:09:50,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:09:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:09:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:09:50,619 INFO L87 Difference]: Start difference. First operand 3058 states and 13278 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:54,589 INFO L93 Difference]: Finished difference Result 5732 states and 22980 transitions. [2022-11-20 11:09:54,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:09:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:09:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:54,607 INFO L225 Difference]: With dead ends: 5732 [2022-11-20 11:09:54,608 INFO L226 Difference]: Without dead ends: 5732 [2022-11-20 11:09:54,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:09:54,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 556 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:54,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 53 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:09:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2022-11-20 11:09:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 3409. [2022-11-20 11:09:54,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3404 states have (on average 4.420387779083431) internal successors, (15047), 3408 states have internal predecessors, (15047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 15047 transitions. [2022-11-20 11:09:54,710 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 15047 transitions. Word has length 13 [2022-11-20 11:09:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:54,710 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 15047 transitions. [2022-11-20 11:09:54,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:54,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 15047 transitions. [2022-11-20 11:09:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:09:54,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:54,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:54,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-20 11:09:54,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:09:54,913 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:09:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1324935292, now seen corresponding path program 5 times [2022-11-20 11:09:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:09:54,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853405767] [2022-11-20 11:09:54,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:09:54,914 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 [2022-11-20 11:09:54,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:09:54,915 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:09:54,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-20 11:09:55,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:09:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:09:55,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:55,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:55,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 11:09:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:56,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:09:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853405767] [2022-11-20 11:09:56,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853405767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:56,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:56,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:09:56,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236047848] [2022-11-20 11:09:56,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:56,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:09:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:09:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:09:56,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:09:56,213 INFO L87 Difference]: Start difference. First operand 3409 states and 15047 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:01,176 INFO L93 Difference]: Finished difference Result 5744 states and 23416 transitions. [2022-11-20 11:10:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:10:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:10:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:01,192 INFO L225 Difference]: With dead ends: 5744 [2022-11-20 11:10:01,192 INFO L226 Difference]: Without dead ends: 5744 [2022-11-20 11:10:01,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=680, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:10:01,193 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 422 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:01,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 52 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 11:10:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2022-11-20 11:10:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 3239. [2022-11-20 11:10:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3234 states have (on average 4.396413110698825) internal successors, (14218), 3238 states have internal predecessors, (14218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 14218 transitions. [2022-11-20 11:10:01,280 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 14218 transitions. Word has length 13 [2022-11-20 11:10:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:01,280 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 14218 transitions. [2022-11-20 11:10:01,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 14218 transitions. [2022-11-20 11:10:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:01,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:01,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:01,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-20 11:10:01,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:01,482 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1501893832, now seen corresponding path program 6 times [2022-11-20 11:10:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515696496] [2022-11-20 11:10:01,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:10:01,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:01,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:01,484 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-20 11:10:01,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:10:01,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:10:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:01,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:02,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 11:10:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:02,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:02,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515696496] [2022-11-20 11:10:02,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515696496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:02,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:02,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:10:02,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863337211] [2022-11-20 11:10:02,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:02,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:10:02,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:02,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:10:02,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:10:02,692 INFO L87 Difference]: Start difference. First operand 3239 states and 14218 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:08,777 INFO L93 Difference]: Finished difference Result 6164 states and 24446 transitions. [2022-11-20 11:10:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:10:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:10:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:08,798 INFO L225 Difference]: With dead ends: 6164 [2022-11-20 11:10:08,798 INFO L226 Difference]: Without dead ends: 6164 [2022-11-20 11:10:08,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=378, Invalid=1028, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:10:08,798 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 652 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:08,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 64 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 11:10:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2022-11-20 11:10:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 3195. [2022-11-20 11:10:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3190 states have (on average 4.383385579937304) internal successors, (13983), 3194 states have internal predecessors, (13983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 13983 transitions. [2022-11-20 11:10:08,932 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 13983 transitions. Word has length 13 [2022-11-20 11:10:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:08,932 INFO L495 AbstractCegarLoop]: Abstraction has 3195 states and 13983 transitions. [2022-11-20 11:10:08,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 13983 transitions. [2022-11-20 11:10:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:08,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:08,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:08,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Ended with exit code 0 [2022-11-20 11:10:09,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:09,135 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1501896622, now seen corresponding path program 7 times [2022-11-20 11:10:09,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899618714] [2022-11-20 11:10:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:10:09,136 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 [2022-11-20 11:10:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:09,136 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:09,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-20 11:10:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:10:09,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:09,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:09,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-20 11:10:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:10,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899618714] [2022-11-20 11:10:10,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899618714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:10,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:10,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:10:10,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691851450] [2022-11-20 11:10:10,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:10,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:10:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:10:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:10:10,272 INFO L87 Difference]: Start difference. First operand 3195 states and 13983 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:15,307 INFO L93 Difference]: Finished difference Result 5339 states and 21532 transitions. [2022-11-20 11:10:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:10:15,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:10:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:15,320 INFO L225 Difference]: With dead ends: 5339 [2022-11-20 11:10:15,320 INFO L226 Difference]: Without dead ends: 5339 [2022-11-20 11:10:15,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:10:15,321 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 596 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:15,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 70 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 11:10:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-11-20 11:10:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 3315. [2022-11-20 11:10:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3310 states have (on average 4.419033232628399) internal successors, (14627), 3314 states have internal predecessors, (14627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 14627 transitions. [2022-11-20 11:10:15,401 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 14627 transitions. Word has length 13 [2022-11-20 11:10:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:15,401 INFO L495 AbstractCegarLoop]: Abstraction has 3315 states and 14627 transitions. [2022-11-20 11:10:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 14627 transitions. [2022-11-20 11:10:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:15,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:15,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:15,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-20 11:10:15,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:15,603 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -266773322, now seen corresponding path program 1 times [2022-11-20 11:10:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245256031] [2022-11-20 11:10:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:15,606 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:15,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-20 11:10:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:10:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:16,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:16,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:16,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:17,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:17,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245256031] [2022-11-20 11:10:17,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245256031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:17,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:17,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:17,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490497731] [2022-11-20 11:10:17,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:17,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:17,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:17,126 INFO L87 Difference]: Start difference. First operand 3315 states and 14627 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) [2022-11-20 11:10:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:17,782 INFO L93 Difference]: Finished difference Result 3720 states and 16594 transitions. [2022-11-20 11:10:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:17,784 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 [2022-11-20 11:10:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:17,793 INFO L225 Difference]: With dead ends: 3720 [2022-11-20 11:10:17,793 INFO L226 Difference]: Without dead ends: 3720 [2022-11-20 11:10:17,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:17,794 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:17,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2022-11-20 11:10:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-11-20 11:10:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3557. [2022-11-20 11:10:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3552 states have (on average 4.467905405405405) internal successors, (15870), 3556 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 15870 transitions. [2022-11-20 11:10:17,859 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 15870 transitions. Word has length 13 [2022-11-20 11:10:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:17,859 INFO L495 AbstractCegarLoop]: Abstraction has 3557 states and 15870 transitions. [2022-11-20 11:10:17,859 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) [2022-11-20 11:10:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 15870 transitions. [2022-11-20 11:10:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:17,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:17,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:17,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-20 11:10:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:18,061 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -266770532, now seen corresponding path program 2 times [2022-11-20 11:10:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:18,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94971254] [2022-11-20 11:10:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:18,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:18,063 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:18,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-20 11:10:18,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:18,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:18,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:18,562 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:18,563 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 [2022-11-20 11:10:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:18,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:19,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94971254] [2022-11-20 11:10:19,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94971254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:19,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:19,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:19,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464258725] [2022-11-20 11:10:19,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:19,554 INFO L87 Difference]: Start difference. First operand 3557 states and 15870 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) [2022-11-20 11:10:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:20,119 INFO L93 Difference]: Finished difference Result 3731 states and 16757 transitions. [2022-11-20 11:10:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:20,120 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 [2022-11-20 11:10:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:20,130 INFO L225 Difference]: With dead ends: 3731 [2022-11-20 11:10:20,130 INFO L226 Difference]: Without dead ends: 3731 [2022-11-20 11:10:20,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:20,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:20,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 16 Unchecked, 0.5s Time] [2022-11-20 11:10:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-11-20 11:10:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3626. [2022-11-20 11:10:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3621 states have (on average 4.497376415354874) internal successors, (16285), 3625 states have internal predecessors, (16285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 16285 transitions. [2022-11-20 11:10:20,226 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 16285 transitions. Word has length 13 [2022-11-20 11:10:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:20,227 INFO L495 AbstractCegarLoop]: Abstraction has 3626 states and 16285 transitions. [2022-11-20 11:10:20,227 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) [2022-11-20 11:10:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 16285 transitions. [2022-11-20 11:10:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:20,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:20,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:20,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-20 11:10:20,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:20,430 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -304108172, now seen corresponding path program 3 times [2022-11-20 11:10:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235145279] [2022-11-20 11:10:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:10:20,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:20,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:20,432 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:20,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-20 11:10:20,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:10:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:20,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:20,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:20,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:21,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:21,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235145279] [2022-11-20 11:10:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235145279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:21,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:21,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409301610] [2022-11-20 11:10:21,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:21,874 INFO L87 Difference]: Start difference. First operand 3626 states and 16285 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) [2022-11-20 11:10:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:22,481 INFO L93 Difference]: Finished difference Result 3932 states and 17737 transitions. [2022-11-20 11:10:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:10:22,483 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 [2022-11-20 11:10:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:22,494 INFO L225 Difference]: With dead ends: 3932 [2022-11-20 11:10:22,494 INFO L226 Difference]: Without dead ends: 3932 [2022-11-20 11:10:22,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:22,494 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:22,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 11:10:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-11-20 11:10:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3635. [2022-11-20 11:10:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3630 states have (on average 4.490633608815427) internal successors, (16301), 3634 states have internal predecessors, (16301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 16301 transitions. [2022-11-20 11:10:22,591 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 16301 transitions. Word has length 13 [2022-11-20 11:10:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:22,591 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 16301 transitions. [2022-11-20 11:10:22,591 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) [2022-11-20 11:10:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 16301 transitions. [2022-11-20 11:10:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:22,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:22,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:22,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-20 11:10:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:22,794 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -303950816, now seen corresponding path program 1 times [2022-11-20 11:10:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:22,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148825050] [2022-11-20 11:10:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:22,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:22,795 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:22,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-20 11:10:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:23,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:10:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:23,270 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:23,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:10:23,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:10:24,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148825050] [2022-11-20 11:10:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148825050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:24,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:24,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616173882] [2022-11-20 11:10:24,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:24,301 INFO L87 Difference]: Start difference. First operand 3635 states and 16301 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) [2022-11-20 11:10:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:24,929 INFO L93 Difference]: Finished difference Result 3694 states and 16535 transitions. [2022-11-20 11:10:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:10:24,931 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 [2022-11-20 11:10:24,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:24,943 INFO L225 Difference]: With dead ends: 3694 [2022-11-20 11:10:24,943 INFO L226 Difference]: Without dead ends: 3694 [2022-11-20 11:10:24,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:24,943 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:24,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2022-11-20 11:10:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-11-20 11:10:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3659. [2022-11-20 11:10:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3654 states have (on average 4.487684729064039) internal successors, (16398), 3658 states have internal predecessors, (16398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 16398 transitions. [2022-11-20 11:10:25,046 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 16398 transitions. Word has length 13 [2022-11-20 11:10:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:25,046 INFO L495 AbstractCegarLoop]: Abstraction has 3659 states and 16398 transitions. [2022-11-20 11:10:25,046 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) [2022-11-20 11:10:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 16398 transitions. [2022-11-20 11:10:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:25,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:25,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:25,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-20 11:10:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:25,249 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -303897806, now seen corresponding path program 2 times [2022-11-20 11:10:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613374108] [2022-11-20 11:10:25,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:25,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:25,251 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:25,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-20 11:10:25,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:25,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:25,752 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:25,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:10:26,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:10:26,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:26,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613374108] [2022-11-20 11:10:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613374108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:26,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:26,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929124643] [2022-11-20 11:10:26,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:26,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:26,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:26,714 INFO L87 Difference]: Start difference. First operand 3659 states and 16398 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) [2022-11-20 11:10:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:26,929 INFO L93 Difference]: Finished difference Result 3749 states and 16770 transitions. [2022-11-20 11:10:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:26,930 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 [2022-11-20 11:10:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:26,941 INFO L225 Difference]: With dead ends: 3749 [2022-11-20 11:10:26,941 INFO L226 Difference]: Without dead ends: 3749 [2022-11-20 11:10:26,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:26,942 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:26,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:10:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-11-20 11:10:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3665. [2022-11-20 11:10:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3660 states have (on average 4.4857923497267755) internal successors, (16418), 3664 states have internal predecessors, (16418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 16418 transitions. [2022-11-20 11:10:27,045 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 16418 transitions. Word has length 13 [2022-11-20 11:10:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:27,046 INFO L495 AbstractCegarLoop]: Abstraction has 3665 states and 16418 transitions. [2022-11-20 11:10:27,046 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) [2022-11-20 11:10:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 16418 transitions. [2022-11-20 11:10:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:27,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:27,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:27,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-20 11:10:27,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:27,248 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash -303864326, now seen corresponding path program 3 times [2022-11-20 11:10:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054218502] [2022-11-20 11:10:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:10:27,249 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 [2022-11-20 11:10:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:27,250 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:27,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-20 11:10:27,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:10:27,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:27,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:27,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:28,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:28,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:28,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054218502] [2022-11-20 11:10:28,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054218502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:28,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:28,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446817916] [2022-11-20 11:10:28,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:28,677 INFO L87 Difference]: Start difference. First operand 3665 states and 16418 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) [2022-11-20 11:10:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:29,387 INFO L93 Difference]: Finished difference Result 3763 states and 16808 transitions. [2022-11-20 11:10:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:29,389 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 [2022-11-20 11:10:29,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:29,399 INFO L225 Difference]: With dead ends: 3763 [2022-11-20 11:10:29,399 INFO L226 Difference]: Without dead ends: 3763 [2022-11-20 11:10:29,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:29,400 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:29,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-11-20 11:10:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2022-11-20 11:10:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3676. [2022-11-20 11:10:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3671 states have (on average 4.487060746390629) internal successors, (16472), 3675 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 16472 transitions. [2022-11-20 11:10:29,498 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 16472 transitions. Word has length 13 [2022-11-20 11:10:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:29,499 INFO L495 AbstractCegarLoop]: Abstraction has 3676 states and 16472 transitions. [2022-11-20 11:10:29,499 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) [2022-11-20 11:10:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 16472 transitions. [2022-11-20 11:10:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:29,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:29,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:29,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-20 11:10:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:29,701 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash -303868232, now seen corresponding path program 4 times [2022-11-20 11:10:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185129247] [2022-11-20 11:10:29,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:10:29,702 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 [2022-11-20 11:10:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:29,703 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:29,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-20 11:10:30,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:10:30,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:10:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:30,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:30,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:30,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:31,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:31,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185129247] [2022-11-20 11:10:31,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185129247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:31,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:31,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373972837] [2022-11-20 11:10:31,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:31,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:31,224 INFO L87 Difference]: Start difference. First operand 3676 states and 16472 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) [2022-11-20 11:10:32,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:32,110 INFO L93 Difference]: Finished difference Result 4402 states and 20058 transitions. [2022-11-20 11:10:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:32,112 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 [2022-11-20 11:10:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:32,124 INFO L225 Difference]: With dead ends: 4402 [2022-11-20 11:10:32,124 INFO L226 Difference]: Without dead ends: 4402 [2022-11-20 11:10:32,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:32,125 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:32,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 67 Unchecked, 0.8s Time] [2022-11-20 11:10:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2022-11-20 11:10:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3732. [2022-11-20 11:10:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3727 states have (on average 4.50228065468205) internal successors, (16780), 3731 states have internal predecessors, (16780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 16780 transitions. [2022-11-20 11:10:32,234 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 16780 transitions. Word has length 13 [2022-11-20 11:10:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:32,234 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 16780 transitions. [2022-11-20 11:10:32,234 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) [2022-11-20 11:10:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 16780 transitions. [2022-11-20 11:10:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:32,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:32,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:32,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-20 11:10:32,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:32,437 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash 791304883, now seen corresponding path program 1 times [2022-11-20 11:10:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:32,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901169730] [2022-11-20 11:10:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:32,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:32,439 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:32,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-20 11:10:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:10:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:32,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:32,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:33,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:33,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:33,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901169730] [2022-11-20 11:10:33,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901169730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:33,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:33,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154919256] [2022-11-20 11:10:33,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:33,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:33,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:33,913 INFO L87 Difference]: Start difference. First operand 3732 states and 16780 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) [2022-11-20 11:10:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:34,407 INFO L93 Difference]: Finished difference Result 3937 states and 17794 transitions. [2022-11-20 11:10:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:10:34,409 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 [2022-11-20 11:10:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:34,419 INFO L225 Difference]: With dead ends: 3937 [2022-11-20 11:10:34,420 INFO L226 Difference]: Without dead ends: 3937 [2022-11-20 11:10:34,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:34,420 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:34,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-11-20 11:10:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-11-20 11:10:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3758. [2022-11-20 11:10:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3753 states have (on average 4.503597122302159) internal successors, (16902), 3757 states have internal predecessors, (16902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 16902 transitions. [2022-11-20 11:10:34,519 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 16902 transitions. Word has length 13 [2022-11-20 11:10:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 16902 transitions. [2022-11-20 11:10:34,520 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) [2022-11-20 11:10:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 16902 transitions. [2022-11-20 11:10:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:34,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:34,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:34,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-20 11:10:34,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:34,722 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash 790901263, now seen corresponding path program 2 times [2022-11-20 11:10:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795035696] [2022-11-20 11:10:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:34,724 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-20 11:10:35,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:35,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:35,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:35,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:36,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795035696] [2022-11-20 11:10:36,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795035696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:36,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:36,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203041770] [2022-11-20 11:10:36,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:36,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:36,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:36,170 INFO L87 Difference]: Start difference. First operand 3758 states and 16902 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) [2022-11-20 11:10:36,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:36,820 INFO L93 Difference]: Finished difference Result 3967 states and 17732 transitions. [2022-11-20 11:10:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:10:36,821 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 [2022-11-20 11:10:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:36,833 INFO L225 Difference]: With dead ends: 3967 [2022-11-20 11:10:36,833 INFO L226 Difference]: Without dead ends: 3967 [2022-11-20 11:10:36,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:36,834 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:36,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 52 Unchecked, 0.6s Time] [2022-11-20 11:10:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2022-11-20 11:10:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3786. [2022-11-20 11:10:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3781 states have (on average 4.50251256281407) internal successors, (17024), 3785 states have internal predecessors, (17024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 17024 transitions. [2022-11-20 11:10:36,946 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 17024 transitions. Word has length 13 [2022-11-20 11:10:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 3786 states and 17024 transitions. [2022-11-20 11:10:36,946 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) [2022-11-20 11:10:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 17024 transitions. [2022-11-20 11:10:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:36,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:36,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:36,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-11-20 11:10:37,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:37,149 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:37,150 INFO L85 PathProgramCache]: Analyzing trace with hash 791069593, now seen corresponding path program 3 times [2022-11-20 11:10:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:37,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199306370] [2022-11-20 11:10:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:10:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:37,151 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:37,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-20 11:10:37,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:10:37,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:10:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:37,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:37,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:37,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:38,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199306370] [2022-11-20 11:10:38,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199306370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:38,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:38,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:10:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593931096] [2022-11-20 11:10:38,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:38,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:10:38,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:10:38,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:10:38,621 INFO L87 Difference]: Start difference. First operand 3786 states and 17024 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) [2022-11-20 11:10:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:39,196 INFO L93 Difference]: Finished difference Result 3923 states and 17582 transitions. [2022-11-20 11:10:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:10:39,197 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 [2022-11-20 11:10:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:39,207 INFO L225 Difference]: With dead ends: 3923 [2022-11-20 11:10:39,207 INFO L226 Difference]: Without dead ends: 3923 [2022-11-20 11:10:39,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:39,208 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:39,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-20 11:10:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-11-20 11:10:39,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3752. [2022-11-20 11:10:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3752 states, 3747 states have (on average 4.502802241793435) internal successors, (16872), 3751 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 16872 transitions. [2022-11-20 11:10:39,350 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 16872 transitions. Word has length 13 [2022-11-20 11:10:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:39,350 INFO L495 AbstractCegarLoop]: Abstraction has 3752 states and 16872 transitions. [2022-11-20 11:10:39,351 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) [2022-11-20 11:10:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 16872 transitions. [2022-11-20 11:10:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:39,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:39,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:39,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:39,566 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash 666212474, now seen corresponding path program 1 times [2022-11-20 11:10:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:39,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416219707] [2022-11-20 11:10:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:39,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:39,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:39,568 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:39,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-20 11:10:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:10:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:40,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:40,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:40,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:41,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416219707] [2022-11-20 11:10:41,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416219707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:41,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:41,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:10:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329000384] [2022-11-20 11:10:41,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:41,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:10:41,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:41,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:10:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:10:41,478 INFO L87 Difference]: Start difference. First operand 3752 states and 16872 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) [2022-11-20 11:10:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:47,882 INFO L93 Difference]: Finished difference Result 11728 states and 53377 transitions. [2022-11-20 11:10:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:10:47,884 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 [2022-11-20 11:10:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:47,930 INFO L225 Difference]: With dead ends: 11728 [2022-11-20 11:10:47,930 INFO L226 Difference]: Without dead ends: 11728 [2022-11-20 11:10:47,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:10:47,931 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 324 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:47,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 53 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 548 Invalid, 0 Unknown, 226 Unchecked, 2.9s Time] [2022-11-20 11:10:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11728 states. [2022-11-20 11:10:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11728 to 4101. [2022-11-20 11:10:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 4096 states have (on average 4.563232421875) internal successors, (18691), 4100 states have internal predecessors, (18691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 18691 transitions. [2022-11-20 11:10:48,142 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 18691 transitions. Word has length 13 [2022-11-20 11:10:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:48,142 INFO L495 AbstractCegarLoop]: Abstraction has 4101 states and 18691 transitions. [2022-11-20 11:10:48,142 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) [2022-11-20 11:10:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 18691 transitions. [2022-11-20 11:10:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:48,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:48,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:48,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:48,345 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 660850094, now seen corresponding path program 2 times [2022-11-20 11:10:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:48,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523414206] [2022-11-20 11:10:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:48,347 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:48,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-20 11:10:48,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:10:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:48,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:48,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:49,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:50,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:50,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523414206] [2022-11-20 11:10:50,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523414206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:50,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:50,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:10:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290364571] [2022-11-20 11:10:50,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:10:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:10:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:10:50,410 INFO L87 Difference]: Start difference. First operand 4101 states and 18691 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) [2022-11-20 11:10:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:55,064 INFO L93 Difference]: Finished difference Result 8952 states and 39488 transitions. [2022-11-20 11:10:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:10:55,066 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 [2022-11-20 11:10:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:55,094 INFO L225 Difference]: With dead ends: 8952 [2022-11-20 11:10:55,094 INFO L226 Difference]: Without dead ends: 8952 [2022-11-20 11:10:55,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:10:55,095 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 278 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:55,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 34 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 169 Unchecked, 1.8s Time] [2022-11-20 11:10:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8952 states. [2022-11-20 11:10:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8952 to 3813. [2022-11-20 11:10:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3808 states have (on average 4.439075630252101) internal successors, (16904), 3812 states have internal predecessors, (16904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 16904 transitions. [2022-11-20 11:10:55,273 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 16904 transitions. Word has length 13 [2022-11-20 11:10:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:55,274 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 16904 transitions. [2022-11-20 11:10:55,274 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) [2022-11-20 11:10:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 16904 transitions. [2022-11-20 11:10:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:55,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:55,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:55,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:55,477 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -952131406, now seen corresponding path program 1 times [2022-11-20 11:10:55,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649569588] [2022-11-20 11:10:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:55,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:55,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:55,479 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:55,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-20 11:10:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:10:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:55,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:55,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:56,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:57,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649569588] [2022-11-20 11:10:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649569588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:57,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:57,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:10:57,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896983711] [2022-11-20 11:10:57,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:57,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:10:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:10:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:10:57,024 INFO L87 Difference]: Start difference. First operand 3813 states and 16904 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:10:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:58,934 INFO L93 Difference]: Finished difference Result 3913 states and 17239 transitions. [2022-11-20 11:10:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:10:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2022-11-20 11:10:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:58,947 INFO L225 Difference]: With dead ends: 3913 [2022-11-20 11:10:58,947 INFO L226 Difference]: Without dead ends: 3913 [2022-11-20 11:10:58,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:10:58,948 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:58,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 78 Unchecked, 1.5s Time] [2022-11-20 11:10:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2022-11-20 11:10:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3789. [2022-11-20 11:10:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3784 states have (on average 4.441331923890063) internal successors, (16806), 3788 states have internal predecessors, (16806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 16806 transitions. [2022-11-20 11:10:59,085 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 16806 transitions. Word has length 13 [2022-11-20 11:10:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:59,086 INFO L495 AbstractCegarLoop]: Abstraction has 3789 states and 16806 transitions. [2022-11-20 11:10:59,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:10:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 16806 transitions. [2022-11-20 11:10:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:10:59,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:59,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:59,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-20 11:10:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:59,288 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:10:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1620924308, now seen corresponding path program 2 times [2022-11-20 11:10:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:10:59,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890309602] [2022-11-20 11:10:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:59,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:10:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:10:59,290 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:10:59,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-20 11:10:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:10:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:59,758 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:10:59,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:10:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:59,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:10:59,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:10:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890309602] [2022-11-20 11:10:59,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890309602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:59,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:59,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:10:59,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690701735] [2022-11-20 11:10:59,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:59,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:10:59,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:10:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:10:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:10:59,971 INFO L87 Difference]: Start difference. First operand 3789 states and 16806 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:00,165 INFO L93 Difference]: Finished difference Result 3798 states and 16831 transitions. [2022-11-20 11:11:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:11:00,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:11:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:00,178 INFO L225 Difference]: With dead ends: 3798 [2022-11-20 11:11:00,178 INFO L226 Difference]: Without dead ends: 3798 [2022-11-20 11:11:00,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:11:00,178 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:00,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 11:11:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2022-11-20 11:11:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3792. [2022-11-20 11:11:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3787 states have (on average 4.440190124108793) internal successors, (16815), 3791 states have internal predecessors, (16815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 16815 transitions. [2022-11-20 11:11:00,326 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 16815 transitions. Word has length 13 [2022-11-20 11:11:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:00,326 INFO L495 AbstractCegarLoop]: Abstraction has 3792 states and 16815 transitions. [2022-11-20 11:11:00,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 16815 transitions. [2022-11-20 11:11:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:11:00,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:00,330 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:00,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:00,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:00,539 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1375148558, now seen corresponding path program 3 times [2022-11-20 11:11:00,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45003228] [2022-11-20 11:11:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:11:00,539 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 [2022-11-20 11:11:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:00,540 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:00,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-20 11:11:00,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:11:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:11:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:01,018 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:01,018 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 17 treesize of output 44 [2022-11-20 11:11:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:11:01,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:11:01,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45003228] [2022-11-20 11:11:01,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45003228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:11:01,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:11:01,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:11:01,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484436608] [2022-11-20 11:11:01,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:01,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:11:01,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:01,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:11:01,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:11:01,227 INFO L87 Difference]: Start difference. First operand 3792 states and 16815 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:01,401 INFO L93 Difference]: Finished difference Result 3797 states and 16823 transitions. [2022-11-20 11:11:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:11:01,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:11:01,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:01,412 INFO L225 Difference]: With dead ends: 3797 [2022-11-20 11:11:01,412 INFO L226 Difference]: Without dead ends: 3797 [2022-11-20 11:11:01,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:11:01,413 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:01,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 11:11:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2022-11-20 11:11:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3790. [2022-11-20 11:11:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3785 states have (on average 4.439630118890356) internal successors, (16804), 3789 states have internal predecessors, (16804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 16804 transitions. [2022-11-20 11:11:01,491 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 16804 transitions. Word has length 13 [2022-11-20 11:11:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:01,491 INFO L495 AbstractCegarLoop]: Abstraction has 3790 states and 16804 transitions. [2022-11-20 11:11:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 16804 transitions. [2022-11-20 11:11:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:11:01,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:01,494 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:01,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:01,706 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1170799694, now seen corresponding path program 4 times [2022-11-20 11:11:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:01,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135688884] [2022-11-20 11:11:01,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:11:01,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:01,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:01,708 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:01,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-20 11:11:02,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:11:02,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:11:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:02,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:02,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:02,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:03,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135688884] [2022-11-20 11:11:03,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135688884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:03,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:03,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:11:03,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727224694] [2022-11-20 11:11:03,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:03,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:11:03,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:11:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:11:03,259 INFO L87 Difference]: Start difference. First operand 3790 states and 16804 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:11:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:05,575 INFO L93 Difference]: Finished difference Result 3968 states and 17380 transitions. [2022-11-20 11:11:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:11:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2022-11-20 11:11:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:05,587 INFO L225 Difference]: With dead ends: 3968 [2022-11-20 11:11:05,587 INFO L226 Difference]: Without dead ends: 3968 [2022-11-20 11:11:05,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:11:05,587 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:05,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 61 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 118 Unchecked, 1.6s Time] [2022-11-20 11:11:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2022-11-20 11:11:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3785. [2022-11-20 11:11:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3780 states have (on average 4.44021164021164) internal successors, (16784), 3784 states have internal predecessors, (16784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 16784 transitions. [2022-11-20 11:11:05,704 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 16784 transitions. Word has length 13 [2022-11-20 11:11:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:05,704 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 16784 transitions. [2022-11-20 11:11:05,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:11:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 16784 transitions. [2022-11-20 11:11:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:11:05,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:05,707 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:05,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-20 11:11:05,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:05,907 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2075801222, now seen corresponding path program 5 times [2022-11-20 11:11:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938474459] [2022-11-20 11:11:05,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:11:05,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:05,909 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:05,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-20 11:11:06,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:06,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:06,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:11:06,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:06,380 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:06,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:06,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:07,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938474459] [2022-11-20 11:11:07,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938474459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:07,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:07,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:11:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575610310] [2022-11-20 11:11:07,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:11:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:07,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:11:07,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:11:07,506 INFO L87 Difference]: Start difference. First operand 3785 states and 16784 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:11:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:09,365 INFO L93 Difference]: Finished difference Result 3916 states and 17206 transitions. [2022-11-20 11:11:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:11:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 [2022-11-20 11:11:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:09,377 INFO L225 Difference]: With dead ends: 3916 [2022-11-20 11:11:09,377 INFO L226 Difference]: Without dead ends: 3916 [2022-11-20 11:11:09,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:11:09,377 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:09,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 51 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 73 Unchecked, 1.6s Time] [2022-11-20 11:11:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2022-11-20 11:11:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3765. [2022-11-20 11:11:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3760 states have (on average 4.444148936170213) internal successors, (16710), 3764 states have internal predecessors, (16710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 16710 transitions. [2022-11-20 11:11:09,509 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 16710 transitions. Word has length 13 [2022-11-20 11:11:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:09,509 INFO L495 AbstractCegarLoop]: Abstraction has 3765 states and 16710 transitions. [2022-11-20 11:11:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) [2022-11-20 11:11:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 16710 transitions. [2022-11-20 11:11:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:09,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:09,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:09,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-20 11:11:09,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:09,712 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash -354124562, now seen corresponding path program 5 times [2022-11-20 11:11:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:09,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629432119] [2022-11-20 11:11:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:11:09,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:09,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:09,715 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-20 11:11:10,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:11:10,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:11:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:10,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:10,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:10,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:11,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629432119] [2022-11-20 11:11:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629432119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:11,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:11,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:11:11,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307106458] [2022-11-20 11:11:11,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:11,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:11:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:11:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:11:11,906 INFO L87 Difference]: Start difference. First operand 3765 states and 16710 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:15,758 INFO L93 Difference]: Finished difference Result 4451 states and 19028 transitions. [2022-11-20 11:11:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:11:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:11:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:15,772 INFO L225 Difference]: With dead ends: 4451 [2022-11-20 11:11:15,772 INFO L226 Difference]: Without dead ends: 4451 [2022-11-20 11:11:15,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:11:15,772 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 128 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:15,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 80 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 337 Invalid, 0 Unknown, 293 Unchecked, 2.7s Time] [2022-11-20 11:11:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2022-11-20 11:11:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3929. [2022-11-20 11:11:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3924 states have (on average 4.442915392456677) internal successors, (17434), 3928 states have internal predecessors, (17434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 17434 transitions. [2022-11-20 11:11:15,885 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 17434 transitions. Word has length 14 [2022-11-20 11:11:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:15,885 INFO L495 AbstractCegarLoop]: Abstraction has 3929 states and 17434 transitions. [2022-11-20 11:11:15,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 17434 transitions. [2022-11-20 11:11:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:15,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:15,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:15,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Ended with exit code 0 [2022-11-20 11:11:16,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:16,088 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1129287556, now seen corresponding path program 6 times [2022-11-20 11:11:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641445569] [2022-11-20 11:11:16,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:11:16,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:16,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:16,090 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-20 11:11:16,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:11:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:11:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:16,618 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:16,619 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:11:17,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:11:18,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:18,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641445569] [2022-11-20 11:11:18,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641445569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:18,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:18,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:11:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462267204] [2022-11-20 11:11:18,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:11:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:11:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:11:18,014 INFO L87 Difference]: Start difference. First operand 3929 states and 17434 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) [2022-11-20 11:11:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:19,441 INFO L93 Difference]: Finished difference Result 4185 states and 18505 transitions. [2022-11-20 11:11:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:11:19,442 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 14 [2022-11-20 11:11:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:19,495 INFO L225 Difference]: With dead ends: 4185 [2022-11-20 11:11:19,496 INFO L226 Difference]: Without dead ends: 4185 [2022-11-20 11:11:19,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:11:19,496 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:19,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 70 Unchecked, 0.9s Time] [2022-11-20 11:11:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2022-11-20 11:11:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 4049. [2022-11-20 11:11:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4044 states have (on average 4.4525222551928785) internal successors, (18006), 4048 states have internal predecessors, (18006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 18006 transitions. [2022-11-20 11:11:19,574 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 18006 transitions. Word has length 14 [2022-11-20 11:11:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 4049 states and 18006 transitions. [2022-11-20 11:11:19,574 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) [2022-11-20 11:11:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 18006 transitions. [2022-11-20 11:11:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:19,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:19,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:19,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Ended with exit code 0 [2022-11-20 11:11:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:19,777 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1118216836, now seen corresponding path program 7 times [2022-11-20 11:11:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:19,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499397858] [2022-11-20 11:11:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:11:19,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:19,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:19,780 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:19,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-20 11:11:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:11:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:20,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:20,311 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 [2022-11-20 11:11:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:11:20,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:11:21,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499397858] [2022-11-20 11:11:21,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499397858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:21,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:21,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:11:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781608341] [2022-11-20 11:11:21,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:21,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:11:21,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:11:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:11:21,897 INFO L87 Difference]: Start difference. First operand 4049 states and 18006 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) [2022-11-20 11:11:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:24,191 INFO L93 Difference]: Finished difference Result 4423 states and 19561 transitions. [2022-11-20 11:11:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:11:24,193 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 14 [2022-11-20 11:11:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:24,208 INFO L225 Difference]: With dead ends: 4423 [2022-11-20 11:11:24,208 INFO L226 Difference]: Without dead ends: 4423 [2022-11-20 11:11:24,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:11:24,208 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:24,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 51 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 156 Unchecked, 1.6s Time] [2022-11-20 11:11:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2022-11-20 11:11:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 4177. [2022-11-20 11:11:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4177 states, 4172 states have (on average 4.462607861936721) internal successors, (18618), 4176 states have internal predecessors, (18618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 18618 transitions. [2022-11-20 11:11:24,323 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 18618 transitions. Word has length 14 [2022-11-20 11:11:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:24,323 INFO L495 AbstractCegarLoop]: Abstraction has 4177 states and 18618 transitions. [2022-11-20 11:11:24,323 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) [2022-11-20 11:11:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 18618 transitions. [2022-11-20 11:11:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:24,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:24,327 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:24,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Ended with exit code 0 [2022-11-20 11:11:24,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:24,528 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1924760151, now seen corresponding path program 5 times [2022-11-20 11:11:24,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:24,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326326620] [2022-11-20 11:11:24,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:11:24,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:24,530 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:24,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-20 11:11:24,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:11:24,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:11:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:25,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:25,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:27,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326326620] [2022-11-20 11:11:27,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326326620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:27,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:27,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:11:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188400101] [2022-11-20 11:11:27,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:27,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:11:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:11:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:11:27,254 INFO L87 Difference]: Start difference. First operand 4177 states and 18618 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:35,845 INFO L93 Difference]: Finished difference Result 6939 states and 31446 transitions. [2022-11-20 11:11:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:11:35,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-20 11:11:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:35,869 INFO L225 Difference]: With dead ends: 6939 [2022-11-20 11:11:35,869 INFO L226 Difference]: Without dead ends: 6939 [2022-11-20 11:11:35,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:11:35,869 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 388 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:35,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 222 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 325 Invalid, 0 Unknown, 222 Unchecked, 2.1s Time] [2022-11-20 11:11:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6939 states. [2022-11-20 11:11:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6939 to 4216. [2022-11-20 11:11:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4211 states have (on average 4.465685110425077) internal successors, (18805), 4215 states have internal predecessors, (18805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 18805 transitions. [2022-11-20 11:11:35,981 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 18805 transitions. Word has length 14 [2022-11-20 11:11:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:35,982 INFO L495 AbstractCegarLoop]: Abstraction has 4216 states and 18805 transitions. [2022-11-20 11:11:35,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 18805 transitions. [2022-11-20 11:11:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:35,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:35,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:35,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-20 11:11:36,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:36,185 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1557630930, now seen corresponding path program 8 times [2022-11-20 11:11:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352843798] [2022-11-20 11:11:36,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:11:36,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:36,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:36,187 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:36,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-20 11:11:36,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:11:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:36,755 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:36,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:37,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:39,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352843798] [2022-11-20 11:11:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352843798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:39,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:39,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:11:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061231632] [2022-11-20 11:11:39,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:11:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:11:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:11:39,133 INFO L87 Difference]: Start difference. First operand 4216 states and 18805 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) [2022-11-20 11:11:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:41,623 INFO L93 Difference]: Finished difference Result 4331 states and 19307 transitions. [2022-11-20 11:11:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:11:41,625 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 [2022-11-20 11:11:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:41,638 INFO L225 Difference]: With dead ends: 4331 [2022-11-20 11:11:41,638 INFO L226 Difference]: Without dead ends: 4331 [2022-11-20 11:11:41,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:11:41,639 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:41,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 16 Unchecked, 1.5s Time] [2022-11-20 11:11:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-11-20 11:11:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4254. [2022-11-20 11:11:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4249 states have (on average 4.468816192045187) internal successors, (18988), 4253 states have internal predecessors, (18988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 18988 transitions. [2022-11-20 11:11:41,728 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 18988 transitions. Word has length 14 [2022-11-20 11:11:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:41,728 INFO L495 AbstractCegarLoop]: Abstraction has 4254 states and 18988 transitions. [2022-11-20 11:11:41,728 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) [2022-11-20 11:11:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 18988 transitions. [2022-11-20 11:11:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:41,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:41,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:41,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:41,947 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1876677898, now seen corresponding path program 9 times [2022-11-20 11:11:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911761906] [2022-11-20 11:11:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:11:41,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:41,949 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:41,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-20 11:11:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:11:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:11:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:42,563 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:42,563 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 [2022-11-20 11:11:43,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:11:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:43,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:44,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:44,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911761906] [2022-11-20 11:11:44,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911761906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:44,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:44,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:11:44,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414409981] [2022-11-20 11:11:44,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:44,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:11:44,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:44,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:11:44,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:11:44,236 INFO L87 Difference]: Start difference. First operand 4254 states and 18988 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) [2022-11-20 11:11:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:46,757 INFO L93 Difference]: Finished difference Result 4700 states and 20373 transitions. [2022-11-20 11:11:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:11:46,758 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 14 [2022-11-20 11:11:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:46,772 INFO L225 Difference]: With dead ends: 4700 [2022-11-20 11:11:46,772 INFO L226 Difference]: Without dead ends: 4700 [2022-11-20 11:11:46,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:11:46,773 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:46,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 104 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 314 Unchecked, 1.0s Time] [2022-11-20 11:11:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2022-11-20 11:11:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 4319. [2022-11-20 11:11:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4319 states, 4314 states have (on average 4.462679647658786) internal successors, (19252), 4318 states have internal predecessors, (19252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 19252 transitions. [2022-11-20 11:11:46,906 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 19252 transitions. Word has length 14 [2022-11-20 11:11:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:46,906 INFO L495 AbstractCegarLoop]: Abstraction has 4319 states and 19252 transitions. [2022-11-20 11:11:46,907 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) [2022-11-20 11:11:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 19252 transitions. [2022-11-20 11:11:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:46,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:46,910 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:46,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Ended with exit code 0 [2022-11-20 11:11:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:47,111 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:47,111 INFO L85 PathProgramCache]: Analyzing trace with hash -685930547, now seen corresponding path program 10 times [2022-11-20 11:11:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:47,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107913961] [2022-11-20 11:11:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:11:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:47,113 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:47,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-20 11:11:47,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:11:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:47,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:11:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:47,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:47,636 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 [2022-11-20 11:11:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:48,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:50,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107913961] [2022-11-20 11:11:50,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107913961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:50,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:50,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:11:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215848604] [2022-11-20 11:11:50,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:11:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:11:50,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:11:50,024 INFO L87 Difference]: Start difference. First operand 4319 states and 19252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:59,057 INFO L93 Difference]: Finished difference Result 5020 states and 21173 transitions. [2022-11-20 11:11:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:11:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-20 11:11:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:59,071 INFO L225 Difference]: With dead ends: 5020 [2022-11-20 11:11:59,071 INFO L226 Difference]: Without dead ends: 5020 [2022-11-20 11:11:59,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:11:59,071 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 353 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:59,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 215 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 826 Invalid, 0 Unknown, 677 Unchecked, 5.2s Time] [2022-11-20 11:11:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2022-11-20 11:11:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 4322. [2022-11-20 11:11:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4317 states have (on average 4.462126476719944) internal successors, (19263), 4321 states have internal predecessors, (19263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 19263 transitions. [2022-11-20 11:11:59,158 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 19263 transitions. Word has length 14 [2022-11-20 11:11:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:59,158 INFO L495 AbstractCegarLoop]: Abstraction has 4322 states and 19263 transitions. [2022-11-20 11:11:59,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 19263 transitions. [2022-11-20 11:11:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:11:59,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:59,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:59,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Ended with exit code 0 [2022-11-20 11:11:59,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:59,362 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:11:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -685930454, now seen corresponding path program 11 times [2022-11-20 11:11:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:59,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29086296] [2022-11-20 11:11:59,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:11:59,363 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 [2022-11-20 11:11:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:59,363 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:59,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-20 11:11:59,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:11:59,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:11:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:59,903 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:59,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:00,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:01,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29086296] [2022-11-20 11:12:01,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29086296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:01,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:01,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:12:01,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362638072] [2022-11-20 11:12:01,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:01,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:12:01,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:01,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:12:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:12:01,811 INFO L87 Difference]: Start difference. First operand 4322 states and 19263 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) [2022-11-20 11:12:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:07,460 INFO L93 Difference]: Finished difference Result 5486 states and 23652 transitions. [2022-11-20 11:12:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:12:07,462 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 [2022-11-20 11:12:07,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:07,513 INFO L225 Difference]: With dead ends: 5486 [2022-11-20 11:12:07,513 INFO L226 Difference]: Without dead ends: 5486 [2022-11-20 11:12:07,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:12:07,513 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 182 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:07,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 51 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 197 Unchecked, 2.2s Time] [2022-11-20 11:12:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-11-20 11:12:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4651. [2022-11-20 11:12:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4646 states have (on average 4.532716315109772) internal successors, (21059), 4650 states have internal predecessors, (21059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 21059 transitions. [2022-11-20 11:12:07,606 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 21059 transitions. Word has length 14 [2022-11-20 11:12:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:07,606 INFO L495 AbstractCegarLoop]: Abstraction has 4651 states and 21059 transitions. [2022-11-20 11:12:07,606 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) [2022-11-20 11:12:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 21059 transitions. [2022-11-20 11:12:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:12:07,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:07,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:07,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-20 11:12:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:07,810 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:12:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash -685927664, now seen corresponding path program 12 times [2022-11-20 11:12:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:07,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031644299] [2022-11-20 11:12:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:12:07,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:07,812 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:07,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-20 11:12:08,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:12:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:12:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:08,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:08,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:08,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:10,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031644299] [2022-11-20 11:12:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031644299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:10,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:10,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:12:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085676791] [2022-11-20 11:12:10,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:12:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:12:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:12:10,552 INFO L87 Difference]: Start difference. First operand 4651 states and 21059 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) [2022-11-20 11:12:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:23,390 INFO L93 Difference]: Finished difference Result 9304 states and 40758 transitions. [2022-11-20 11:12:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:12:23,392 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 [2022-11-20 11:12:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:23,421 INFO L225 Difference]: With dead ends: 9304 [2022-11-20 11:12:23,421 INFO L226 Difference]: Without dead ends: 9304 [2022-11-20 11:12:23,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:12:23,421 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 193 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:23,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 45 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 662 Invalid, 0 Unknown, 543 Unchecked, 6.8s Time] [2022-11-20 11:12:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9304 states. [2022-11-20 11:12:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9304 to 5264. [2022-11-20 11:12:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5259 states have (on average 4.590796729416239) internal successors, (24143), 5263 states have internal predecessors, (24143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 24143 transitions. [2022-11-20 11:12:23,557 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 24143 transitions. Word has length 14 [2022-11-20 11:12:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:23,558 INFO L495 AbstractCegarLoop]: Abstraction has 5264 states and 24143 transitions. [2022-11-20 11:12:23,558 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) [2022-11-20 11:12:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 24143 transitions. [2022-11-20 11:12:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:12:23,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:23,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:23,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Ended with exit code 0 [2022-11-20 11:12:23,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:23,761 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:12:23,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -685841174, now seen corresponding path program 13 times [2022-11-20 11:12:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:23,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828332202] [2022-11-20 11:12:23,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:12:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:23,763 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-20 11:12:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:12:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:24,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:24,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:24,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:26,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:26,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828332202] [2022-11-20 11:12:26,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828332202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:26,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:26,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:12:26,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461082148] [2022-11-20 11:12:26,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:26,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:12:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:12:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:12:26,491 INFO L87 Difference]: Start difference. First operand 5264 states and 24143 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) [2022-11-20 11:12:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:29,377 INFO L93 Difference]: Finished difference Result 5419 states and 24813 transitions. [2022-11-20 11:12:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:12:29,379 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 [2022-11-20 11:12:29,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:29,396 INFO L225 Difference]: With dead ends: 5419 [2022-11-20 11:12:29,396 INFO L226 Difference]: Without dead ends: 5419 [2022-11-20 11:12:29,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:12:29,397 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:29,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 39 Unchecked, 1.5s Time] [2022-11-20 11:12:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5419 states. [2022-11-20 11:12:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5419 to 5324. [2022-11-20 11:12:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5324 states, 5319 states have (on average 4.59710471893213) internal successors, (24452), 5323 states have internal predecessors, (24452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 24452 transitions. [2022-11-20 11:12:29,515 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 24452 transitions. Word has length 14 [2022-11-20 11:12:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:29,515 INFO L495 AbstractCegarLoop]: Abstraction has 5324 states and 24452 transitions. [2022-11-20 11:12:29,515 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) [2022-11-20 11:12:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 24452 transitions. [2022-11-20 11:12:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:12:29,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:29,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:29,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-20 11:12:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:29,720 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:12:29,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash -19509274, now seen corresponding path program 14 times [2022-11-20 11:12:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:29,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014816791] [2022-11-20 11:12:29,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:12:29,720 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 [2022-11-20 11:12:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:29,721 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:29,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-20 11:12:30,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:12:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:12:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:30,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:30,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:30,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:32,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014816791] [2022-11-20 11:12:32,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014816791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:32,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:32,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:12:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005505115] [2022-11-20 11:12:32,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:32,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:12:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:12:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:12:32,601 INFO L87 Difference]: Start difference. First operand 5324 states and 24452 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) [2022-11-20 11:12:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:43,442 INFO L93 Difference]: Finished difference Result 10317 states and 46725 transitions. [2022-11-20 11:12:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:12:43,444 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 [2022-11-20 11:12:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:43,483 INFO L225 Difference]: With dead ends: 10317 [2022-11-20 11:12:43,483 INFO L226 Difference]: Without dead ends: 10317 [2022-11-20 11:12:43,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:12:43,484 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 255 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1112 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 29 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 625 Invalid, 0 Unknown, 1112 Unchecked, 5.7s Time] [2022-11-20 11:12:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10317 states. [2022-11-20 11:12:43,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10317 to 5627. [2022-11-20 11:12:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5627 states, 5622 states have (on average 4.608324439701174) internal successors, (25908), 5626 states have internal predecessors, (25908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5627 states to 5627 states and 25908 transitions. [2022-11-20 11:12:43,663 INFO L78 Accepts]: Start accepts. Automaton has 5627 states and 25908 transitions. Word has length 14 [2022-11-20 11:12:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:43,663 INFO L495 AbstractCegarLoop]: Abstraction has 5627 states and 25908 transitions. [2022-11-20 11:12:43,663 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) [2022-11-20 11:12:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5627 states and 25908 transitions. [2022-11-20 11:12:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:12:43,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:43,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:43,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-20 11:12:43,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:43,868 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:12:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash -19422784, now seen corresponding path program 15 times [2022-11-20 11:12:43,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:43,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609994620] [2022-11-20 11:12:43,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:43,870 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-20 11:12:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:12:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:12:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:44,458 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:44,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:45,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:46,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:46,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609994620] [2022-11-20 11:12:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609994620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:46,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:46,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:12:46,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958674037] [2022-11-20 11:12:46,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:46,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:12:46,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:12:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:12:46,642 INFO L87 Difference]: Start difference. First operand 5627 states and 25908 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) [2022-11-20 11:12:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:57,851 INFO L93 Difference]: Finished difference Result 9974 states and 44815 transitions. [2022-11-20 11:12:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:12:57,853 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 [2022-11-20 11:12:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:57,888 INFO L225 Difference]: With dead ends: 9974 [2022-11-20 11:12:57,888 INFO L226 Difference]: Without dead ends: 9974 [2022-11-20 11:12:57,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=325, Invalid=1157, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:12:57,888 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 270 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:57,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 27 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 530 Invalid, 0 Unknown, 1153 Unchecked, 5.0s Time] [2022-11-20 11:12:57,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9974 states. [2022-11-20 11:12:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9974 to 6270. [2022-11-20 11:12:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 6265 states have (on average 4.6951316839585) internal successors, (29415), 6269 states have internal predecessors, (29415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 29415 transitions. [2022-11-20 11:12:58,116 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 29415 transitions. Word has length 14 [2022-11-20 11:12:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:58,117 INFO L495 AbstractCegarLoop]: Abstraction has 6270 states and 29415 transitions. [2022-11-20 11:12:58,117 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) [2022-11-20 11:12:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 29415 transitions. [2022-11-20 11:12:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:12:58,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:58,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:58,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:58,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:58,322 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:12:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash -822245986, now seen corresponding path program 3 times [2022-11-20 11:12:58,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:58,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810347426] [2022-11-20 11:12:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:58,323 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 [2022-11-20 11:12:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:58,324 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:58,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-20 11:12:58,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:12:58,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:12:58,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:58,880 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:58,880 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 17 treesize of output 44 [2022-11-20 11:12:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:59,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:00,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:00,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810347426] [2022-11-20 11:13:00,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810347426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:00,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:00,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:13:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101293572] [2022-11-20 11:13:00,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:13:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:13:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:13:00,930 INFO L87 Difference]: Start difference. First operand 6270 states and 29415 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) [2022-11-20 11:13:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:11,672 INFO L93 Difference]: Finished difference Result 8503 states and 38164 transitions. [2022-11-20 11:13:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:13:11,674 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 14 [2022-11-20 11:13:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:11,699 INFO L225 Difference]: With dead ends: 8503 [2022-11-20 11:13:11,699 INFO L226 Difference]: Without dead ends: 8503 [2022-11-20 11:13:11,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=591, Invalid=1665, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:13:11,700 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 501 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1168 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:11,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 141 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 568 Invalid, 0 Unknown, 1168 Unchecked, 2.7s Time] [2022-11-20 11:13:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2022-11-20 11:13:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 6627. [2022-11-20 11:13:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6622 states have (on average 4.674116581093325) internal successors, (30952), 6626 states have internal predecessors, (30952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 30952 transitions. [2022-11-20 11:13:11,920 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 30952 transitions. Word has length 14 [2022-11-20 11:13:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:11,920 INFO L495 AbstractCegarLoop]: Abstraction has 6627 states and 30952 transitions. [2022-11-20 11:13:11,920 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) [2022-11-20 11:13:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 30952 transitions. [2022-11-20 11:13:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:11,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:11,925 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:11,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:12,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:12,126 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:12,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1401946172, now seen corresponding path program 5 times [2022-11-20 11:13:12,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:12,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790329268] [2022-11-20 11:13:12,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:13:12,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:12,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:12,127 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:12,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-20 11:13:12,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:13:12,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:13:12,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:12,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:12,638 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 [2022-11-20 11:13:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:12,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:13,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790329268] [2022-11-20 11:13:13,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790329268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:13,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:13,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380477567] [2022-11-20 11:13:13,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:13,996 INFO L87 Difference]: Start difference. First operand 6627 states and 30952 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:21,007 INFO L93 Difference]: Finished difference Result 11076 states and 52303 transitions. [2022-11-20 11:13:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:13:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:21,043 INFO L225 Difference]: With dead ends: 11076 [2022-11-20 11:13:21,043 INFO L226 Difference]: Without dead ends: 11076 [2022-11-20 11:13:21,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:13:21,044 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 321 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:21,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 134 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 495 Invalid, 0 Unknown, 261 Unchecked, 3.8s Time] [2022-11-20 11:13:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2022-11-20 11:13:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 6588. [2022-11-20 11:13:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6583 states have (on average 4.699680996506152) internal successors, (30938), 6587 states have internal predecessors, (30938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 30938 transitions. [2022-11-20 11:13:21,219 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 30938 transitions. Word has length 14 [2022-11-20 11:13:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:21,219 INFO L495 AbstractCegarLoop]: Abstraction has 6588 states and 30938 transitions. [2022-11-20 11:13:21,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 30938 transitions. [2022-11-20 11:13:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:21,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:21,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:21,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-20 11:13:21,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:21,423 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1401859682, now seen corresponding path program 6 times [2022-11-20 11:13:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289296769] [2022-11-20 11:13:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:13:21,424 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 [2022-11-20 11:13:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:21,425 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:21,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-20 11:13:21,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:13:21,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:21,979 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:21,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:22,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:23,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:23,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289296769] [2022-11-20 11:13:23,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289296769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:23,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:23,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:23,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675538724] [2022-11-20 11:13:23,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:23,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:23,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:23,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:23,382 INFO L87 Difference]: Start difference. First operand 6588 states and 30938 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:26,041 INFO L93 Difference]: Finished difference Result 6960 states and 31954 transitions. [2022-11-20 11:13:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:13:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:26,066 INFO L225 Difference]: With dead ends: 6960 [2022-11-20 11:13:26,066 INFO L226 Difference]: Without dead ends: 6960 [2022-11-20 11:13:26,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:26,066 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:26,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 92 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 167 Unchecked, 2.2s Time] [2022-11-20 11:13:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6960 states. [2022-11-20 11:13:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6960 to 6658. [2022-11-20 11:13:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6658 states, 6653 states have (on average 4.690966481286638) internal successors, (31209), 6657 states have internal predecessors, (31209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 31209 transitions. [2022-11-20 11:13:26,229 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 31209 transitions. Word has length 14 [2022-11-20 11:13:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:26,229 INFO L495 AbstractCegarLoop]: Abstraction has 6658 states and 31209 transitions. [2022-11-20 11:13:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 31209 transitions. [2022-11-20 11:13:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:26,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:26,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:26,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Ended with exit code 0 [2022-11-20 11:13:26,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:26,434 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1221550198, now seen corresponding path program 4 times [2022-11-20 11:13:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:26,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911267114] [2022-11-20 11:13:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:13:26,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:26,436 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:26,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-20 11:13:26,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:13:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:27,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:27,027 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 [2022-11-20 11:13:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:27,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:28,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911267114] [2022-11-20 11:13:28,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911267114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:28,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:28,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836426520] [2022-11-20 11:13:28,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:28,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:28,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:28,348 INFO L87 Difference]: Start difference. First operand 6658 states and 31209 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:30,993 INFO L93 Difference]: Finished difference Result 6792 states and 31488 transitions. [2022-11-20 11:13:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:13:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:31,018 INFO L225 Difference]: With dead ends: 6792 [2022-11-20 11:13:31,018 INFO L226 Difference]: Without dead ends: 6792 [2022-11-20 11:13:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:31,019 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:31,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 90 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 132 Unchecked, 2.1s Time] [2022-11-20 11:13:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-11-20 11:13:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 6658. [2022-11-20 11:13:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6658 states, 6653 states have (on average 4.6905155568916275) internal successors, (31206), 6657 states have internal predecessors, (31206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6658 states to 6658 states and 31206 transitions. [2022-11-20 11:13:31,274 INFO L78 Accepts]: Start accepts. Automaton has 6658 states and 31206 transitions. Word has length 14 [2022-11-20 11:13:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:31,275 INFO L495 AbstractCegarLoop]: Abstraction has 6658 states and 31206 transitions. [2022-11-20 11:13:31,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6658 states and 31206 transitions. [2022-11-20 11:13:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:31,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:31,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:31,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Forceful destruction successful, exit code 0 [2022-11-20 11:13:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:31,479 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1221429112, now seen corresponding path program 7 times [2022-11-20 11:13:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:31,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550376138] [2022-11-20 11:13:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:13:31,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:31,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:31,483 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:31,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-20 11:13:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:31,989 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:32,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:33,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550376138] [2022-11-20 11:13:33,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550376138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:33,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:33,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059573282] [2022-11-20 11:13:33,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:33,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:33,366 INFO L87 Difference]: Start difference. First operand 6658 states and 31206 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:35,714 INFO L93 Difference]: Finished difference Result 6798 states and 31551 transitions. [2022-11-20 11:13:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:13:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:35,736 INFO L225 Difference]: With dead ends: 6798 [2022-11-20 11:13:35,736 INFO L226 Difference]: Without dead ends: 6798 [2022-11-20 11:13:35,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:35,737 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:35,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 91 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 325 Invalid, 0 Unknown, 73 Unchecked, 1.9s Time] [2022-11-20 11:13:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2022-11-20 11:13:35,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6659. [2022-11-20 11:13:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6659 states, 6654 states have (on average 4.689960925758942) internal successors, (31207), 6658 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 31207 transitions. [2022-11-20 11:13:35,878 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 31207 transitions. Word has length 14 [2022-11-20 11:13:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:35,879 INFO L495 AbstractCegarLoop]: Abstraction has 6659 states and 31207 transitions. [2022-11-20 11:13:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 31207 transitions. [2022-11-20 11:13:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:35,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:35,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:35,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-20 11:13:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:36,083 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:36,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:36,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1560135366, now seen corresponding path program 5 times [2022-11-20 11:13:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:36,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026412362] [2022-11-20 11:13:36,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:13:36,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:36,085 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:36,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-20 11:13:36,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:13:36,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:13:36,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:36,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:37,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:38,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026412362] [2022-11-20 11:13:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026412362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:38,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:38,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302714029] [2022-11-20 11:13:38,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:38,112 INFO L87 Difference]: Start difference. First operand 6659 states and 31207 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:46,010 INFO L93 Difference]: Finished difference Result 8936 states and 40841 transitions. [2022-11-20 11:13:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:13:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:46,046 INFO L225 Difference]: With dead ends: 8936 [2022-11-20 11:13:46,046 INFO L226 Difference]: Without dead ends: 8936 [2022-11-20 11:13:46,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:13:46,047 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 259 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:46,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 116 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 594 Invalid, 0 Unknown, 209 Unchecked, 4.6s Time] [2022-11-20 11:13:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8936 states. [2022-11-20 11:13:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8936 to 6660. [2022-11-20 11:13:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6660 states, 6655 states have (on average 4.689706987227648) internal successors, (31210), 6659 states have internal predecessors, (31210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 31210 transitions. [2022-11-20 11:13:46,223 INFO L78 Accepts]: Start accepts. Automaton has 6660 states and 31210 transitions. Word has length 14 [2022-11-20 11:13:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:46,223 INFO L495 AbstractCegarLoop]: Abstraction has 6660 states and 31210 transitions. [2022-11-20 11:13:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6660 states and 31210 transitions. [2022-11-20 11:13:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:46,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:46,228 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:46,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-20 11:13:46,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:46,428 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:46,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:46,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1562816556, now seen corresponding path program 6 times [2022-11-20 11:13:46,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:46,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603674908] [2022-11-20 11:13:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:13:46,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:46,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:46,430 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:46,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-20 11:13:46,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:13:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:46,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:46,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:47,012 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:47,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:47,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:48,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603674908] [2022-11-20 11:13:48,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603674908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:48,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:48,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:48,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081560883] [2022-11-20 11:13:48,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:48,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:48,428 INFO L87 Difference]: Start difference. First operand 6660 states and 31210 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:51,398 INFO L93 Difference]: Finished difference Result 6956 states and 31923 transitions. [2022-11-20 11:13:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:13:51,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:51,421 INFO L225 Difference]: With dead ends: 6956 [2022-11-20 11:13:51,421 INFO L226 Difference]: Without dead ends: 6956 [2022-11-20 11:13:51,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:51,422 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:51,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 93 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 388 Invalid, 0 Unknown, 229 Unchecked, 2.5s Time] [2022-11-20 11:13:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6956 states. [2022-11-20 11:13:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6956 to 6649. [2022-11-20 11:13:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6644 states have (on average 4.691450933172788) internal successors, (31170), 6648 states have internal predecessors, (31170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 31170 transitions. [2022-11-20 11:13:51,569 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 31170 transitions. Word has length 14 [2022-11-20 11:13:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:51,569 INFO L495 AbstractCegarLoop]: Abstraction has 6649 states and 31170 transitions. [2022-11-20 11:13:51,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 31170 transitions. [2022-11-20 11:13:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:51,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:51,573 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:51,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-20 11:13:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:51,774 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash 198045060, now seen corresponding path program 7 times [2022-11-20 11:13:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:51,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137966813] [2022-11-20 11:13:51,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:13:51,774 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 [2022-11-20 11:13:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:51,776 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:51,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-20 11:13:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:52,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:52,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:52,306 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:52,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:52,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:53,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:53,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137966813] [2022-11-20 11:13:53,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137966813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:53,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:53,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601407610] [2022-11-20 11:13:53,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:53,712 INFO L87 Difference]: Start difference. First operand 6649 states and 31170 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:56,435 INFO L93 Difference]: Finished difference Result 6868 states and 31668 transitions. [2022-11-20 11:13:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:13:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:56,457 INFO L225 Difference]: With dead ends: 6868 [2022-11-20 11:13:56,458 INFO L226 Difference]: Without dead ends: 6868 [2022-11-20 11:13:56,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:56,458 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:56,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 94 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 211 Unchecked, 2.2s Time] [2022-11-20 11:13:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6868 states. [2022-11-20 11:13:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6868 to 6635. [2022-11-20 11:13:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6630 states have (on average 4.6939668174962295) internal successors, (31121), 6634 states have internal predecessors, (31121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 31121 transitions. [2022-11-20 11:13:56,597 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 31121 transitions. Word has length 14 [2022-11-20 11:13:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:56,597 INFO L495 AbstractCegarLoop]: Abstraction has 6635 states and 31121 transitions. [2022-11-20 11:13:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 31121 transitions. [2022-11-20 11:13:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:13:56,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:56,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:56,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Ended with exit code 0 [2022-11-20 11:13:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:56,802 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:13:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 261701700, now seen corresponding path program 8 times [2022-11-20 11:13:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216136499] [2022-11-20 11:13:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:13:56,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:56,804 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:56,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-20 11:13:57,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:13:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:13:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:57,353 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:57,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:13:58,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:58,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216136499] [2022-11-20 11:13:58,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216136499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:58,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:58,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:13:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329614671] [2022-11-20 11:13:58,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:58,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:13:58,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:13:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:13:58,706 INFO L87 Difference]: Start difference. First operand 6635 states and 31121 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:59,927 INFO L93 Difference]: Finished difference Result 6730 states and 31337 transitions. [2022-11-20 11:13:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:13:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:13:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:59,949 INFO L225 Difference]: With dead ends: 6730 [2022-11-20 11:13:59,949 INFO L226 Difference]: Without dead ends: 6730 [2022-11-20 11:13:59,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:13:59,950 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:59,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 105 Unchecked, 0.7s Time] [2022-11-20 11:13:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2022-11-20 11:14:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 6635. [2022-11-20 11:14:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6630 states have (on average 4.6939668174962295) internal successors, (31121), 6634 states have internal predecessors, (31121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 31121 transitions. [2022-11-20 11:14:00,091 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 31121 transitions. Word has length 14 [2022-11-20 11:14:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:00,091 INFO L495 AbstractCegarLoop]: Abstraction has 6635 states and 31121 transitions. [2022-11-20 11:14:00,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 31121 transitions. [2022-11-20 11:14:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:14:00,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:00,095 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:00,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-20 11:14:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:00,295 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash -458996594, now seen corresponding path program 9 times [2022-11-20 11:14:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048217972] [2022-11-20 11:14:00,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:00,297 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:00,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-20 11:14:00,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:14:00,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:00,857 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:00,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:14:01,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:14:02,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:02,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048217972] [2022-11-20 11:14:02,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048217972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:02,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:02,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:02,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028763999] [2022-11-20 11:14:02,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:02,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:14:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:14:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:14:02,229 INFO L87 Difference]: Start difference. First operand 6635 states and 31121 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:04,786 INFO L93 Difference]: Finished difference Result 6753 states and 31382 transitions. [2022-11-20 11:14:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:14:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:14:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:04,809 INFO L225 Difference]: With dead ends: 6753 [2022-11-20 11:14:04,809 INFO L226 Difference]: Without dead ends: 6753 [2022-11-20 11:14:04,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:04,809 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:04,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 76 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 36 Unchecked, 2.1s Time] [2022-11-20 11:14:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2022-11-20 11:14:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 6634. [2022-11-20 11:14:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6629 states have (on average 4.694373208628752) internal successors, (31119), 6633 states have internal predecessors, (31119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 31119 transitions. [2022-11-20 11:14:04,995 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 31119 transitions. Word has length 14 [2022-11-20 11:14:04,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:04,996 INFO L495 AbstractCegarLoop]: Abstraction has 6634 states and 31119 transitions. [2022-11-20 11:14:04,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:04,996 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 31119 transitions. [2022-11-20 11:14:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:14:04,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:05,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:05,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-20 11:14:05,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:05,200 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:05,200 INFO L85 PathProgramCache]: Analyzing trace with hash -548120908, now seen corresponding path program 10 times [2022-11-20 11:14:05,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:05,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964010554] [2022-11-20 11:14:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:05,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:05,202 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-20 11:14:05,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:05,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:05,717 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:05,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:06,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:07,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:07,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964010554] [2022-11-20 11:14:07,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964010554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:07,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:07,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680072847] [2022-11-20 11:14:07,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:07,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:14:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:14:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:14:07,048 INFO L87 Difference]: Start difference. First operand 6634 states and 31119 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:09,901 INFO L93 Difference]: Finished difference Result 6887 states and 31771 transitions. [2022-11-20 11:14:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:14:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:14:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:09,925 INFO L225 Difference]: With dead ends: 6887 [2022-11-20 11:14:09,925 INFO L226 Difference]: Without dead ends: 6887 [2022-11-20 11:14:09,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:09,925 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:09,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 95 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 151 Unchecked, 2.4s Time] [2022-11-20 11:14:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-11-20 11:14:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6637. [2022-11-20 11:14:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 6632 states have (on average 4.69375753920386) internal successors, (31129), 6636 states have internal predecessors, (31129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 31129 transitions. [2022-11-20 11:14:10,187 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 31129 transitions. Word has length 14 [2022-11-20 11:14:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:10,187 INFO L495 AbstractCegarLoop]: Abstraction has 6637 states and 31129 transitions. [2022-11-20 11:14:10,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 31129 transitions. [2022-11-20 11:14:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:14:10,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:10,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:10,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Ended with exit code 0 [2022-11-20 11:14:10,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:10,394 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:10,395 INFO L85 PathProgramCache]: Analyzing trace with hash -547083028, now seen corresponding path program 11 times [2022-11-20 11:14:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:10,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417612579] [2022-11-20 11:14:10,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:10,396 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:10,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-20 11:14:10,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:14:10,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:10,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:10,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:11,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:13,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:13,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417612579] [2022-11-20 11:14:13,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417612579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:13,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:13,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-20 11:14:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686834844] [2022-11-20 11:14:13,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:14:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:14:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:13,062 INFO L87 Difference]: Start difference. First operand 6637 states and 31129 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:30,547 INFO L93 Difference]: Finished difference Result 10382 states and 46165 transitions. [2022-11-20 11:14:30,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:14:30,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:14:30,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:30,597 INFO L225 Difference]: With dead ends: 10382 [2022-11-20 11:14:30,598 INFO L226 Difference]: Without dead ends: 10382 [2022-11-20 11:14:30,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:14:30,598 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 412 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 848 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:30,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 187 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1059 Invalid, 0 Unknown, 848 Unchecked, 9.8s Time] [2022-11-20 11:14:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2022-11-20 11:14:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 6643. [2022-11-20 11:14:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6638 states have (on average 4.691623983127448) internal successors, (31143), 6642 states have internal predecessors, (31143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 31143 transitions. [2022-11-20 11:14:30,858 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 31143 transitions. Word has length 14 [2022-11-20 11:14:30,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:30,858 INFO L495 AbstractCegarLoop]: Abstraction has 6643 states and 31143 transitions. [2022-11-20 11:14:30,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 31143 transitions. [2022-11-20 11:14:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:14:30,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:30,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:30,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Ended with exit code 0 [2022-11-20 11:14:31,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:31,064 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1362949418, now seen corresponding path program 12 times [2022-11-20 11:14:31,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:31,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350262597] [2022-11-20 11:14:31,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:31,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:31,066 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:31,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-20 11:14:31,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:14:31,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:14:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:31,667 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:31,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:31,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:14:33,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:33,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350262597] [2022-11-20 11:14:33,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350262597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:33,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:33,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:33,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448809878] [2022-11-20 11:14:33,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:33,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:14:33,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:14:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:14:33,001 INFO L87 Difference]: Start difference. First operand 6643 states and 31143 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:34,290 INFO L93 Difference]: Finished difference Result 6722 states and 31328 transitions. [2022-11-20 11:14:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:14:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-20 11:14:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:34,313 INFO L225 Difference]: With dead ends: 6722 [2022-11-20 11:14:34,313 INFO L226 Difference]: Without dead ends: 6722 [2022-11-20 11:14:34,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:34,313 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:34,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 50 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 48 Unchecked, 0.8s Time] [2022-11-20 11:14:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6722 states. [2022-11-20 11:14:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6722 to 6644. [2022-11-20 11:14:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6644 states, 6639 states have (on average 4.691369182105738) internal successors, (31146), 6643 states have internal predecessors, (31146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 31146 transitions. [2022-11-20 11:14:34,555 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 31146 transitions. Word has length 14 [2022-11-20 11:14:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:34,555 INFO L495 AbstractCegarLoop]: Abstraction has 6644 states and 31146 transitions. [2022-11-20 11:14:34,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 31146 transitions. [2022-11-20 11:14:34,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:34,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:34,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:34,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:34,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:34,760 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1757433864, now seen corresponding path program 6 times [2022-11-20 11:14:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:34,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047970184] [2022-11-20 11:14:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:14:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:34,762 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:34,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-20 11:14:35,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:14:35,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:14:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:35,410 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:35,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:35,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:36,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047970184] [2022-11-20 11:14:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047970184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:36,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:36,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035956518] [2022-11-20 11:14:36,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:36,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:14:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:14:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:36,882 INFO L87 Difference]: Start difference. First operand 6644 states and 31146 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) [2022-11-20 11:14:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:38,285 INFO L93 Difference]: Finished difference Result 6909 states and 32316 transitions. [2022-11-20 11:14:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:38,286 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 [2022-11-20 11:14:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:38,309 INFO L225 Difference]: With dead ends: 6909 [2022-11-20 11:14:38,309 INFO L226 Difference]: Without dead ends: 6909 [2022-11-20 11:14:38,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:38,310 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:38,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 69 Unchecked, 0.9s Time] [2022-11-20 11:14:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6909 states. [2022-11-20 11:14:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6909 to 6701. [2022-11-20 11:14:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6701 states, 6696 states have (on average 4.694593787335723) internal successors, (31435), 6700 states have internal predecessors, (31435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6701 states to 6701 states and 31435 transitions. [2022-11-20 11:14:38,453 INFO L78 Accepts]: Start accepts. Automaton has 6701 states and 31435 transitions. Word has length 15 [2022-11-20 11:14:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:38,453 INFO L495 AbstractCegarLoop]: Abstraction has 6701 states and 31435 transitions. [2022-11-20 11:14:38,453 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) [2022-11-20 11:14:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6701 states and 31435 transitions. [2022-11-20 11:14:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:38,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:38,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:38,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-20 11:14:38,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:38,659 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1906888584, now seen corresponding path program 7 times [2022-11-20 11:14:38,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915216483] [2022-11-20 11:14:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:14:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:38,661 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:38,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-20 11:14:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:14:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:39,193 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:39,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:39,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:40,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:40,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915216483] [2022-11-20 11:14:40,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915216483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:40,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:40,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561239051] [2022-11-20 11:14:40,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:40,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:14:40,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:14:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:40,886 INFO L87 Difference]: Start difference. First operand 6701 states and 31435 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) [2022-11-20 11:14:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:43,038 INFO L93 Difference]: Finished difference Result 7053 states and 32891 transitions. [2022-11-20 11:14:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:14:43,040 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 [2022-11-20 11:14:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:43,063 INFO L225 Difference]: With dead ends: 7053 [2022-11-20 11:14:43,063 INFO L226 Difference]: Without dead ends: 7053 [2022-11-20 11:14:43,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:43,063 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:43,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 51 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 69 Unchecked, 1.5s Time] [2022-11-20 11:14:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7053 states. [2022-11-20 11:14:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7053 to 6765. [2022-11-20 11:14:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6760 states have (on average 4.691568047337278) internal successors, (31715), 6764 states have internal predecessors, (31715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 31715 transitions. [2022-11-20 11:14:43,208 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 31715 transitions. Word has length 15 [2022-11-20 11:14:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:43,209 INFO L495 AbstractCegarLoop]: Abstraction has 6765 states and 31715 transitions. [2022-11-20 11:14:43,209 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) [2022-11-20 11:14:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 31715 transitions. [2022-11-20 11:14:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:43,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:43,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:43,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Ended with exit code 0 [2022-11-20 11:14:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:43,415 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1623247642, now seen corresponding path program 8 times [2022-11-20 11:14:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:43,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834407971] [2022-11-20 11:14:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:43,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:43,416 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:43,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-20 11:14:43,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:14:43,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:43,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:43,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:44,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:45,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834407971] [2022-11-20 11:14:45,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834407971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:45,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:45,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:45,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904256759] [2022-11-20 11:14:45,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:45,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:14:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:14:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:45,389 INFO L87 Difference]: Start difference. First operand 6765 states and 31715 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) [2022-11-20 11:14:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:46,617 INFO L93 Difference]: Finished difference Result 6800 states and 31872 transitions. [2022-11-20 11:14:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:14:46,619 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 [2022-11-20 11:14:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:46,642 INFO L225 Difference]: With dead ends: 6800 [2022-11-20 11:14:46,642 INFO L226 Difference]: Without dead ends: 6800 [2022-11-20 11:14:46,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:46,643 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:46,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 16 Unchecked, 0.7s Time] [2022-11-20 11:14:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2022-11-20 11:14:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 6767. [2022-11-20 11:14:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6762 states have (on average 4.691659272404614) internal successors, (31725), 6766 states have internal predecessors, (31725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 31725 transitions. [2022-11-20 11:14:46,958 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 31725 transitions. Word has length 15 [2022-11-20 11:14:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:46,959 INFO L495 AbstractCegarLoop]: Abstraction has 6767 states and 31725 transitions. [2022-11-20 11:14:46,959 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) [2022-11-20 11:14:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 31725 transitions. [2022-11-20 11:14:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:46,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:46,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:46,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:47,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:47,183 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash -652998210, now seen corresponding path program 9 times [2022-11-20 11:14:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391051057] [2022-11-20 11:14:47,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:47,184 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 [2022-11-20 11:14:47,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:47,185 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:47,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-20 11:14:47,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:14:47,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:14:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:47,807 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:47,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:48,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:49,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:49,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391051057] [2022-11-20 11:14:49,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391051057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:49,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:49,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:49,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869699054] [2022-11-20 11:14:49,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:49,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:14:49,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:14:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:49,215 INFO L87 Difference]: Start difference. First operand 6767 states and 31725 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) [2022-11-20 11:14:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:50,639 INFO L93 Difference]: Finished difference Result 7006 states and 32732 transitions. [2022-11-20 11:14:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:50,641 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 [2022-11-20 11:14:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:50,663 INFO L225 Difference]: With dead ends: 7006 [2022-11-20 11:14:50,663 INFO L226 Difference]: Without dead ends: 7006 [2022-11-20 11:14:50,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:50,664 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:50,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 62 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 70 Unchecked, 0.9s Time] [2022-11-20 11:14:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-11-20 11:14:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 6779. [2022-11-20 11:14:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6774 states have (on average 4.69279598464718) internal successors, (31789), 6778 states have internal predecessors, (31789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 31789 transitions. [2022-11-20 11:14:50,810 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 31789 transitions. Word has length 15 [2022-11-20 11:14:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:50,810 INFO L495 AbstractCegarLoop]: Abstraction has 6779 states and 31789 transitions. [2022-11-20 11:14:50,810 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) [2022-11-20 11:14:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 31789 transitions. [2022-11-20 11:14:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:50,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:50,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:50,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-20 11:14:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:51,017 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:51,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash -648327750, now seen corresponding path program 10 times [2022-11-20 11:14:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:51,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145626185] [2022-11-20 11:14:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:14:51,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:51,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:51,018 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:51,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-20 11:14:51,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:14:51,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:14:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:51,567 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:51,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:14:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:52,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:53,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145626185] [2022-11-20 11:14:53,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145626185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:53,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:53,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:14:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400400126] [2022-11-20 11:14:53,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:14:53,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:14:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:14:53,369 INFO L87 Difference]: Start difference. First operand 6779 states and 31789 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) [2022-11-20 11:14:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:55,526 INFO L93 Difference]: Finished difference Result 7217 states and 33641 transitions. [2022-11-20 11:14:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:55,528 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 [2022-11-20 11:14:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:55,551 INFO L225 Difference]: With dead ends: 7217 [2022-11-20 11:14:55,552 INFO L226 Difference]: Without dead ends: 7217 [2022-11-20 11:14:55,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:55,552 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:55,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 61 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 65 Unchecked, 1.4s Time] [2022-11-20 11:14:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2022-11-20 11:14:55,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 6783. [2022-11-20 11:14:55,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6783 states, 6778 states have (on average 4.692977279433461) internal successors, (31809), 6782 states have internal predecessors, (31809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6783 states to 6783 states and 31809 transitions. [2022-11-20 11:14:55,702 INFO L78 Accepts]: Start accepts. Automaton has 6783 states and 31809 transitions. Word has length 15 [2022-11-20 11:14:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 6783 states and 31809 transitions. [2022-11-20 11:14:55,703 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) [2022-11-20 11:14:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6783 states and 31809 transitions. [2022-11-20 11:14:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:14:55,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:55,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:55,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Ended with exit code 0 [2022-11-20 11:14:55,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:55,909 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:14:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash -648177090, now seen corresponding path program 11 times [2022-11-20 11:14:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463462723] [2022-11-20 11:14:55,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:14:55,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:55,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:55,911 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:55,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-20 11:14:56,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:14:56,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:14:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:56,490 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:56,490 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 [2022-11-20 11:14:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:58,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:58,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463462723] [2022-11-20 11:14:58,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463462723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:58,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:58,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:14:58,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773612376] [2022-11-20 11:14:58,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:58,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:14:58,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:58,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:14:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:58,258 INFO L87 Difference]: Start difference. First operand 6783 states and 31809 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) [2022-11-20 11:15:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:03,929 INFO L93 Difference]: Finished difference Result 8068 states and 36918 transitions. [2022-11-20 11:15:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:15:03,930 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 [2022-11-20 11:15:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:03,958 INFO L225 Difference]: With dead ends: 8068 [2022-11-20 11:15:03,958 INFO L226 Difference]: Without dead ends: 8068 [2022-11-20 11:15:03,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:15:03,959 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:03,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 96 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 468 Invalid, 0 Unknown, 259 Unchecked, 3.6s Time] [2022-11-20 11:15:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2022-11-20 11:15:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7037. [2022-11-20 11:15:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7032 states have (on average 4.696103526734926) internal successors, (33023), 7036 states have internal predecessors, (33023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 33023 transitions. [2022-11-20 11:15:04,186 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 33023 transitions. Word has length 15 [2022-11-20 11:15:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:04,186 INFO L495 AbstractCegarLoop]: Abstraction has 7037 states and 33023 transitions. [2022-11-20 11:15:04,186 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) [2022-11-20 11:15:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 33023 transitions. [2022-11-20 11:15:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:04,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:04,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:04,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Ended with exit code 0 [2022-11-20 11:15:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:04,394 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:15:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1993058146, now seen corresponding path program 16 times [2022-11-20 11:15:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789644325] [2022-11-20 11:15:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:04,396 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-20 11:15:04,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:04,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:04,950 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:04,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:05,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:06,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789644325] [2022-11-20 11:15:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789644325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:06,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:06,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:15:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145277765] [2022-11-20 11:15:06,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:15:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:15:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:15:06,694 INFO L87 Difference]: Start difference. First operand 7037 states and 33023 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) [2022-11-20 11:15:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:08,380 INFO L93 Difference]: Finished difference Result 7259 states and 34074 transitions. [2022-11-20 11:15:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:15:08,381 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 [2022-11-20 11:15:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:08,404 INFO L225 Difference]: With dead ends: 7259 [2022-11-20 11:15:08,404 INFO L226 Difference]: Without dead ends: 7259 [2022-11-20 11:15:08,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:15:08,405 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:08,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 46 Unchecked, 1.0s Time] [2022-11-20 11:15:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7259 states. [2022-11-20 11:15:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7259 to 7148. [2022-11-20 11:15:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 7143 states have (on average 4.701805963880722) internal successors, (33585), 7147 states have internal predecessors, (33585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 33585 transitions. [2022-11-20 11:15:08,556 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 33585 transitions. Word has length 15 [2022-11-20 11:15:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:08,556 INFO L495 AbstractCegarLoop]: Abstraction has 7148 states and 33585 transitions. [2022-11-20 11:15:08,557 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) [2022-11-20 11:15:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 33585 transitions. [2022-11-20 11:15:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:08,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:08,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:08,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-20 11:15:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:08,762 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:15:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1990376956, now seen corresponding path program 17 times [2022-11-20 11:15:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049226817] [2022-11-20 11:15:08,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:08,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:08,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:08,764 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:08,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-20 11:15:09,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:15:09,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:15:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:09,397 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:09,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:09,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:11,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:11,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049226817] [2022-11-20 11:15:11,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049226817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:11,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:11,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:15:11,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661630920] [2022-11-20 11:15:11,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:11,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:15:11,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:15:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:15:11,177 INFO L87 Difference]: Start difference. First operand 7148 states and 33585 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) [2022-11-20 11:15:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:12,692 INFO L93 Difference]: Finished difference Result 7407 states and 34752 transitions. [2022-11-20 11:15:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:15:12,693 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 [2022-11-20 11:15:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:12,718 INFO L225 Difference]: With dead ends: 7407 [2022-11-20 11:15:12,719 INFO L226 Difference]: Without dead ends: 7407 [2022-11-20 11:15:12,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:15:12,719 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:12,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 63 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2022-11-20 11:15:12,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7407 states. [2022-11-20 11:15:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7407 to 7302. [2022-11-20 11:15:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7302 states, 7297 states have (on average 4.712895710565986) internal successors, (34390), 7301 states have internal predecessors, (34390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7302 states to 7302 states and 34390 transitions. [2022-11-20 11:15:12,887 INFO L78 Accepts]: Start accepts. Automaton has 7302 states and 34390 transitions. Word has length 15 [2022-11-20 11:15:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:12,887 INFO L495 AbstractCegarLoop]: Abstraction has 7302 states and 34390 transitions. [2022-11-20 11:15:12,887 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) [2022-11-20 11:15:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7302 states and 34390 transitions. [2022-11-20 11:15:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:12,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:12,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:12,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-20 11:15:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:13,095 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:15:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash -315860190, now seen corresponding path program 12 times [2022-11-20 11:15:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255835706] [2022-11-20 11:15:13,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:15:13,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:13,097 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-20 11:15:13,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:15:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:13,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:15:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:13,695 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:13,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:14,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:15,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:15,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255835706] [2022-11-20 11:15:15,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255835706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:15,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:15,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:15:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236047632] [2022-11-20 11:15:15,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:15:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:15:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:15:15,176 INFO L87 Difference]: Start difference. First operand 7302 states and 34390 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) [2022-11-20 11:15:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:17,844 INFO L93 Difference]: Finished difference Result 8026 states and 37507 transitions. [2022-11-20 11:15:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:15:17,845 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 [2022-11-20 11:15:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:17,869 INFO L225 Difference]: With dead ends: 8026 [2022-11-20 11:15:17,869 INFO L226 Difference]: Without dead ends: 8026 [2022-11-20 11:15:17,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:15:17,870 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:17,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 43 Unchecked, 1.8s Time] [2022-11-20 11:15:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2022-11-20 11:15:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7358. [2022-11-20 11:15:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7358 states, 7353 states have (on average 4.7156262749898) internal successors, (34674), 7357 states have internal predecessors, (34674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7358 states to 7358 states and 34674 transitions. [2022-11-20 11:15:18,068 INFO L78 Accepts]: Start accepts. Automaton has 7358 states and 34674 transitions. Word has length 15 [2022-11-20 11:15:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 7358 states and 34674 transitions. [2022-11-20 11:15:18,069 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) [2022-11-20 11:15:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7358 states and 34674 transitions. [2022-11-20 11:15:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:18,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:18,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:18,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-20 11:15:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:18,275 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:15:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1092780339, now seen corresponding path program 4 times [2022-11-20 11:15:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:18,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629351180] [2022-11-20 11:15:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:15:18,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:18,277 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:18,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-20 11:15:18,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:15:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:18,823 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:18,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:19,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:21,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629351180] [2022-11-20 11:15:21,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629351180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:21,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:21,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:15:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408751792] [2022-11-20 11:15:21,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:21,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:15:21,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:15:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:15:21,339 INFO L87 Difference]: Start difference. First operand 7358 states and 34674 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) [2022-11-20 11:15:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:35,247 INFO L93 Difference]: Finished difference Result 18398 states and 87137 transitions. [2022-11-20 11:15:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:15:35,249 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 [2022-11-20 11:15:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:35,323 INFO L225 Difference]: With dead ends: 18398 [2022-11-20 11:15:35,323 INFO L226 Difference]: Without dead ends: 18398 [2022-11-20 11:15:35,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=522, Invalid=1284, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:15:35,324 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 447 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:35,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 55 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 712 Invalid, 0 Unknown, 154 Unchecked, 4.5s Time] [2022-11-20 11:15:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18398 states. [2022-11-20 11:15:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18398 to 9434. [2022-11-20 11:15:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9434 states, 9429 states have (on average 5.009863188036907) internal successors, (47238), 9433 states have internal predecessors, (47238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9434 states to 9434 states and 47238 transitions. [2022-11-20 11:15:35,662 INFO L78 Accepts]: Start accepts. Automaton has 9434 states and 47238 transitions. Word has length 15 [2022-11-20 11:15:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:35,663 INFO L495 AbstractCegarLoop]: Abstraction has 9434 states and 47238 transitions. [2022-11-20 11:15:35,663 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) [2022-11-20 11:15:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9434 states and 47238 transitions. [2022-11-20 11:15:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:35,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:35,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:35,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-20 11:15:35,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:35,871 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:15:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:35,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1254545469, now seen corresponding path program 5 times [2022-11-20 11:15:35,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:35,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872094841] [2022-11-20 11:15:35,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:15:35,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:35,872 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:35,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-20 11:15:36,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:15:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:36,448 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:36,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:37,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:15:39,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:39,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872094841] [2022-11-20 11:15:39,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872094841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:39,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:39,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:15:39,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583673943] [2022-11-20 11:15:39,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:15:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:15:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:15:39,874 INFO L87 Difference]: Start difference. First operand 9434 states and 47238 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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) [2022-11-20 11:16:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:15,825 INFO L93 Difference]: Finished difference Result 20822 states and 101430 transitions. [2022-11-20 11:16:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 11:16:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:16:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:15,917 INFO L225 Difference]: With dead ends: 20822 [2022-11-20 11:16:15,917 INFO L226 Difference]: Without dead ends: 20822 [2022-11-20 11:16:15,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=862, Invalid=3968, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 11:16:15,918 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 819 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:15,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 187 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1962 Invalid, 0 Unknown, 195 Unchecked, 12.9s Time] [2022-11-20 11:16:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20822 states. [2022-11-20 11:16:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20822 to 11056. [2022-11-20 11:16:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11056 states, 11051 states have (on average 5.1527463577956745) internal successors, (56943), 11055 states have internal predecessors, (56943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11056 states to 11056 states and 56943 transitions. [2022-11-20 11:16:16,411 INFO L78 Accepts]: Start accepts. Automaton has 11056 states and 56943 transitions. Word has length 15 [2022-11-20 11:16:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:16,411 INFO L495 AbstractCegarLoop]: Abstraction has 11056 states and 56943 transitions. [2022-11-20 11:16:16,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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) [2022-11-20 11:16:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11056 states and 56943 transitions. [2022-11-20 11:16:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:16:16,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:16,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:16,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:16,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:16,620 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:16:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:16,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1259893868, now seen corresponding path program 4 times [2022-11-20 11:16:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727608937] [2022-11-20 11:16:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:16,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:16,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:16,622 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:16,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-20 11:16:17,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:16:17,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:17,172 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:17,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:16:17,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:16:18,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727608937] [2022-11-20 11:16:18,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727608937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:18,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:18,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:16:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646512722] [2022-11-20 11:16:18,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:16:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:16:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:16:18,716 INFO L87 Difference]: Start difference. First operand 11056 states and 56943 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:19,903 INFO L93 Difference]: Finished difference Result 11313 states and 58068 transitions. [2022-11-20 11:16:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:16:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:16:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:19,952 INFO L225 Difference]: With dead ends: 11313 [2022-11-20 11:16:19,952 INFO L226 Difference]: Without dead ends: 11313 [2022-11-20 11:16:19,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:16:19,952 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:19,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-11-20 11:16:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-11-20 11:16:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11072. [2022-11-20 11:16:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11072 states, 11067 states have (on average 5.152886961236107) internal successors, (57027), 11071 states have internal predecessors, (57027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11072 states to 11072 states and 57027 transitions. [2022-11-20 11:16:20,338 INFO L78 Accepts]: Start accepts. Automaton has 11072 states and 57027 transitions. Word has length 15 [2022-11-20 11:16:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:20,339 INFO L495 AbstractCegarLoop]: Abstraction has 11072 states and 57027 transitions. [2022-11-20 11:16:20,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 11072 states and 57027 transitions. [2022-11-20 11:16:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:16:20,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:20,346 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:20,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:20,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:20,547 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:16:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -82861522, now seen corresponding path program 9 times [2022-11-20 11:16:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82085789] [2022-11-20 11:16:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:20,549 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:20,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-20 11:16:21,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:16:21,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:16:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:21,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:21,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:21,823 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 [2022-11-20 11:16:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:23,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:23,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82085789] [2022-11-20 11:16:23,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82085789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:23,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:23,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:16:23,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195646018] [2022-11-20 11:16:23,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:23,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:16:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:16:23,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:16:23,032 INFO L87 Difference]: Start difference. First operand 11072 states and 57027 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:34,548 INFO L93 Difference]: Finished difference Result 12338 states and 60806 transitions. [2022-11-20 11:16:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:16:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:16:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:34,595 INFO L225 Difference]: With dead ends: 12338 [2022-11-20 11:16:34,595 INFO L226 Difference]: Without dead ends: 12338 [2022-11-20 11:16:34,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 11:16:34,596 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 588 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:34,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 115 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 986 Invalid, 0 Unknown, 395 Unchecked, 7.3s Time] [2022-11-20 11:16:34,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-11-20 11:16:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 10098. [2022-11-20 11:16:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10098 states, 10093 states have (on average 5.2323392450213015) internal successors, (52810), 10097 states have internal predecessors, (52810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10098 states to 10098 states and 52810 transitions. [2022-11-20 11:16:34,880 INFO L78 Accepts]: Start accepts. Automaton has 10098 states and 52810 transitions. Word has length 15 [2022-11-20 11:16:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:34,880 INFO L495 AbstractCegarLoop]: Abstraction has 10098 states and 52810 transitions. [2022-11-20 11:16:34,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10098 states and 52810 transitions. [2022-11-20 11:16:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:16:34,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:34,886 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:34,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Ended with exit code 0 [2022-11-20 11:16:35,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:35,087 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:16:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -499509149, now seen corresponding path program 7 times [2022-11-20 11:16:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:35,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242803126] [2022-11-20 11:16:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:16:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:35,089 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:35,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-20 11:16:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:16:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:35,684 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:35,685 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 [2022-11-20 11:16:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:36,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:38,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242803126] [2022-11-20 11:16:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242803126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:38,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:38,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:16:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643310868] [2022-11-20 11:16:38,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:16:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:16:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:16:38,216 INFO L87 Difference]: Start difference. First operand 10098 states and 52810 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:16:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:47,015 INFO L93 Difference]: Finished difference Result 10631 states and 54340 transitions. [2022-11-20 11:16:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:16:47,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:16:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:47,058 INFO L225 Difference]: With dead ends: 10631 [2022-11-20 11:16:47,058 INFO L226 Difference]: Without dead ends: 10631 [2022-11-20 11:16:47,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:16:47,058 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 340 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:47,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 209 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 819 Invalid, 0 Unknown, 204 Unchecked, 5.1s Time] [2022-11-20 11:16:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-11-20 11:16:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 10128. [2022-11-20 11:16:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10128 states, 10123 states have (on average 5.229872567420725) internal successors, (52942), 10127 states have internal predecessors, (52942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 52942 transitions. [2022-11-20 11:16:47,449 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 52942 transitions. Word has length 15 [2022-11-20 11:16:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:47,449 INFO L495 AbstractCegarLoop]: Abstraction has 10128 states and 52942 transitions. [2022-11-20 11:16:47,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:16:47,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 52942 transitions. [2022-11-20 11:16:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:16:47,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:47,455 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:47,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Ended with exit code 0 [2022-11-20 11:16:47,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:47,655 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:16:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash -498914503, now seen corresponding path program 8 times [2022-11-20 11:16:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699279911] [2022-11-20 11:16:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:47,657 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:47,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-20 11:16:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:48,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:16:48,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:48,241 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:48,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:48,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:50,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:50,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699279911] [2022-11-20 11:16:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699279911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:50,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:50,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:16:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378999537] [2022-11-20 11:16:50,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:50,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:16:50,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:16:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:16:50,785 INFO L87 Difference]: Start difference. First operand 10128 states and 52942 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:16:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:57,433 INFO L93 Difference]: Finished difference Result 10740 states and 54943 transitions. [2022-11-20 11:16:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:16:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:16:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:57,579 INFO L225 Difference]: With dead ends: 10740 [2022-11-20 11:16:57,579 INFO L226 Difference]: Without dead ends: 10740 [2022-11-20 11:16:57,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:16:57,580 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:57,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 208 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 573 Invalid, 0 Unknown, 204 Unchecked, 3.7s Time] [2022-11-20 11:16:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10740 states. [2022-11-20 11:16:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10740 to 10175. [2022-11-20 11:16:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10175 states, 10170 states have (on average 5.225368731563422) internal successors, (53142), 10174 states have internal predecessors, (53142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10175 states to 10175 states and 53142 transitions. [2022-11-20 11:16:57,818 INFO L78 Accepts]: Start accepts. Automaton has 10175 states and 53142 transitions. Word has length 15 [2022-11-20 11:16:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:57,818 INFO L495 AbstractCegarLoop]: Abstraction has 10175 states and 53142 transitions. [2022-11-20 11:16:57,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:16:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10175 states and 53142 transitions. [2022-11-20 11:16:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:16:57,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:57,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:57,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-20 11:16:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:58,024 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:16:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash -654989459, now seen corresponding path program 8 times [2022-11-20 11:16:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847906982] [2022-11-20 11:16:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:58,026 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:58,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-20 11:16:58,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:58,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:16:58,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:58,599 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:58,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:59,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:00,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847906982] [2022-11-20 11:17:00,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847906982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:00,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:00,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:17:00,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627061937] [2022-11-20 11:17:00,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:00,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:17:00,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:17:00,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:00,575 INFO L87 Difference]: Start difference. First operand 10175 states and 53142 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:13,718 INFO L93 Difference]: Finished difference Result 19683 states and 102277 transitions. [2022-11-20 11:17:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:17:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:17:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:13,916 INFO L225 Difference]: With dead ends: 19683 [2022-11-20 11:17:13,916 INFO L226 Difference]: Without dead ends: 19683 [2022-11-20 11:17:13,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:17:13,917 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 666 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 789 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:13,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 111 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 867 Invalid, 0 Unknown, 789 Unchecked, 6.4s Time] [2022-11-20 11:17:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19683 states. [2022-11-20 11:17:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19683 to 10438. [2022-11-20 11:17:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10433 states have (on average 5.215374293108406) internal successors, (54412), 10437 states have internal predecessors, (54412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 54412 transitions. [2022-11-20 11:17:14,280 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 54412 transitions. Word has length 15 [2022-11-20 11:17:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:14,280 INFO L495 AbstractCegarLoop]: Abstraction has 10438 states and 54412 transitions. [2022-11-20 11:17:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 54412 transitions. [2022-11-20 11:17:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:17:14,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:14,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:14,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Ended with exit code 0 [2022-11-20 11:17:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:14,486 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:17:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash -865820459, now seen corresponding path program 9 times [2022-11-20 11:17:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:14,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194623715] [2022-11-20 11:17:14,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:17:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:14,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:14,488 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:14,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-20 11:17:14,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:17:14,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:17:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:15,189 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:15,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:15,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:17,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194623715] [2022-11-20 11:17:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194623715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:17,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:17,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:17:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818296112] [2022-11-20 11:17:17,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:17,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:17:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:17:17,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:17,174 INFO L87 Difference]: Start difference. First operand 10438 states and 54412 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:29,962 INFO L93 Difference]: Finished difference Result 13653 states and 67863 transitions. [2022-11-20 11:17:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:17:29,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:17:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:30,009 INFO L225 Difference]: With dead ends: 13653 [2022-11-20 11:17:30,009 INFO L226 Difference]: Without dead ends: 13653 [2022-11-20 11:17:30,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:17:30,010 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 483 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:30,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 132 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 990 Invalid, 0 Unknown, 782 Unchecked, 7.6s Time] [2022-11-20 11:17:30,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2022-11-20 11:17:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 10375. [2022-11-20 11:17:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10375 states, 10370 states have (on average 5.2232401157184185) internal successors, (54165), 10374 states have internal predecessors, (54165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10375 states to 10375 states and 54165 transitions. [2022-11-20 11:17:30,420 INFO L78 Accepts]: Start accepts. Automaton has 10375 states and 54165 transitions. Word has length 15 [2022-11-20 11:17:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 10375 states and 54165 transitions. [2022-11-20 11:17:30,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10375 states and 54165 transitions. [2022-11-20 11:17:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:17:30,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:30,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:30,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Ended with exit code 0 [2022-11-20 11:17:30,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:30,661 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:17:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1963718155, now seen corresponding path program 10 times [2022-11-20 11:17:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:30,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562697520] [2022-11-20 11:17:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:30,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:30,664 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:30,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-20 11:17:31,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:17:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:31,447 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:31,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:17:31,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:17:33,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562697520] [2022-11-20 11:17:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562697520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:33,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:17:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961999007] [2022-11-20 11:17:33,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:17:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:17:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:17:33,060 INFO L87 Difference]: Start difference. First operand 10375 states and 54165 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:34,764 INFO L93 Difference]: Finished difference Result 15181 states and 80912 transitions. [2022-11-20 11:17:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:17:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:17:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:34,832 INFO L225 Difference]: With dead ends: 15181 [2022-11-20 11:17:34,832 INFO L226 Difference]: Without dead ends: 15181 [2022-11-20 11:17:34,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:17:34,832 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:34,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 30 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 97 Unchecked, 1.3s Time] [2022-11-20 11:17:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15181 states. [2022-11-20 11:17:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15181 to 12161. [2022-11-20 11:17:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12161 states, 12156 states have (on average 5.310957551826259) internal successors, (64560), 12160 states have internal predecessors, (64560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12161 states to 12161 states and 64560 transitions. [2022-11-20 11:17:35,349 INFO L78 Accepts]: Start accepts. Automaton has 12161 states and 64560 transitions. Word has length 15 [2022-11-20 11:17:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:35,349 INFO L495 AbstractCegarLoop]: Abstraction has 12161 states and 64560 transitions. [2022-11-20 11:17:35,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 12161 states and 64560 transitions. [2022-11-20 11:17:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:17:35,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:35,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:35,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:35,556 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:17:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1968633670, now seen corresponding path program 10 times [2022-11-20 11:17:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424094905] [2022-11-20 11:17:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:35,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:35,558 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:35,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-20 11:17:35,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:35,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:17:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:36,149 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:36,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:17:36,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:17:38,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:38,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424094905] [2022-11-20 11:17:38,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424094905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:38,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:38,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:17:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72626361] [2022-11-20 11:17:38,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:17:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:17:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:17:38,296 INFO L87 Difference]: Start difference. First operand 12161 states and 64560 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) [2022-11-20 11:17:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:47,668 INFO L93 Difference]: Finished difference Result 18393 states and 95381 transitions. [2022-11-20 11:17:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:17:47,670 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 [2022-11-20 11:17:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:47,748 INFO L225 Difference]: With dead ends: 18393 [2022-11-20 11:17:47,748 INFO L226 Difference]: Without dead ends: 18393 [2022-11-20 11:17:47,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:17:47,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 99 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:47,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 30 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 602 Invalid, 0 Unknown, 116 Unchecked, 5.0s Time] [2022-11-20 11:17:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18393 states. [2022-11-20 11:17:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18393 to 12408. [2022-11-20 11:17:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12408 states, 12403 states have (on average 5.3085543820043535) internal successors, (65842), 12407 states have internal predecessors, (65842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12408 states to 12408 states and 65842 transitions. [2022-11-20 11:17:48,152 INFO L78 Accepts]: Start accepts. Automaton has 12408 states and 65842 transitions. Word has length 15 [2022-11-20 11:17:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:48,153 INFO L495 AbstractCegarLoop]: Abstraction has 12408 states and 65842 transitions. [2022-11-20 11:17:48,153 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) [2022-11-20 11:17:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12408 states and 65842 transitions. [2022-11-20 11:17:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:17:48,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:48,158 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:48,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Ended with exit code 0 [2022-11-20 11:17:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:48,359 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:17:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 199911071, now seen corresponding path program 11 times [2022-11-20 11:17:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361285572] [2022-11-20 11:17:48,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:48,360 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 [2022-11-20 11:17:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:48,361 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:48,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2022-11-20 11:17:48,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:17:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:17:48,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:48,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:48,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:49,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:51,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:51,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361285572] [2022-11-20 11:17:51,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361285572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:51,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:51,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:17:51,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066597381] [2022-11-20 11:17:51,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:51,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:17:51,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:17:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:17:51,375 INFO L87 Difference]: Start difference. First operand 12408 states and 65842 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:18:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:07,304 INFO L93 Difference]: Finished difference Result 19274 states and 99360 transitions. [2022-11-20 11:18:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 11:18:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:18:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:07,521 INFO L225 Difference]: With dead ends: 19274 [2022-11-20 11:18:07,522 INFO L226 Difference]: Without dead ends: 19274 [2022-11-20 11:18:07,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:18:07,522 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 728 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:07,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 211 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1021 Invalid, 0 Unknown, 435 Unchecked, 7.8s Time] [2022-11-20 11:18:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19274 states. [2022-11-20 11:18:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19274 to 13846. [2022-11-20 11:18:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13846 states, 13841 states have (on average 5.28234954121812) internal successors, (73113), 13845 states have internal predecessors, (73113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13846 states to 13846 states and 73113 transitions. [2022-11-20 11:18:07,931 INFO L78 Accepts]: Start accepts. Automaton has 13846 states and 73113 transitions. Word has length 15 [2022-11-20 11:18:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:07,931 INFO L495 AbstractCegarLoop]: Abstraction has 13846 states and 73113 transitions. [2022-11-20 11:18:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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) [2022-11-20 11:18:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13846 states and 73113 transitions. [2022-11-20 11:18:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:18:07,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:07,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:07,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Ended with exit code 0 [2022-11-20 11:18:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:08,138 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:18:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 199911164, now seen corresponding path program 12 times [2022-11-20 11:18:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:18:08,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414304901] [2022-11-20 11:18:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:18:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:18:08,140 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:18:08,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-20 11:18:08,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:18:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:18:08,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:08,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:18:08,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:18:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:18:09,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:18:11,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:18:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414304901] [2022-11-20 11:18:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414304901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:11,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:18:11,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:18:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781232379] [2022-11-20 11:18:11,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:18:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:18:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:18:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:18:11,108 INFO L87 Difference]: Start difference. First operand 13846 states and 73113 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) [2022-11-20 11:18:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:15,991 INFO L93 Difference]: Finished difference Result 17054 states and 90244 transitions. [2022-11-20 11:18:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:18:15,992 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 [2022-11-20 11:18:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:16,058 INFO L225 Difference]: With dead ends: 17054 [2022-11-20 11:18:16,058 INFO L226 Difference]: Without dead ends: 17054 [2022-11-20 11:18:16,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:18:16,058 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 91 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:16,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 47 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 280 Unchecked, 3.0s Time] [2022-11-20 11:18:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17054 states. [2022-11-20 11:18:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17054 to 14665. [2022-11-20 11:18:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14665 states, 14660 states have (on average 5.303819918144611) internal successors, (77754), 14664 states have internal predecessors, (77754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14665 states to 14665 states and 77754 transitions. [2022-11-20 11:18:16,588 INFO L78 Accepts]: Start accepts. Automaton has 14665 states and 77754 transitions. Word has length 15 [2022-11-20 11:18:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:16,588 INFO L495 AbstractCegarLoop]: Abstraction has 14665 states and 77754 transitions. [2022-11-20 11:18:16,589 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) [2022-11-20 11:18:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14665 states and 77754 transitions. [2022-11-20 11:18:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:18:16,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:16,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:16,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Ended with exit code 0 [2022-11-20 11:18:16,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:16,795 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:18:16,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 212691410, now seen corresponding path program 6 times [2022-11-20 11:18:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:18:16,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286140659] [2022-11-20 11:18:16,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:18:16,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:16,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:18:16,796 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:18:16,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-20 11:18:17,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 11:18:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:18:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:17,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:18:17,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:18:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:18:18,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:18:19,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:18:19,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286140659] [2022-11-20 11:18:19,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286140659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:19,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:18:19,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 11:18:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702804610] [2022-11-20 11:18:19,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:18:19,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:18:19,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:18:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:18:19,667 INFO L87 Difference]: Start difference. First operand 14665 states and 77754 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:53,104 INFO L93 Difference]: Finished difference Result 25982 states and 129482 transitions. [2022-11-20 11:18:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 11:18:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:18:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:53,358 INFO L225 Difference]: With dead ends: 25982 [2022-11-20 11:18:53,358 INFO L226 Difference]: Without dead ends: 25982 [2022-11-20 11:18:53,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=975, Invalid=3315, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 11:18:53,359 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 794 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:53,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 23 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1020 Invalid, 0 Unknown, 688 Unchecked, 8.9s Time] [2022-11-20 11:18:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25982 states. [2022-11-20 11:18:53,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25982 to 9600. [2022-11-20 11:18:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9600 states, 9595 states have (on average 5.044293903074518) internal successors, (48400), 9599 states have internal predecessors, (48400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9600 states to 9600 states and 48400 transitions. [2022-11-20 11:18:53,733 INFO L78 Accepts]: Start accepts. Automaton has 9600 states and 48400 transitions. Word has length 15 [2022-11-20 11:18:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:53,733 INFO L495 AbstractCegarLoop]: Abstraction has 9600 states and 48400 transitions. [2022-11-20 11:18:53,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 9600 states and 48400 transitions. [2022-11-20 11:18:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:18:53,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:53,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:53,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:53,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:53,952 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:18:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1595276028, now seen corresponding path program 13 times [2022-11-20 11:18:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:18:53,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182534750] [2022-11-20 11:18:53,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:18:53,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:18:53,954 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:18:53,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2022-11-20 11:18:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:18:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:54,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:18:54,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:18:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:18:54,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:18:56,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:18:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182534750] [2022-11-20 11:18:56,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182534750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:56,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:18:56,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:18:56,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482602304] [2022-11-20 11:18:56,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:56,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:18:56,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:18:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:18:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:18:56,117 INFO L87 Difference]: Start difference. First operand 9600 states and 48400 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) [2022-11-20 11:18:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:57,610 INFO L93 Difference]: Finished difference Result 9840 states and 49517 transitions. [2022-11-20 11:18:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:18:57,612 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 [2022-11-20 11:18:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:57,644 INFO L225 Difference]: With dead ends: 9840 [2022-11-20 11:18:57,645 INFO L226 Difference]: Without dead ends: 9840 [2022-11-20 11:18:57,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:18:57,645 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:57,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 28 Unchecked, 0.8s Time] [2022-11-20 11:18:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9840 states. [2022-11-20 11:18:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9840 to 9688. [2022-11-20 11:18:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 9683 states have (on average 5.040793142621088) internal successors, (48810), 9687 states have internal predecessors, (48810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 48810 transitions. [2022-11-20 11:18:57,866 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 48810 transitions. Word has length 16 [2022-11-20 11:18:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:57,866 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 48810 transitions. [2022-11-20 11:18:57,866 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) [2022-11-20 11:18:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 48810 transitions. [2022-11-20 11:18:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:18:57,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:57,872 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:57,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Ended with exit code 0 [2022-11-20 11:18:58,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:18:58,072 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:18:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1595278818, now seen corresponding path program 14 times [2022-11-20 11:18:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:18:58,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656778817] [2022-11-20 11:18:58,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:18:58,073 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 [2022-11-20 11:18:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:18:58,074 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:18:58,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Waiting until timeout for monitored process [2022-11-20 11:18:58,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:18:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:18:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:18:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:58,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:18:58,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:18:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:18:59,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:00,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656778817] [2022-11-20 11:19:00,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656778817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:00,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:00,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:19:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098535793] [2022-11-20 11:19:00,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:19:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:19:00,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:19:00,059 INFO L87 Difference]: Start difference. First operand 9688 states and 48810 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) [2022-11-20 11:19:01,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:01,469 INFO L93 Difference]: Finished difference Result 10137 states and 50894 transitions. [2022-11-20 11:19:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:19:01,471 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 [2022-11-20 11:19:01,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:01,617 INFO L225 Difference]: With dead ends: 10137 [2022-11-20 11:19:01,617 INFO L226 Difference]: Without dead ends: 10137 [2022-11-20 11:19:01,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:19:01,618 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:01,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 61 Unchecked, 0.8s Time] [2022-11-20 11:19:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10137 states. [2022-11-20 11:19:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10137 to 9869. [2022-11-20 11:19:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9869 states, 9864 states have (on average 5.042072181670722) internal successors, (49735), 9868 states have internal predecessors, (49735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9869 states to 9869 states and 49735 transitions. [2022-11-20 11:19:01,831 INFO L78 Accepts]: Start accepts. Automaton has 9869 states and 49735 transitions. Word has length 16 [2022-11-20 11:19:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:01,831 INFO L495 AbstractCegarLoop]: Abstraction has 9869 states and 49735 transitions. [2022-11-20 11:19:01,831 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) [2022-11-20 11:19:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9869 states and 49735 transitions. [2022-11-20 11:19:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:01,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:01,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:01,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Ended with exit code 0 [2022-11-20 11:19:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:02,038 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:19:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1595365308, now seen corresponding path program 15 times [2022-11-20 11:19:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:02,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664099481] [2022-11-20 11:19:02,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:19:02,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:02,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:02,040 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:02,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-20 11:19:02,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:19:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:19:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:02,703 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:02,704 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 17 treesize of output 44 [2022-11-20 11:19:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:03,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:04,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:04,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664099481] [2022-11-20 11:19:04,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664099481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:04,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:04,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:19:04,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26992483] [2022-11-20 11:19:04,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:04,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:19:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:19:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:19:04,076 INFO L87 Difference]: Start difference. First operand 9869 states and 49735 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) [2022-11-20 11:19:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:04,868 INFO L93 Difference]: Finished difference Result 10295 states and 51878 transitions. [2022-11-20 11:19:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:19:04,869 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 [2022-11-20 11:19:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:04,905 INFO L225 Difference]: With dead ends: 10295 [2022-11-20 11:19:04,905 INFO L226 Difference]: Without dead ends: 10295 [2022-11-20 11:19:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:19:04,906 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:04,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-20 11:19:04,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10295 states. [2022-11-20 11:19:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10295 to 10032. [2022-11-20 11:19:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10032 states, 10027 states have (on average 5.046075595891094) internal successors, (50597), 10031 states have internal predecessors, (50597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10032 states to 10032 states and 50597 transitions. [2022-11-20 11:19:05,216 INFO L78 Accepts]: Start accepts. Automaton has 10032 states and 50597 transitions. Word has length 16 [2022-11-20 11:19:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:05,216 INFO L495 AbstractCegarLoop]: Abstraction has 10032 states and 50597 transitions. [2022-11-20 11:19:05,216 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) [2022-11-20 11:19:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10032 states and 50597 transitions. [2022-11-20 11:19:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:05,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:05,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:05,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Ended with exit code 0 [2022-11-20 11:19:05,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:05,422 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:19:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1598046498, now seen corresponding path program 16 times [2022-11-20 11:19:05,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:05,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890986393] [2022-11-20 11:19:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:19:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:05,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:05,424 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2022-11-20 11:19:05,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:19:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:19:05,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:06,016 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:06,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:19:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:07,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890986393] [2022-11-20 11:19:07,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890986393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:07,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:07,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:19:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045102726] [2022-11-20 11:19:07,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:07,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:19:07,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:19:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:19:07,592 INFO L87 Difference]: Start difference. First operand 10032 states and 50597 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) [2022-11-20 11:19:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:09,238 INFO L93 Difference]: Finished difference Result 10614 states and 53265 transitions. [2022-11-20 11:19:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:19:09,240 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 [2022-11-20 11:19:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:09,276 INFO L225 Difference]: With dead ends: 10614 [2022-11-20 11:19:09,276 INFO L226 Difference]: Without dead ends: 10614 [2022-11-20 11:19:09,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:19:09,277 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:09,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 39 Unchecked, 1.0s Time] [2022-11-20 11:19:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2022-11-20 11:19:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 10254. [2022-11-20 11:19:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10254 states, 10249 states have (on average 5.04497999804859) internal successors, (51706), 10253 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10254 states to 10254 states and 51706 transitions. [2022-11-20 11:19:09,613 INFO L78 Accepts]: Start accepts. Automaton has 10254 states and 51706 transitions. Word has length 16 [2022-11-20 11:19:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:09,614 INFO L495 AbstractCegarLoop]: Abstraction has 10254 states and 51706 transitions. [2022-11-20 11:19:09,614 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) [2022-11-20 11:19:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10254 states and 51706 transitions. [2022-11-20 11:19:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:09,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:09,623 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:09,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Ended with exit code 0 [2022-11-20 11:19:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:09,831 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:19:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:09,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1011171120, now seen corresponding path program 13 times [2022-11-20 11:19:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:09,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030306104] [2022-11-20 11:19:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:19:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:09,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:09,832 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:09,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2022-11-20 11:19:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:10,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:19:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:10,422 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:10,422 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 17 treesize of output 44 [2022-11-20 11:19:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:10,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:13,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030306104] [2022-11-20 11:19:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030306104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:13,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:13,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 11:19:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63181433] [2022-11-20 11:19:13,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:19:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:19:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:19:13,122 INFO L87 Difference]: Start difference. First operand 10254 states and 51706 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2022-11-20 11:19:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:29,923 INFO L93 Difference]: Finished difference Result 11680 states and 56260 transitions. [2022-11-20 11:19:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:19:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 11:19:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:29,961 INFO L225 Difference]: With dead ends: 11680 [2022-11-20 11:19:29,961 INFO L226 Difference]: Without dead ends: 11680 [2022-11-20 11:19:29,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:19:29,961 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 806 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 887 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:29,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 453 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1918 Invalid, 0 Unknown, 887 Unchecked, 10.3s Time] [2022-11-20 11:19:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2022-11-20 11:19:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 10161. [2022-11-20 11:19:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10161 states, 10156 states have (on average 5.040764080346593) internal successors, (51194), 10160 states have internal predecessors, (51194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10161 states to 10161 states and 51194 transitions. [2022-11-20 11:19:30,222 INFO L78 Accepts]: Start accepts. Automaton has 10161 states and 51194 transitions. Word has length 16 [2022-11-20 11:19:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:30,222 INFO L495 AbstractCegarLoop]: Abstraction has 10161 states and 51194 transitions. [2022-11-20 11:19:30,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2022-11-20 11:19:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10161 states and 51194 transitions. [2022-11-20 11:19:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:30,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:30,228 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:30,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Ended with exit code 0 [2022-11-20 11:19:30,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:30,429 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:19:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1181398964, now seen corresponding path program 9 times [2022-11-20 11:19:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:30,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67328441] [2022-11-20 11:19:30,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:19:30,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:30,430 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:30,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2022-11-20 11:19:30,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:19:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:19:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:31,113 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:31,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:19:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:31,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:19:32,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:32,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67328441] [2022-11-20 11:19:32,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67328441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:32,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:32,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:19:32,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050379713] [2022-11-20 11:19:32,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:19:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:19:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:19:32,459 INFO L87 Difference]: Start difference. First operand 10161 states and 51194 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) [2022-11-20 11:19:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:33,598 INFO L93 Difference]: Finished difference Result 10331 states and 51897 transitions. [2022-11-20 11:19:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:19:33,600 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 [2022-11-20 11:19:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:33,634 INFO L225 Difference]: With dead ends: 10331 [2022-11-20 11:19:33,634 INFO L226 Difference]: Without dead ends: 10331 [2022-11-20 11:19:33,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:19:33,635 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:33,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 32 Unchecked, 0.6s Time] [2022-11-20 11:19:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2022-11-20 11:19:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10167. [2022-11-20 11:19:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10167 states, 10162 states have (on average 5.04014957685495) internal successors, (51218), 10166 states have internal predecessors, (51218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 51218 transitions. [2022-11-20 11:19:33,979 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 51218 transitions. Word has length 16 [2022-11-20 11:19:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 10167 states and 51218 transitions. [2022-11-20 11:19:33,979 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) [2022-11-20 11:19:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 51218 transitions. [2022-11-20 11:19:33,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:19:33,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:33,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:33,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Ended with exit code 0 [2022-11-20 11:19:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:34,185 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:19:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1439655969, now seen corresponding path program 4 times [2022-11-20 11:19:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:34,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995027522] [2022-11-20 11:19:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:19:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:34,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:34,187 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:34,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09f56945-e3e8-4504-8288-e9f99b6c41e6/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2022-11-20 11:19:34,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:19:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:34,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:19:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:34,772 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:34,772 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 17 treesize of output 44