./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:31:20,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:31:20,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:31:20,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:31:20,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:31:20,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:31:20,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:31:20,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:31:20,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:31:20,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:31:20,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:31:20,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:31:20,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:31:20,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:31:20,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:31:20,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:31:20,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:31:20,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:31:20,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:31:20,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:31:20,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:31:20,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:31:20,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:31:20,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:31:20,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:31:20,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:31:20,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:31:20,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:31:20,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:31:20,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:31:20,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:31:20,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:31:20,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:31:20,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:31:20,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:31:20,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:31:20,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:31:20,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:31:20,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:31:20,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:31:20,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:31:20,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:31:20,778 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:31:20,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:31:20,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:31:20,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:31:20,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:31:20,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:31:20,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:31:20,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:31:20,785 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:31:20,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:31:20,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:31:20,787 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:31:20,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:31:20,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:31:20,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:31:20,788 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:31:20,788 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:31:20,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:31:20,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:31:20,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:31:20,789 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:31:20,789 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:31:20,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:31:20,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:31:20,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:31:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:31:20,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:31:20,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:31:20,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:31:20,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:31:20,792 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_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-11-16 12:31:21,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:31:21,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:31:21,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:31:21,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:31:21,174 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:31:21,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-16 12:31:21,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/868d573de/8f93d1fc64fc43999197da5b89c3cac9/FLAG152e47ff8 [2022-11-16 12:31:21,887 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:31:21,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-16 12:31:21,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/868d573de/8f93d1fc64fc43999197da5b89c3cac9/FLAG152e47ff8 [2022-11-16 12:31:22,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/868d573de/8f93d1fc64fc43999197da5b89c3cac9 [2022-11-16 12:31:22,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:31:22,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:31:22,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:22,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:31:22,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:31:22,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:22" (1/1) ... [2022-11-16 12:31:22,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb931b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:22, skipping insertion in model container [2022-11-16 12:31:22,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:22" (1/1) ... [2022-11-16 12:31:22,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:31:22,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:31:22,550 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-16 12:31:22,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:22,591 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 12:31:22,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@526a824b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:22, skipping insertion in model container [2022-11-16 12:31:22,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:22,594 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:31:22,597 INFO L158 Benchmark]: Toolchain (without parser) took 369.96ms. Allocated memory is still 119.5MB. Free memory was 83.8MB in the beginning and 94.8MB in the end (delta: -11.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:31:22,599 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 119.5MB. Free memory was 90.2MB in the beginning and 90.2MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:31:22,601 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.43ms. Allocated memory is still 119.5MB. Free memory was 83.6MB in the beginning and 95.0MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:31:22,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 119.5MB. Free memory was 90.2MB in the beginning and 90.2MB in the end (delta: 27.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.43ms. Allocated memory is still 119.5MB. Free memory was 83.6MB in the beginning and 95.0MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:31:25,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:31:25,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:31:25,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:31:25,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:31:25,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:31:25,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:31:25,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:31:25,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:31:25,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:31:25,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:31:25,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:31:25,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:31:25,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:31:25,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:31:25,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:31:25,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:31:25,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:31:25,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:31:25,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:31:25,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:31:25,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:31:25,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:31:25,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:31:25,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:31:25,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:31:25,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:31:25,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:31:25,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:31:25,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:31:25,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:31:25,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:31:25,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:31:25,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:31:25,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:31:25,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:31:25,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:31:25,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:31:25,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:31:25,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:31:25,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:31:25,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:31:25,426 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:31:25,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:31:25,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:31:25,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:31:25,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:31:25,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:31:25,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:31:25,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:31:25,432 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:31:25,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:31:25,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:31:25,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:31:25,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:31:25,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:31:25,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:31:25,436 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:31:25,436 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:31:25,437 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:31:25,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:31:25,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:31:25,438 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:31:25,438 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:31:25,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:31:25,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:31:25,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:31:25,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:31:25,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:31:25,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:31:25,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:31:25,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:31:25,441 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:31:25,442 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:31:25,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:31:25,442 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_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d38eb9d6ba70070fe3ced1aec90f1c3400cc1f89786e1bd625a19020cb0869f [2022-11-16 12:31:25,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:31:25,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:31:25,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:31:25,938 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:31:25,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:31:25,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-16 12:31:26,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/6102f3208/dc406a5dda734b8498a1d6b6350c05fe/FLAGfb796037a [2022-11-16 12:31:26,595 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:31:26,596 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2022-11-16 12:31:26,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/6102f3208/dc406a5dda734b8498a1d6b6350c05fe/FLAGfb796037a [2022-11-16 12:31:26,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/data/6102f3208/dc406a5dda734b8498a1d6b6350c05fe [2022-11-16 12:31:26,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:31:26,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:31:26,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:26,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:31:26,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:31:26,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:26" (1/1) ... [2022-11-16 12:31:26,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18496d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:26, skipping insertion in model container [2022-11-16 12:31:26,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:31:26" (1/1) ... [2022-11-16 12:31:26,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:31:26,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:31:27,254 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-16 12:31:27,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:27,284 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:31:27,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:31:27,303 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-16 12:31:27,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:27,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:31:27,338 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2533,2546] [2022-11-16 12:31:27,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:31:27,359 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:31:27,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27 WrapperNode [2022-11-16 12:31:27,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:31:27,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:31:27,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:31:27,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:31:27,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,408 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 218 [2022-11-16 12:31:27,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:31:27,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:31:27,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:31:27,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:31:27,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,468 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:31:27,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:31:27,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:31:27,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:31:27,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (1/1) ... [2022-11-16 12:31:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:31:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:27,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:31:27,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:31:27,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:31:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:31:27,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:31:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:31:27,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:31:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:31:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:31:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:31:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:31:27,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:31:27,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:31:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:31:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:31:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:31:27,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:31:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:31:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:31:27,569 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:31:27,730 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:31:27,733 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:31:28,573 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:31:28,883 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:31:28,883 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:31:28,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:31:28 BoogieIcfgContainer [2022-11-16 12:31:28,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:31:28,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:31:28,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:31:28,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:31:28,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:31:26" (1/3) ... [2022-11-16 12:31:28,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4bb5cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:31:28, skipping insertion in model container [2022-11-16 12:31:28,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:31:27" (2/3) ... [2022-11-16 12:31:28,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4bb5cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:31:28, skipping insertion in model container [2022-11-16 12:31:28,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:31:28" (3/3) ... [2022-11-16 12:31:28,895 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2022-11-16 12:31:28,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:31:28,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-16 12:31:28,914 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:31:29,078 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:31:29,124 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:31:29,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 254 transitions, 532 flow [2022-11-16 12:31:29,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 254 transitions, 532 flow [2022-11-16 12:31:29,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 254 transitions, 532 flow [2022-11-16 12:31:29,297 INFO L130 PetriNetUnfolder]: 18/251 cut-off events. [2022-11-16 12:31:29,300 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:31:29,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 251 events. 18/251 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 482 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 198. Up to 2 conditions per place. [2022-11-16 12:31:29,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 12240 [2022-11-16 12:32:13,527 INFO L134 LiptonReduction]: Checked pairs total: 13983 [2022-11-16 12:32:13,527 INFO L136 LiptonReduction]: Total number of compositions: 284 [2022-11-16 12:32:13,535 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 59 transitions, 142 flow [2022-11-16 12:32:13,668 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2926 states, 2252 states have (on average 4.626554174067495) internal successors, (10419), 2925 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:13,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:32:13,691 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;@d5a9132, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:32:13,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-16 12:32:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 2926 states, 2252 states have (on average 4.626554174067495) internal successors, (10419), 2925 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:32:13,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:13,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:32:13,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:13,713 INFO L85 PathProgramCache]: Analyzing trace with hash 37088, now seen corresponding path program 1 times [2022-11-16 12:32:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:13,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043848312] [2022-11-16 12:32:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:13,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:13,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 12:32:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:13,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:32:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:14,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:14,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:14,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:14,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:14,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043848312] [2022-11-16 12:32:14,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043848312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:14,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:14,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:14,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877463352] [2022-11-16 12:32:14,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:14,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:14,261 INFO L87 Difference]: Start difference. First operand has 2926 states, 2252 states have (on average 4.626554174067495) internal successors, (10419), 2925 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:14,786 INFO L93 Difference]: Finished difference Result 2072 states and 7178 transitions. [2022-11-16 12:32:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:14,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:32:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:14,819 INFO L225 Difference]: With dead ends: 2072 [2022-11-16 12:32:14,820 INFO L226 Difference]: Without dead ends: 2072 [2022-11-16 12:32:14,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:14,823 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:14,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 6 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:32:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-11-16 12:32:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1038. [2022-11-16 12:32:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.972375690607735) internal successors, (3595), 1037 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3595 transitions. [2022-11-16 12:32:14,956 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3595 transitions. Word has length 2 [2022-11-16 12:32:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:14,957 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3595 transitions. [2022-11-16 12:32:14,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3595 transitions. [2022-11-16 12:32:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:32:14,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:14,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:32:14,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:15,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:15,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash 37347, now seen corresponding path program 1 times [2022-11-16 12:32:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225784685] [2022-11-16 12:32:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:15,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:15,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:15,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:15,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 12:32:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:32:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:15,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:15,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225784685] [2022-11-16 12:32:15,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225784685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:15,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:15,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896857010] [2022-11-16 12:32:15,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:15,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:15,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:15,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:15,379 INFO L87 Difference]: Start difference. First operand 1038 states and 3595 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:15,680 INFO L93 Difference]: Finished difference Result 1039 states and 3592 transitions. [2022-11-16 12:32:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:32:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:15,688 INFO L225 Difference]: With dead ends: 1039 [2022-11-16 12:32:15,689 INFO L226 Difference]: Without dead ends: 1039 [2022-11-16 12:32:15,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:15,690 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:15,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:32:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-11-16 12:32:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1038. [2022-11-16 12:32:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.969060773480663) internal successors, (3592), 1037 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3592 transitions. [2022-11-16 12:32:15,726 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3592 transitions. Word has length 2 [2022-11-16 12:32:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:15,726 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3592 transitions. [2022-11-16 12:32:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3592 transitions. [2022-11-16 12:32:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:32:15,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:15,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:32:15,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:15,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash 37087, now seen corresponding path program 1 times [2022-11-16 12:32:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:15,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996581109] [2022-11-16 12:32:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:15,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:15,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:15,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 12:32:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:16,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:32:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:16,145 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:32:16,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:32:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:16,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:16,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:16,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996581109] [2022-11-16 12:32:16,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996581109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:16,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:16,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476796654] [2022-11-16 12:32:16,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:16,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:16,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:16,166 INFO L87 Difference]: Start difference. First operand 1038 states and 3592 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:16,387 INFO L93 Difference]: Finished difference Result 1037 states and 3590 transitions. [2022-11-16 12:32:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:32:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:16,395 INFO L225 Difference]: With dead ends: 1037 [2022-11-16 12:32:16,395 INFO L226 Difference]: Without dead ends: 1037 [2022-11-16 12:32:16,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:16,396 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:16,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-11-16 12:32:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-11-16 12:32:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 3.9668508287292816) internal successors, (3590), 1036 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3590 transitions. [2022-11-16 12:32:16,432 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3590 transitions. Word has length 2 [2022-11-16 12:32:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:16,432 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3590 transitions. [2022-11-16 12:32:16,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3590 transitions. [2022-11-16 12:32:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:32:16,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:16,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:32:16,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:32:16,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:16,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:16,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1156219, now seen corresponding path program 1 times [2022-11-16 12:32:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:16,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968286158] [2022-11-16 12:32:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:16,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:16,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:16,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:16,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 12:32:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:32:16,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:16,876 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:16,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:16,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:17,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968286158] [2022-11-16 12:32:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968286158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:17,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:17,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:32:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865388964] [2022-11-16 12:32:17,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:17,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:32:17,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:32:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:32:17,196 INFO L87 Difference]: Start difference. First operand 1037 states and 3590 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:18,095 INFO L93 Difference]: Finished difference Result 2073 states and 7185 transitions. [2022-11-16 12:32:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:32:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:32:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:18,112 INFO L225 Difference]: With dead ends: 2073 [2022-11-16 12:32:18,112 INFO L226 Difference]: Without dead ends: 2073 [2022-11-16 12:32:18,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:32:18,113 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 213 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:18,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 9 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:32:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-11-16 12:32:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1040. [2022-11-16 12:32:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 908 states have (on average 3.9669603524229076) internal successors, (3602), 1039 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3602 transitions. [2022-11-16 12:32:18,170 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3602 transitions. Word has length 3 [2022-11-16 12:32:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:18,170 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 3602 transitions. [2022-11-16 12:32:18,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3602 transitions. [2022-11-16 12:32:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:32:18,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:18,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:32:18,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:18,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:18,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1156478, now seen corresponding path program 1 times [2022-11-16 12:32:18,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:18,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916342965] [2022-11-16 12:32:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:18,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:18,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:18,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 12:32:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:32:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:18,591 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-16 12:32:18,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-16 12:32:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:18,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:18,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916342965] [2022-11-16 12:32:18,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916342965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:18,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:18,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371521867] [2022-11-16 12:32:18,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:18,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:18,672 INFO L87 Difference]: Start difference. First operand 1040 states and 3602 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:18,866 INFO L93 Difference]: Finished difference Result 1039 states and 3598 transitions. [2022-11-16 12:32:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:18,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:32:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:18,874 INFO L225 Difference]: With dead ends: 1039 [2022-11-16 12:32:18,874 INFO L226 Difference]: Without dead ends: 1039 [2022-11-16 12:32:18,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:18,875 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:18,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 12:32:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-11-16 12:32:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2022-11-16 12:32:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 908 states have (on average 3.962555066079295) internal successors, (3598), 1038 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3598 transitions. [2022-11-16 12:32:18,912 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3598 transitions. Word has length 3 [2022-11-16 12:32:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:18,912 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 3598 transitions. [2022-11-16 12:32:18,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3598 transitions. [2022-11-16 12:32:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:32:18,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:18,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:32:18,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:19,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:19,124 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1156479, now seen corresponding path program 1 times [2022-11-16 12:32:19,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:19,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701021221] [2022-11-16 12:32:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:19,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:19,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:19,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 12:32:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:32:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:19,434 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:32:19,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:32:19,470 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 12:32:19,470 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 44 treesize of output 45 [2022-11-16 12:32:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:19,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:20,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701021221] [2022-11-16 12:32:20,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701021221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:20,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:20,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:32:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795720878] [2022-11-16 12:32:20,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:20,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:32:20,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:20,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:32:20,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:32:20,037 INFO L87 Difference]: Start difference. First operand 1039 states and 3598 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:20,251 INFO L93 Difference]: Finished difference Result 1039 states and 3596 transitions. [2022-11-16 12:32:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:32:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:32:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:20,259 INFO L225 Difference]: With dead ends: 1039 [2022-11-16 12:32:20,260 INFO L226 Difference]: Without dead ends: 1039 [2022-11-16 12:32:20,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:32:20,261 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:20,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 12:32:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-11-16 12:32:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1039. [2022-11-16 12:32:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 908 states have (on average 3.960352422907489) internal successors, (3596), 1038 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3596 transitions. [2022-11-16 12:32:20,296 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3596 transitions. Word has length 3 [2022-11-16 12:32:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:20,296 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 3596 transitions. [2022-11-16 12:32:20,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3596 transitions. [2022-11-16 12:32:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:32:20,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:20,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:32:20,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:20,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:20,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1111401916, now seen corresponding path program 1 times [2022-11-16 12:32:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:20,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972446595] [2022-11-16 12:32:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:20,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:20,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:20,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:20,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 12:32:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:32:20,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:20,729 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-16 12:32:20,729 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 [2022-11-16 12:32:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:20,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:20,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972446595] [2022-11-16 12:32:20,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972446595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:20,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:20,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325634595] [2022-11-16 12:32:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:20,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:20,780 INFO L87 Difference]: Start difference. First operand 1039 states and 3596 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:20,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:20,967 INFO L93 Difference]: Finished difference Result 1003 states and 3494 transitions. [2022-11-16 12:32:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:32:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:20,975 INFO L225 Difference]: With dead ends: 1003 [2022-11-16 12:32:20,975 INFO L226 Difference]: Without dead ends: 1003 [2022-11-16 12:32:20,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:20,976 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:20,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-16 12:32:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-11-16 12:32:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 884 states have (on average 3.9524886877828056) internal successors, (3494), 1002 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3494 transitions. [2022-11-16 12:32:21,007 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3494 transitions. Word has length 5 [2022-11-16 12:32:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:21,008 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 3494 transitions. [2022-11-16 12:32:21,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3494 transitions. [2022-11-16 12:32:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:32:21,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:21,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:32:21,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:21,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1111401917, now seen corresponding path program 1 times [2022-11-16 12:32:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338797746] [2022-11-16 12:32:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:21,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:21,222 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:21,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 12:32:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:32:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:21,468 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:32:21,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:32:21,483 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 14 treesize of output 12 [2022-11-16 12:32:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:21,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:21,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:21,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338797746] [2022-11-16 12:32:21,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338797746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:21,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:21,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:32:21,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319740709] [2022-11-16 12:32:21,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:32:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:32:21,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:21,991 INFO L87 Difference]: Start difference. First operand 1003 states and 3494 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:22,545 INFO L93 Difference]: Finished difference Result 1009 states and 3510 transitions. [2022-11-16 12:32:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:32:22,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:32:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:22,552 INFO L225 Difference]: With dead ends: 1009 [2022-11-16 12:32:22,552 INFO L226 Difference]: Without dead ends: 1009 [2022-11-16 12:32:22,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:22,553 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:22,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-11-16 12:32:22,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-16 12:32:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1006. [2022-11-16 12:32:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 887 states have (on average 3.9481397970687713) internal successors, (3502), 1005 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3502 transitions. [2022-11-16 12:32:22,583 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3502 transitions. Word has length 5 [2022-11-16 12:32:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:22,584 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 3502 transitions. [2022-11-16 12:32:22,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3502 transitions. [2022-11-16 12:32:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:32:22,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:22,584 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-16 12:32:22,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:22,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1111334431, now seen corresponding path program 2 times [2022-11-16 12:32:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:22,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699466043] [2022-11-16 12:32:22,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:22,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:22,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:22,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 12:32:22,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:32:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:22,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:23,040 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-16 12:32:23,041 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 [2022-11-16 12:32:23,061 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 12:32:23,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:32:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:23,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:23,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699466043] [2022-11-16 12:32:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699466043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:23,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:23,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:23,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526664389] [2022-11-16 12:32:23,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:23,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:23,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:23,175 INFO L87 Difference]: Start difference. First operand 1006 states and 3502 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:23,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:23,345 INFO L93 Difference]: Finished difference Result 1005 states and 3500 transitions. [2022-11-16 12:32:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:32:23,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:23,352 INFO L225 Difference]: With dead ends: 1005 [2022-11-16 12:32:23,352 INFO L226 Difference]: Without dead ends: 1005 [2022-11-16 12:32:23,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:23,352 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:23,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:32:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-16 12:32:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2022-11-16 12:32:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 887 states have (on average 3.9458850056369785) internal successors, (3500), 1004 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3500 transitions. [2022-11-16 12:32:23,382 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3500 transitions. Word has length 5 [2022-11-16 12:32:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:23,382 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 3500 transitions. [2022-11-16 12:32:23,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3500 transitions. [2022-11-16 12:32:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:32:23,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:23,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:32:23,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:32:23,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:23,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 93711502, now seen corresponding path program 1 times [2022-11-16 12:32:23,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420408526] [2022-11-16 12:32:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:23,595 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 [2022-11-16 12:32:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:23,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:23,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 12:32:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:32:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:23,783 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:32:23,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:32:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:23,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:23,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420408526] [2022-11-16 12:32:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420408526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:23,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:23,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338024494] [2022-11-16 12:32:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:23,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:32:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:32:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:23,857 INFO L87 Difference]: Start difference. First operand 1005 states and 3500 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:24,151 INFO L93 Difference]: Finished difference Result 604 states and 2063 transitions. [2022-11-16 12:32:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:24,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:32:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:24,157 INFO L225 Difference]: With dead ends: 604 [2022-11-16 12:32:24,157 INFO L226 Difference]: Without dead ends: 604 [2022-11-16 12:32:24,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:32:24,158 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:24,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:32:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-16 12:32:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2022-11-16 12:32:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 561 states have (on average 3.677361853832442) internal successors, (2063), 603 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2063 transitions. [2022-11-16 12:32:24,183 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2063 transitions. Word has length 6 [2022-11-16 12:32:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:24,183 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 2063 transitions. [2022-11-16 12:32:24,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2063 transitions. [2022-11-16 12:32:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:32:24,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:24,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:32:24,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:24,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:24,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 93711503, now seen corresponding path program 1 times [2022-11-16 12:32:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176856971] [2022-11-16 12:32:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:24,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:24,403 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:24,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 12:32:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:32:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:24,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:24,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 12:32:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:24,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:24,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176856971] [2022-11-16 12:32:24,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176856971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:24,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:24,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:32:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065574027] [2022-11-16 12:32:24,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:24,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:32:24,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:24,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:32:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:32:24,841 INFO L87 Difference]: Start difference. First operand 604 states and 2063 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:26,439 INFO L93 Difference]: Finished difference Result 1970 states and 6726 transitions. [2022-11-16 12:32:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:32:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:32:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:26,452 INFO L225 Difference]: With dead ends: 1970 [2022-11-16 12:32:26,452 INFO L226 Difference]: Without dead ends: 1970 [2022-11-16 12:32:26,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:32:26,453 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 437 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:26,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 19 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:32:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-16 12:32:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 707. [2022-11-16 12:32:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 664 states have (on average 3.8117469879518073) internal successors, (2531), 706 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2531 transitions. [2022-11-16 12:32:26,486 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2531 transitions. Word has length 6 [2022-11-16 12:32:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:26,486 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 2531 transitions. [2022-11-16 12:32:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2531 transitions. [2022-11-16 12:32:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:32:26,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:26,487 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:32:26,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:26,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:26,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 91627424, now seen corresponding path program 2 times [2022-11-16 12:32:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991285582] [2022-11-16 12:32:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:26,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:26,700 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 12:32:26,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:32:26,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:32:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:26,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:26,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:27,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991285582] [2022-11-16 12:32:27,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991285582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:27,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:27,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:32:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000921836] [2022-11-16 12:32:27,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:27,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:32:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:32:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:27,772 INFO L87 Difference]: Start difference. First operand 707 states and 2531 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:32,827 INFO L93 Difference]: Finished difference Result 6282 states and 22639 transitions. [2022-11-16 12:32:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:32:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:32:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:32,863 INFO L225 Difference]: With dead ends: 6282 [2022-11-16 12:32:32,863 INFO L226 Difference]: Without dead ends: 6282 [2022-11-16 12:32:32,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:32:32,864 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 910 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:32,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 72 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 12:32:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2022-11-16 12:32:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 713. [2022-11-16 12:32:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 670 states have (on average 3.7955223880597013) internal successors, (2543), 712 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2543 transitions. [2022-11-16 12:32:32,939 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2543 transitions. Word has length 6 [2022-11-16 12:32:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:32,939 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 2543 transitions. [2022-11-16 12:32:32,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2543 transitions. [2022-11-16 12:32:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:32:32,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:32,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:32,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:33,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1389903953, now seen corresponding path program 1 times [2022-11-16 12:32:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:33,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006427008] [2022-11-16 12:32:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:33,169 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 12:32:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:32:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:33,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:33,429 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:32:33,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:32:33,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:32:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:33,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:33,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006427008] [2022-11-16 12:32:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006427008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:33,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:33,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:32:33,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87434056] [2022-11-16 12:32:33,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:32:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:32:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:33,992 INFO L87 Difference]: Start difference. First operand 713 states and 2543 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:34,515 INFO L93 Difference]: Finished difference Result 718 states and 2553 transitions. [2022-11-16 12:32:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:32:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:32:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:34,520 INFO L225 Difference]: With dead ends: 718 [2022-11-16 12:32:34,520 INFO L226 Difference]: Without dead ends: 718 [2022-11-16 12:32:34,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:34,521 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:34,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-16 12:32:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-11-16 12:32:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 714. [2022-11-16 12:32:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 671 states have (on average 3.7928464977645304) internal successors, (2545), 713 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2545 transitions. [2022-11-16 12:32:34,561 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2545 transitions. Word has length 7 [2022-11-16 12:32:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:34,561 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 2545 transitions. [2022-11-16 12:32:34,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2545 transitions. [2022-11-16 12:32:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:32:34,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:34,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:34,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:34,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:34,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1389906867, now seen corresponding path program 1 times [2022-11-16 12:32:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:34,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495725952] [2022-11-16 12:32:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:34,776 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 [2022-11-16 12:32:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:34,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:34,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 12:32:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:32:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:34,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:34,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495725952] [2022-11-16 12:32:34,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495725952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:34,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:34,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:32:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980472808] [2022-11-16 12:32:34,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:32:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:32:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:32:34,960 INFO L87 Difference]: Start difference. First operand 714 states and 2545 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:35,266 INFO L93 Difference]: Finished difference Result 817 states and 2807 transitions. [2022-11-16 12:32:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:32:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:32:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:35,270 INFO L225 Difference]: With dead ends: 817 [2022-11-16 12:32:35,271 INFO L226 Difference]: Without dead ends: 817 [2022-11-16 12:32:35,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:32:35,272 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 7 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:32:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-16 12:32:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 714. [2022-11-16 12:32:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 671 states have (on average 3.6378539493293593) internal successors, (2441), 713 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2441 transitions. [2022-11-16 12:32:35,292 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2441 transitions. Word has length 7 [2022-11-16 12:32:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:35,292 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 2441 transitions. [2022-11-16 12:32:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2441 transitions. [2022-11-16 12:32:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:32:35,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:35,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:35,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-16 12:32:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:35,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1389588741, now seen corresponding path program 1 times [2022-11-16 12:32:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:35,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108949523] [2022-11-16 12:32:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:35,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:35,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 12:32:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:32:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:35,760 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:35,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:36,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:36,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108949523] [2022-11-16 12:32:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108949523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:36,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:36,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:32:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235465364] [2022-11-16 12:32:36,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:32:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:32:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:36,235 INFO L87 Difference]: Start difference. First operand 714 states and 2441 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:36,867 INFO L93 Difference]: Finished difference Result 1446 states and 4952 transitions. [2022-11-16 12:32:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:32:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:32:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:36,873 INFO L225 Difference]: With dead ends: 1446 [2022-11-16 12:32:36,874 INFO L226 Difference]: Without dead ends: 1446 [2022-11-16 12:32:36,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:36,875 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:36,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 18 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2022-11-16 12:32:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-11-16 12:32:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 750. [2022-11-16 12:32:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 709 states have (on average 3.634696755994358) internal successors, (2577), 749 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2577 transitions. [2022-11-16 12:32:36,905 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2577 transitions. Word has length 7 [2022-11-16 12:32:36,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:36,905 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2577 transitions. [2022-11-16 12:32:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2577 transitions. [2022-11-16 12:32:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:32:36,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:36,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:36,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:37,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:37,120 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1389588740, now seen corresponding path program 1 times [2022-11-16 12:32:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:37,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627116633] [2022-11-16 12:32:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:37,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:37,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:37,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 12:32:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:32:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:37,359 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-16 12:32:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-16 12:32:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:37,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:37,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:37,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627116633] [2022-11-16 12:32:37,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627116633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:37,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:37,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534983987] [2022-11-16 12:32:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:37,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:37,403 INFO L87 Difference]: Start difference. First operand 750 states and 2577 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:37,597 INFO L93 Difference]: Finished difference Result 716 states and 2449 transitions. [2022-11-16 12:32:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:32:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:37,600 INFO L225 Difference]: With dead ends: 716 [2022-11-16 12:32:37,600 INFO L226 Difference]: Without dead ends: 716 [2022-11-16 12:32:37,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:37,601 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:37,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-11-16 12:32:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2022-11-16 12:32:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 681 states have (on average 3.5961820851688695) internal successors, (2449), 715 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2449 transitions. [2022-11-16 12:32:37,640 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2449 transitions. Word has length 7 [2022-11-16 12:32:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:37,641 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 2449 transitions. [2022-11-16 12:32:37,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2449 transitions. [2022-11-16 12:32:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:32:37,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:37,642 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 12:32:37,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:37,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:37,853 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1454442915, now seen corresponding path program 2 times [2022-11-16 12:32:37,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:37,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127541395] [2022-11-16 12:32:37,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:37,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:37,856 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:37,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 12:32:37,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:32:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:37,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:38,072 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:32:38,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:32:38,085 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 26 treesize of output 24 [2022-11-16 12:32:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:38,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:38,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:38,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127541395] [2022-11-16 12:32:38,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127541395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:38,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:38,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040336519] [2022-11-16 12:32:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:32:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:32:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:38,311 INFO L87 Difference]: Start difference. First operand 716 states and 2449 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:38,432 INFO L93 Difference]: Finished difference Result 714 states and 2445 transitions. [2022-11-16 12:32:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:32:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:38,434 INFO L225 Difference]: With dead ends: 714 [2022-11-16 12:32:38,434 INFO L226 Difference]: Without dead ends: 714 [2022-11-16 12:32:38,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:38,435 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:38,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-16 12:32:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-16 12:32:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 714. [2022-11-16 12:32:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 679 states have (on average 3.6008836524300443) internal successors, (2445), 713 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2445 transitions. [2022-11-16 12:32:38,454 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2445 transitions. Word has length 7 [2022-11-16 12:32:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:38,454 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 2445 transitions. [2022-11-16 12:32:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2445 transitions. [2022-11-16 12:32:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:32:38,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:38,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:38,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:38,666 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash -137346925, now seen corresponding path program 1 times [2022-11-16 12:32:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304025613] [2022-11-16 12:32:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:38,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:38,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:38,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 12:32:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:32:38,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:38,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:38,928 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:32:38,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:32:38,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:32:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:39,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:39,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:39,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304025613] [2022-11-16 12:32:39,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304025613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:39,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:39,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:32:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982551353] [2022-11-16 12:32:39,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:32:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:32:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:39,431 INFO L87 Difference]: Start difference. First operand 714 states and 2445 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:39,888 INFO L93 Difference]: Finished difference Result 720 states and 2456 transitions. [2022-11-16 12:32:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:32:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:32:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:39,891 INFO L225 Difference]: With dead ends: 720 [2022-11-16 12:32:39,891 INFO L226 Difference]: Without dead ends: 720 [2022-11-16 12:32:39,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:39,891 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:39,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-16 12:32:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-16 12:32:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 713. [2022-11-16 12:32:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 678 states have (on average 3.6002949852507373) internal successors, (2441), 712 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2441 transitions. [2022-11-16 12:32:39,914 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2441 transitions. Word has length 8 [2022-11-16 12:32:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:39,915 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 2441 transitions. [2022-11-16 12:32:39,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2441 transitions. [2022-11-16 12:32:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:32:39,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:39,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:39,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:40,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:40,130 INFO L85 PathProgramCache]: Analyzing trace with hash -137347049, now seen corresponding path program 1 times [2022-11-16 12:32:40,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:40,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904575947] [2022-11-16 12:32:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:40,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:40,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:40,131 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:40,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 12:32:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:32:40,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:40,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:40,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:32:40,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:32:40,500 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 70 treesize of output 68 [2022-11-16 12:32:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-11-16 12:32:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:40,664 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904575947] [2022-11-16 12:32:40,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904575947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:40,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:40,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:32:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060737698] [2022-11-16 12:32:40,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:40,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:32:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:32:40,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:40,666 INFO L87 Difference]: Start difference. First operand 713 states and 2441 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:42,368 INFO L93 Difference]: Finished difference Result 1245 states and 4219 transitions. [2022-11-16 12:32:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:32:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:32:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:42,372 INFO L225 Difference]: With dead ends: 1245 [2022-11-16 12:32:42,372 INFO L226 Difference]: Without dead ends: 1245 [2022-11-16 12:32:42,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:32:42,373 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 166 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:42,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 47 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:32:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-11-16 12:32:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1082. [2022-11-16 12:32:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1047 states have (on average 3.6084049665711557) internal successors, (3778), 1081 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3778 transitions. [2022-11-16 12:32:42,411 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3778 transitions. Word has length 8 [2022-11-16 12:32:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:42,412 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 3778 transitions. [2022-11-16 12:32:42,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3778 transitions. [2022-11-16 12:32:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:32:42,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:42,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:42,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:42,615 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash -127586177, now seen corresponding path program 1 times [2022-11-16 12:32:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368658687] [2022-11-16 12:32:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:42,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:42,617 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:42,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 12:32:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:42,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:32:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:42,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:43,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 12:32:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:43,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:43,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368658687] [2022-11-16 12:32:43,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368658687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:43,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:43,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:32:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050349673] [2022-11-16 12:32:43,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:32:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:32:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:32:43,176 INFO L87 Difference]: Start difference. First operand 1082 states and 3778 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:44,704 INFO L93 Difference]: Finished difference Result 1967 states and 6703 transitions. [2022-11-16 12:32:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:32:44,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:32:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:44,710 INFO L225 Difference]: With dead ends: 1967 [2022-11-16 12:32:44,710 INFO L226 Difference]: Without dead ends: 1967 [2022-11-16 12:32:44,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:32:44,711 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 386 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:44,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 21 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:32:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-16 12:32:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1286. [2022-11-16 12:32:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1251 states have (on average 3.768185451638689) internal successors, (4714), 1285 states have internal predecessors, (4714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4714 transitions. [2022-11-16 12:32:44,751 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4714 transitions. Word has length 8 [2022-11-16 12:32:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:44,751 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 4714 transitions. [2022-11-16 12:32:44,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4714 transitions. [2022-11-16 12:32:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:44,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:44,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:32:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:44,963 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash 37212613, now seen corresponding path program 1 times [2022-11-16 12:32:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:44,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42691531] [2022-11-16 12:32:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:44,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:44,965 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:44,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 12:32:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:32:45,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:45,232 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:32:45,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:32:45,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:32:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:45,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42691531] [2022-11-16 12:32:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42691531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:45,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:45,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:32:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294176546] [2022-11-16 12:32:45,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:32:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:32:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:45,820 INFO L87 Difference]: Start difference. First operand 1286 states and 4714 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:46,288 INFO L93 Difference]: Finished difference Result 1287 states and 4713 transitions. [2022-11-16 12:32:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:32:46,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:32:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:46,292 INFO L225 Difference]: With dead ends: 1287 [2022-11-16 12:32:46,292 INFO L226 Difference]: Without dead ends: 1287 [2022-11-16 12:32:46,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:32:46,293 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:46,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 20 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-16 12:32:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-11-16 12:32:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1286. [2022-11-16 12:32:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1251 states have (on average 3.7665867306155074) internal successors, (4712), 1285 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4712 transitions. [2022-11-16 12:32:46,328 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4712 transitions. Word has length 9 [2022-11-16 12:32:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:46,328 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 4712 transitions. [2022-11-16 12:32:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4712 transitions. [2022-11-16 12:32:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:46,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:46,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:46,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:46,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:46,541 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:46,542 INFO L85 PathProgramCache]: Analyzing trace with hash 340078409, now seen corresponding path program 1 times [2022-11-16 12:32:46,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:46,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886900769] [2022-11-16 12:32:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:46,543 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:46,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 12:32:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:32:46,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:46,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:46,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886900769] [2022-11-16 12:32:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886900769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:46,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696101566] [2022-11-16 12:32:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:46,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:46,700 INFO L87 Difference]: Start difference. First operand 1286 states and 4712 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:46,897 INFO L93 Difference]: Finished difference Result 1046 states and 3712 transitions. [2022-11-16 12:32:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:32:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:46,901 INFO L225 Difference]: With dead ends: 1046 [2022-11-16 12:32:46,901 INFO L226 Difference]: Without dead ends: 1046 [2022-11-16 12:32:46,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:46,902 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:46,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-11-16 12:32:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1046. [2022-11-16 12:32:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1019 states have (on average 3.6427870461236505) internal successors, (3712), 1045 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3712 transitions. [2022-11-16 12:32:46,947 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3712 transitions. Word has length 9 [2022-11-16 12:32:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:46,947 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3712 transitions. [2022-11-16 12:32:46,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3712 transitions. [2022-11-16 12:32:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:46,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:46,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:46,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:47,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:47,160 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:47,160 INFO L85 PathProgramCache]: Analyzing trace with hash 340078410, now seen corresponding path program 1 times [2022-11-16 12:32:47,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419518912] [2022-11-16 12:32:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:47,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:47,162 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:47,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 12:32:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:32:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:32:47,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:47,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419518912] [2022-11-16 12:32:47,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419518912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:47,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:47,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:32:47,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989030399] [2022-11-16 12:32:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:32:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:32:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:47,335 INFO L87 Difference]: Start difference. First operand 1046 states and 3712 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:47,530 INFO L93 Difference]: Finished difference Result 806 states and 2712 transitions. [2022-11-16 12:32:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:32:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:47,533 INFO L225 Difference]: With dead ends: 806 [2022-11-16 12:32:47,533 INFO L226 Difference]: Without dead ends: 806 [2022-11-16 12:32:47,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:32:47,534 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 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 [2022-11-16 12:32:47,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-16 12:32:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2022-11-16 12:32:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 787 states have (on average 3.445997458703939) internal successors, (2712), 805 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2712 transitions. [2022-11-16 12:32:47,555 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2712 transitions. Word has length 9 [2022-11-16 12:32:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:47,555 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 2712 transitions. [2022-11-16 12:32:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2712 transitions. [2022-11-16 12:32:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:47,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:47,556 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:47,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:32:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:47,763 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash 82637682, now seen corresponding path program 2 times [2022-11-16 12:32:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343554380] [2022-11-16 12:32:47,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:47,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:47,765 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:47,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 12:32:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:32:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:32:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:48,064 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:32:48,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 12:32:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:48,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:48,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:32:48,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:32:48,336 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 70 treesize of output 68 [2022-11-16 12:32:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:48,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:48,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343554380] [2022-11-16 12:32:48,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343554380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:48,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:48,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:32:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071634804] [2022-11-16 12:32:48,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:32:48,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:32:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:32:48,973 INFO L87 Difference]: Start difference. First operand 806 states and 2712 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:51,362 INFO L93 Difference]: Finished difference Result 1340 states and 4408 transitions. [2022-11-16 12:32:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:32:51,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:32:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:51,366 INFO L225 Difference]: With dead ends: 1340 [2022-11-16 12:32:51,366 INFO L226 Difference]: Without dead ends: 1340 [2022-11-16 12:32:51,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:32:51,366 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 296 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:51,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 68 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:32:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-11-16 12:32:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 960. [2022-11-16 12:32:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 941 states have (on average 3.520722635494155) internal successors, (3313), 959 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3313 transitions. [2022-11-16 12:32:51,396 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3313 transitions. Word has length 9 [2022-11-16 12:32:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:51,397 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 3313 transitions. [2022-11-16 12:32:51,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3313 transitions. [2022-11-16 12:32:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:51,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:51,398 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:51,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:51,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:51,610 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1855559601, now seen corresponding path program 2 times [2022-11-16 12:32:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776462049] [2022-11-16 12:32:51,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:51,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:51,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:51,613 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:51,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 12:32:51,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:51,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:32:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:51,867 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-16 12:32:51,867 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 [2022-11-16 12:32:51,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:32:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:52,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:52,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776462049] [2022-11-16 12:32:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776462049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:52,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:52,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:32:52,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993789477] [2022-11-16 12:32:52,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:52,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:32:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:52,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:32:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:32:52,064 INFO L87 Difference]: Start difference. First operand 960 states and 3313 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) [2022-11-16 12:32:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:52,509 INFO L93 Difference]: Finished difference Result 930 states and 3224 transitions. [2022-11-16 12:32:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:32:52,510 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 9 [2022-11-16 12:32:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:52,513 INFO L225 Difference]: With dead ends: 930 [2022-11-16 12:32:52,514 INFO L226 Difference]: Without dead ends: 930 [2022-11-16 12:32:52,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:32:52,515 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:52,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 7 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:32:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-16 12:32:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 930. [2022-11-16 12:32:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 917 states have (on average 3.515812431842966) internal successors, (3224), 929 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3224 transitions. [2022-11-16 12:32:52,542 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3224 transitions. Word has length 9 [2022-11-16 12:32:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:52,543 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 3224 transitions. [2022-11-16 12:32:52,543 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) [2022-11-16 12:32:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3224 transitions. [2022-11-16 12:32:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:32:52,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:52,544 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:52,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:52,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:52,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1855244389, now seen corresponding path program 2 times [2022-11-16 12:32:52,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717818319] [2022-11-16 12:32:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:52,758 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:52,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 12:32:52,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:32:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:32:53,007 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 12:32:53,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 12:32:53,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-11-16 12:32:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:32:53,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:32:53,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:53,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717818319] [2022-11-16 12:32:53,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717818319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:32:53,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:32:53,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:32:53,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138354218] [2022-11-16 12:32:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:32:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:32:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:53,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:32:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:53,088 INFO L87 Difference]: Start difference. First operand 930 states and 3224 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:53,259 INFO L93 Difference]: Finished difference Result 882 states and 3066 transitions. [2022-11-16 12:32:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:32:53,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:32:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:53,262 INFO L225 Difference]: With dead ends: 882 [2022-11-16 12:32:53,262 INFO L226 Difference]: Without dead ends: 882 [2022-11-16 12:32:53,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:32:53,263 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:53,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:32:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-16 12:32:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 817. [2022-11-16 12:32:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 808 states have (on average 3.5556930693069306) internal successors, (2873), 816 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2873 transitions. [2022-11-16 12:32:53,307 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2873 transitions. Word has length 9 [2022-11-16 12:32:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:53,307 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 2873 transitions. [2022-11-16 12:32:53,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2873 transitions. [2022-11-16 12:32:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:32:53,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:53,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:53,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:32:53,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:53,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1943951079, now seen corresponding path program 1 times [2022-11-16 12:32:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469667309] [2022-11-16 12:32:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:53,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:53,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:53,520 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:53,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 12:32:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:32:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:53,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:53,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469667309] [2022-11-16 12:32:53,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469667309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:53,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:53,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-16 12:32:53,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248808718] [2022-11-16 12:32:53,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:32:53,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:32:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:32:53,934 INFO L87 Difference]: Start difference. First operand 817 states and 2873 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:54,491 INFO L93 Difference]: Finished difference Result 763 states and 2531 transitions. [2022-11-16 12:32:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:32:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:32:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:54,494 INFO L225 Difference]: With dead ends: 763 [2022-11-16 12:32:54,495 INFO L226 Difference]: Without dead ends: 763 [2022-11-16 12:32:54,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:54,496 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:54,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 13 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-16 12:32:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-11-16 12:32:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 735. [2022-11-16 12:32:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 726 states have (on average 3.4201101928374658) internal successors, (2483), 734 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2483 transitions. [2022-11-16 12:32:54,512 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2483 transitions. Word has length 10 [2022-11-16 12:32:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:54,512 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 2483 transitions. [2022-11-16 12:32:54,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2483 transitions. [2022-11-16 12:32:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:32:54,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:54,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:54,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:54,725 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1952491098, now seen corresponding path program 1 times [2022-11-16 12:32:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:54,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206448758] [2022-11-16 12:32:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:54,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:54,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:54,727 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:54,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 12:32:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:54,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:32:54,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:55,000 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:55,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:55,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:56,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206448758] [2022-11-16 12:32:56,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206448758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:56,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:56,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:32:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804265128] [2022-11-16 12:32:56,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:32:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:32:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:32:56,078 INFO L87 Difference]: Start difference. First operand 735 states and 2483 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:57,041 INFO L93 Difference]: Finished difference Result 784 states and 2678 transitions. [2022-11-16 12:32:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:32:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:32:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:57,043 INFO L225 Difference]: With dead ends: 784 [2022-11-16 12:32:57,043 INFO L226 Difference]: Without dead ends: 784 [2022-11-16 12:32:57,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:57,044 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:57,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 64 Unchecked, 0.5s Time] [2022-11-16 12:32:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-11-16 12:32:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-11-16 12:32:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 775 states have (on average 3.455483870967742) internal successors, (2678), 783 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2678 transitions. [2022-11-16 12:32:57,065 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2678 transitions. Word has length 10 [2022-11-16 12:32:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:57,065 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 2678 transitions. [2022-11-16 12:32:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2678 transitions. [2022-11-16 12:32:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:32:57,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:57,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:57,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-16 12:32:57,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:57,270 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:57,270 INFO L85 PathProgramCache]: Analyzing trace with hash 397862440, now seen corresponding path program 1 times [2022-11-16 12:32:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:57,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304032900] [2022-11-16 12:32:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:32:57,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:57,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:57,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 12:32:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:32:57,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:32:57,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:32:57,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:32:57,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:32:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:57,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:32:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:32:58,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:32:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304032900] [2022-11-16 12:32:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304032900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:32:58,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:32:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:32:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777714467] [2022-11-16 12:32:58,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:32:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:32:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:32:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:32:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:32:58,651 INFO L87 Difference]: Start difference. First operand 784 states and 2678 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:32:59,482 INFO L93 Difference]: Finished difference Result 808 states and 2772 transitions. [2022-11-16 12:32:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:32:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:32:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:32:59,484 INFO L225 Difference]: With dead ends: 808 [2022-11-16 12:32:59,485 INFO L226 Difference]: Without dead ends: 808 [2022-11-16 12:32:59,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:32:59,485 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:32:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 79 Unchecked, 0.6s Time] [2022-11-16 12:32:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-16 12:32:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-11-16 12:32:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 799 states have (on average 3.469336670838548) internal successors, (2772), 807 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2772 transitions. [2022-11-16 12:32:59,506 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2772 transitions. Word has length 11 [2022-11-16 12:32:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:32:59,507 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 2772 transitions. [2022-11-16 12:32:59,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:32:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2772 transitions. [2022-11-16 12:32:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:32:59,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:32:59,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:32:59,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:32:59,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:59,720 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:32:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:32:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 397685740, now seen corresponding path program 2 times [2022-11-16 12:32:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:32:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150677092] [2022-11-16 12:32:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:32:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:32:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:32:59,722 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:32:59,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 12:32:59,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:32:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:32:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:32:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:00,002 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:00,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:33:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:33:00,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:33:00,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150677092] [2022-11-16 12:33:00,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150677092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:33:00,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:33:00,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:33:00,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812836482] [2022-11-16 12:33:00,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:33:00,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:33:00,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:33:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:33:00,255 INFO L87 Difference]: Start difference. First operand 808 states and 2772 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:00,707 INFO L93 Difference]: Finished difference Result 946 states and 3232 transitions. [2022-11-16 12:33:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:33:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:00,711 INFO L225 Difference]: With dead ends: 946 [2022-11-16 12:33:00,711 INFO L226 Difference]: Without dead ends: 946 [2022-11-16 12:33:00,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:33:00,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:00,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:33:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-16 12:33:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 877. [2022-11-16 12:33:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 868 states have (on average 3.4412442396313363) internal successors, (2987), 876 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2987 transitions. [2022-11-16 12:33:00,735 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2987 transitions. Word has length 11 [2022-11-16 12:33:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:00,735 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2987 transitions. [2022-11-16 12:33:00,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2987 transitions. [2022-11-16 12:33:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:00,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:00,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:00,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:00,948 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash 397687414, now seen corresponding path program 1 times [2022-11-16 12:33:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:00,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434018120] [2022-11-16 12:33:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:00,950 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:00,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 12:33:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:33:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:01,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:01,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:01,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434018120] [2022-11-16 12:33:01,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434018120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:01,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:01,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:33:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898314710] [2022-11-16 12:33:01,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:33:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:33:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:33:01,642 INFO L87 Difference]: Start difference. First operand 877 states and 2987 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:02,973 INFO L93 Difference]: Finished difference Result 873 states and 2899 transitions. [2022-11-16 12:33:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:33:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:02,975 INFO L225 Difference]: With dead ends: 873 [2022-11-16 12:33:02,976 INFO L226 Difference]: Without dead ends: 873 [2022-11-16 12:33:02,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:33:02,977 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 124 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:02,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 45 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 81 Unchecked, 1.1s Time] [2022-11-16 12:33:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-16 12:33:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 865. [2022-11-16 12:33:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 856 states have (on average 3.378504672897196) internal successors, (2892), 864 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2892 transitions. [2022-11-16 12:33:02,998 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2892 transitions. Word has length 11 [2022-11-16 12:33:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:02,999 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 2892 transitions. [2022-11-16 12:33:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2892 transitions. [2022-11-16 12:33:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:03,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:03,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:33:03,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:03,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:03,212 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2105612858, now seen corresponding path program 3 times [2022-11-16 12:33:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191682390] [2022-11-16 12:33:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:03,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:03,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:03,216 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:03,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 12:33:03,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:33:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:03,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:33:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:03,601 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:03,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:33:04,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:33:04,114 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 95 treesize of output 91 [2022-11-16 12:33:04,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:04,137 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 103 treesize of output 103 [2022-11-16 12:33:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:04,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:04,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:33:04,355 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 70 treesize of output 68 [2022-11-16 12:33:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:04,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191682390] [2022-11-16 12:33:04,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191682390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:04,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:04,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:33:04,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439384125] [2022-11-16 12:33:04,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:04,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:33:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:33:04,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:33:04,744 INFO L87 Difference]: Start difference. First operand 865 states and 2892 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:05,307 INFO L93 Difference]: Finished difference Result 937 states and 3037 transitions. [2022-11-16 12:33:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:33:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:33:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:05,311 INFO L225 Difference]: With dead ends: 937 [2022-11-16 12:33:05,311 INFO L226 Difference]: Without dead ends: 937 [2022-11-16 12:33:05,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:33:05,311 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:05,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-11-16 12:33:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-11-16 12:33:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 872. [2022-11-16 12:33:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 863 states have (on average 3.3673232908458863) internal successors, (2906), 871 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2906 transitions. [2022-11-16 12:33:05,331 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2906 transitions. Word has length 11 [2022-11-16 12:33:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:05,332 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 2906 transitions. [2022-11-16 12:33:05,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2906 transitions. [2022-11-16 12:33:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:33:05,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:05,333 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:05,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-16 12:33:05,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:05,546 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:05,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:05,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1399087230, now seen corresponding path program 2 times [2022-11-16 12:33:05,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:05,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079540477] [2022-11-16 12:33:05,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:05,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:05,550 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:05,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 12:33:05,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:05,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:33:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:05,918 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:33:05,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 12:33:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:06,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:06,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:33:06,228 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 70 treesize of output 68 [2022-11-16 12:33:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:06,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:06,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079540477] [2022-11-16 12:33:06,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079540477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:06,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:06,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:33:06,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028224654] [2022-11-16 12:33:06,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:06,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:33:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:33:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:33:06,878 INFO L87 Difference]: Start difference. First operand 872 states and 2906 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:08,607 INFO L93 Difference]: Finished difference Result 1434 states and 4701 transitions. [2022-11-16 12:33:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:33:08,608 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 11 [2022-11-16 12:33:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:08,612 INFO L225 Difference]: With dead ends: 1434 [2022-11-16 12:33:08,612 INFO L226 Difference]: Without dead ends: 1434 [2022-11-16 12:33:08,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:33:08,613 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 171 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:08,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 57 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 12:33:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-11-16 12:33:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1084. [2022-11-16 12:33:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1075 states have (on average 3.490232558139535) internal successors, (3752), 1083 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3752 transitions. [2022-11-16 12:33:08,640 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3752 transitions. Word has length 11 [2022-11-16 12:33:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:08,640 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 3752 transitions. [2022-11-16 12:33:08,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3752 transitions. [2022-11-16 12:33:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:33:08,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:08,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:08,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:08,854 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 800318283, now seen corresponding path program 1 times [2022-11-16 12:33:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:08,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676622876] [2022-11-16 12:33:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:33:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:08,856 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-16 12:33:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:33:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:33:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:09,195 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:09,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:33:09,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:33:09,770 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 95 treesize of output 91 [2022-11-16 12:33:09,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:09,793 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 103 treesize of output 103 [2022-11-16 12:33:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:09,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:10,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:10,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:33:10,038 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 70 treesize of output 68 [2022-11-16 12:33:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:10,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:10,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676622876] [2022-11-16 12:33:10,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676622876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:10,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:10,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:33:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794948448] [2022-11-16 12:33:10,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:10,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:33:10,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:33:10,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:33:10,431 INFO L87 Difference]: Start difference. First operand 1084 states and 3752 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) [2022-11-16 12:33:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:12,323 INFO L93 Difference]: Finished difference Result 3111 states and 11004 transitions. [2022-11-16 12:33:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:33:12,325 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 12 [2022-11-16 12:33:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:12,334 INFO L225 Difference]: With dead ends: 3111 [2022-11-16 12:33:12,334 INFO L226 Difference]: Without dead ends: 3111 [2022-11-16 12:33:12,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:33:12,335 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 405 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 845 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:12,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 133 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 845 Unchecked, 1.5s Time] [2022-11-16 12:33:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2022-11-16 12:33:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1763. [2022-11-16 12:33:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1754 states have (on average 3.717787913340935) internal successors, (6521), 1762 states have internal predecessors, (6521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6521 transitions. [2022-11-16 12:33:12,403 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6521 transitions. Word has length 12 [2022-11-16 12:33:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:12,404 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 6521 transitions. [2022-11-16 12:33:12,404 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) [2022-11-16 12:33:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6521 transitions. [2022-11-16 12:33:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:33:12,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:12,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:12,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:33:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:12,621 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 788182631, now seen corresponding path program 2 times [2022-11-16 12:33:12,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968411501] [2022-11-16 12:33:12,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:12,623 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:12,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 12:33:12,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:12,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:33:12,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:12,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:12,974 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 [2022-11-16 12:33:13,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:33:13,461 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 73 treesize of output 69 [2022-11-16 12:33:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:13,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:14,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:33:14,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:33:14,244 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 70 treesize of output 68 [2022-11-16 12:33:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:16,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:16,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968411501] [2022-11-16 12:33:16,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968411501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:16,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:16,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:33:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649386280] [2022-11-16 12:33:16,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:16,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:33:16,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:33:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:33:16,065 INFO L87 Difference]: Start difference. First operand 1763 states and 6521 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:27,086 INFO L93 Difference]: Finished difference Result 3802 states and 13506 transitions. [2022-11-16 12:33:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:33:27,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:33:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:27,097 INFO L225 Difference]: With dead ends: 3802 [2022-11-16 12:33:27,097 INFO L226 Difference]: Without dead ends: 3802 [2022-11-16 12:33:27,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=380, Invalid=810, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:33:27,099 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 647 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:27,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 145 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-16 12:33:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2022-11-16 12:33:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 2055. [2022-11-16 12:33:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2046 states have (on average 3.6608015640273703) internal successors, (7490), 2054 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 7490 transitions. [2022-11-16 12:33:27,155 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 7490 transitions. Word has length 12 [2022-11-16 12:33:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:27,155 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 7490 transitions. [2022-11-16 12:33:27,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 7490 transitions. [2022-11-16 12:33:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:33:27,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:27,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:33:27,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-16 12:33:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:27,363 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -157285061, now seen corresponding path program 2 times [2022-11-16 12:33:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857608885] [2022-11-16 12:33:27,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:33:27,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:27,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:27,364 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:27,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 12:33:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:33:27,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:27,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:33:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:27,752 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:27,752 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 [2022-11-16 12:33:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:30,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857608885] [2022-11-16 12:33:30,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857608885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:30,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:30,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:33:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427288340] [2022-11-16 12:33:30,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:30,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:33:30,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:30,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:33:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:33:30,115 INFO L87 Difference]: Start difference. First operand 2055 states and 7490 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:33:39,776 INFO L93 Difference]: Finished difference Result 4405 states and 16745 transitions. [2022-11-16 12:33:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:33:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:33:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:33:39,787 INFO L225 Difference]: With dead ends: 4405 [2022-11-16 12:33:39,787 INFO L226 Difference]: Without dead ends: 4405 [2022-11-16 12:33:39,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:33:39,788 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 425 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:33:39,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 86 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 544 Invalid, 0 Unknown, 187 Unchecked, 2.6s Time] [2022-11-16 12:33:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4405 states. [2022-11-16 12:33:39,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4405 to 2728. [2022-11-16 12:33:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2719 states have (on average 3.728944464876793) internal successors, (10139), 2727 states have internal predecessors, (10139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 10139 transitions. [2022-11-16 12:33:39,845 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 10139 transitions. Word has length 12 [2022-11-16 12:33:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:33:39,845 INFO L495 AbstractCegarLoop]: Abstraction has 2728 states and 10139 transitions. [2022-11-16 12:33:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:33:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 10139 transitions. [2022-11-16 12:33:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:33:39,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:33:39,847 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 12:33:39,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-16 12:33:40,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:40,050 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:33:40,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:33:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1001349568, now seen corresponding path program 3 times [2022-11-16 12:33:40,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:33:40,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660553326] [2022-11-16 12:33:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:33:40,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:33:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:33:40,054 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:33:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 12:33:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:33:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:33:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:33:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:33:40,447 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:33:40,447 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 [2022-11-16 12:33:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:40,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:33:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:33:44,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:33:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660553326] [2022-11-16 12:33:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660553326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:33:44,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:33:44,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:33:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807679434] [2022-11-16 12:33:44,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:33:44,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:33:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:33:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:33:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:33:44,117 INFO L87 Difference]: Start difference. First operand 2728 states and 10139 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:08,937 INFO L93 Difference]: Finished difference Result 18444 states and 68232 transitions. [2022-11-16 12:34:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:34:08,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:34:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:09,000 INFO L225 Difference]: With dead ends: 18444 [2022-11-16 12:34:09,000 INFO L226 Difference]: Without dead ends: 18444 [2022-11-16 12:34:09,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:34:09,001 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3853 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 2981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:09,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 360 Invalid, 2981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-16 12:34:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18444 states. [2022-11-16 12:34:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18444 to 2740. [2022-11-16 12:34:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2731 states have (on average 3.7213474917612595) internal successors, (10163), 2739 states have internal predecessors, (10163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 10163 transitions. [2022-11-16 12:34:09,395 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 10163 transitions. Word has length 12 [2022-11-16 12:34:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:09,395 INFO L495 AbstractCegarLoop]: Abstraction has 2740 states and 10163 transitions. [2022-11-16 12:34:09,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 10163 transitions. [2022-11-16 12:34:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:34:09,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:09,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:09,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:09,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:09,597 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash -197848790, now seen corresponding path program 3 times [2022-11-16 12:34:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:09,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293584291] [2022-11-16 12:34:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:34:09,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:09,615 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:09,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 12:34:09,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:34:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:09,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:34:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:10,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:10,055 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 [2022-11-16 12:34:10,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:34:10,721 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 83 treesize of output 79 [2022-11-16 12:34:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:10,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:11,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:11,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:11,209 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 70 treesize of output 68 [2022-11-16 12:34:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:12,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293584291] [2022-11-16 12:34:12,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293584291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:12,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:12,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:34:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758879097] [2022-11-16 12:34:12,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:34:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:12,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:34:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:12,312 INFO L87 Difference]: Start difference. First operand 2740 states and 10163 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) [2022-11-16 12:34:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:19,712 INFO L93 Difference]: Finished difference Result 5065 states and 18837 transitions. [2022-11-16 12:34:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:34:19,714 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 13 [2022-11-16 12:34:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:19,725 INFO L225 Difference]: With dead ends: 5065 [2022-11-16 12:34:19,725 INFO L226 Difference]: Without dead ends: 5065 [2022-11-16 12:34:19,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:34:19,725 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 342 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:19,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 86 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 586 Unchecked, 3.1s Time] [2022-11-16 12:34:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2022-11-16 12:34:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 3640. [2022-11-16 12:34:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3631 states have (on average 3.886257229413385) internal successors, (14111), 3639 states have internal predecessors, (14111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 14111 transitions. [2022-11-16 12:34:19,825 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 14111 transitions. Word has length 13 [2022-11-16 12:34:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:19,825 INFO L495 AbstractCegarLoop]: Abstraction has 3640 states and 14111 transitions. [2022-11-16 12:34:19,826 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) [2022-11-16 12:34:19,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 14111 transitions. [2022-11-16 12:34:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:34:19,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:19,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:19,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 12:34:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:20,041 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:20,041 INFO L85 PathProgramCache]: Analyzing trace with hash 975070275, now seen corresponding path program 1 times [2022-11-16 12:34:20,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:20,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540233623] [2022-11-16 12:34:20,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:20,042 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:20,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 12:34:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:20,398 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:20,398 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 [2022-11-16 12:34:20,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:20,862 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 39 treesize of output 43 [2022-11-16 12:34:20,870 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 29 treesize of output 27 [2022-11-16 12:34:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:20,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:20,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:20,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:20,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:34:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:21,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:21,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540233623] [2022-11-16 12:34:21,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540233623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:21,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:21,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:34:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107658536] [2022-11-16 12:34:21,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:21,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:34:21,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:34:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:21,615 INFO L87 Difference]: Start difference. First operand 3640 states and 14111 transitions. Second operand has 16 states, 16 states have (on average 1.625) 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) [2022-11-16 12:34:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:22,713 INFO L93 Difference]: Finished difference Result 3962 states and 14940 transitions. [2022-11-16 12:34:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:34:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) 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 [2022-11-16 12:34:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:22,723 INFO L225 Difference]: With dead ends: 3962 [2022-11-16 12:34:22,723 INFO L226 Difference]: Without dead ends: 3962 [2022-11-16 12:34:22,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:34:22,724 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 152 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:22,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 68 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 268 Unchecked, 0.8s Time] [2022-11-16 12:34:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3962 states. [2022-11-16 12:34:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3962 to 3622. [2022-11-16 12:34:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3613 states have (on average 3.879324660946582) internal successors, (14016), 3621 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 14016 transitions. [2022-11-16 12:34:22,865 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 14016 transitions. Word has length 14 [2022-11-16 12:34:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:22,866 INFO L495 AbstractCegarLoop]: Abstraction has 3622 states and 14016 transitions. [2022-11-16 12:34:22,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) 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) [2022-11-16 12:34:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 14016 transitions. [2022-11-16 12:34:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:34:22,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:22,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:22,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:23,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:23,081 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1798860691, now seen corresponding path program 2 times [2022-11-16 12:34:23,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886555497] [2022-11-16 12:34:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:23,084 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:23,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 12:34:23,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:23,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:34:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:23,463 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:23,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:34:24,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:34:24,184 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 73 treesize of output 69 [2022-11-16 12:34:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:24,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:24,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:24,976 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 70 treesize of output 68 [2022-11-16 12:34:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:26,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886555497] [2022-11-16 12:34:26,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886555497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:26,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:26,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:34:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280566618] [2022-11-16 12:34:26,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:34:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:34:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:34:26,789 INFO L87 Difference]: Start difference. First operand 3622 states and 14016 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:34,028 INFO L93 Difference]: Finished difference Result 5324 states and 20955 transitions. [2022-11-16 12:34:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:34:34,029 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 [2022-11-16 12:34:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:34,042 INFO L225 Difference]: With dead ends: 5324 [2022-11-16 12:34:34,042 INFO L226 Difference]: Without dead ends: 5324 [2022-11-16 12:34:34,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:34:34,043 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 313 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:34,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 83 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 507 Invalid, 0 Unknown, 499 Unchecked, 4.4s Time] [2022-11-16 12:34:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-11-16 12:34:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 4477. [2022-11-16 12:34:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4468 states have (on average 3.972023276633841) internal successors, (17747), 4476 states have internal predecessors, (17747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 17747 transitions. [2022-11-16 12:34:34,142 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 17747 transitions. Word has length 14 [2022-11-16 12:34:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:34,142 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 17747 transitions. [2022-11-16 12:34:34,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 17747 transitions. [2022-11-16 12:34:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:34:34,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:34,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 12:34:34,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:34,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:34,357 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash -188031865, now seen corresponding path program 4 times [2022-11-16 12:34:34,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:34,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000892359] [2022-11-16 12:34:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:34:34,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:34,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:34,359 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:34,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 12:34:34,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:34:34,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:34,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:34,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:34,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:34:36,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 124 [2022-11-16 12:34:36,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:36,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 136 [2022-11-16 12:34:36,241 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 [2022-11-16 12:34:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:36,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:36,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:36,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:36,667 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 70 treesize of output 68 [2022-11-16 12:34:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:37,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000892359] [2022-11-16 12:34:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000892359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:37,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:37,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 12:34:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095980320] [2022-11-16 12:34:37,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:34:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:34:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:34:37,358 INFO L87 Difference]: Start difference. First operand 4477 states and 17747 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:45,812 INFO L93 Difference]: Finished difference Result 7795 states and 29654 transitions. [2022-11-16 12:34:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:34:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:34:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:45,835 INFO L225 Difference]: With dead ends: 7795 [2022-11-16 12:34:45,835 INFO L226 Difference]: Without dead ends: 7795 [2022-11-16 12:34:45,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:34:45,836 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 707 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1443 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:45,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 274 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1084 Invalid, 0 Unknown, 1443 Unchecked, 5.6s Time] [2022-11-16 12:34:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7795 states. [2022-11-16 12:34:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7795 to 5650. [2022-11-16 12:34:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 5641 states have (on average 4.04449565679844) internal successors, (22815), 5649 states have internal predecessors, (22815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 22815 transitions. [2022-11-16 12:34:46,044 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 22815 transitions. Word has length 14 [2022-11-16 12:34:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:46,044 INFO L495 AbstractCegarLoop]: Abstraction has 5650 states and 22815 transitions. [2022-11-16 12:34:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 22815 transitions. [2022-11-16 12:34:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:34:46,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:46,047 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:46,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-16 12:34:46,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:46,256 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1333467846, now seen corresponding path program 3 times [2022-11-16 12:34:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:46,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38142397] [2022-11-16 12:34:46,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:34:46,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:46,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:46,258 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:46,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 12:34:46,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:34:46,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:34:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:46,732 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:46,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:34:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:47,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:34:50,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:50,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38142397] [2022-11-16 12:34:50,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38142397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:50,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:50,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:34:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956922448] [2022-11-16 12:34:50,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:34:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:34:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:34:50,056 INFO L87 Difference]: Start difference. First operand 5650 states and 22815 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:52,258 INFO L93 Difference]: Finished difference Result 6450 states and 25513 transitions. [2022-11-16 12:34:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:34:52,259 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 14 [2022-11-16 12:34:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:52,281 INFO L225 Difference]: With dead ends: 6450 [2022-11-16 12:34:52,281 INFO L226 Difference]: Without dead ends: 6450 [2022-11-16 12:34:52,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:52,282 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 179 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:52,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 24 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 12:34:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6450 states. [2022-11-16 12:34:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6450 to 3917. [2022-11-16 12:34:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3912 states have (on average 3.895961145194274) internal successors, (15241), 3916 states have internal predecessors, (15241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 15241 transitions. [2022-11-16 12:34:52,413 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 15241 transitions. Word has length 14 [2022-11-16 12:34:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:52,413 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 15241 transitions. [2022-11-16 12:34:52,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 15241 transitions. [2022-11-16 12:34:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:34:52,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:52,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:52,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-16 12:34:52,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:52,627 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -465684424, now seen corresponding path program 1 times [2022-11-16 12:34:52,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:52,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702299090] [2022-11-16 12:34:52,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:52,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:52,629 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:52,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 12:34:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:52,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:53,029 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:53,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:34:53,514 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:53,514 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 39 treesize of output 43 [2022-11-16 12:34:53,522 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 29 treesize of output 27 [2022-11-16 12:34:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:53,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:53,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:53,659 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 70 treesize of output 68 [2022-11-16 12:34:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:54,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:54,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702299090] [2022-11-16 12:34:54,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702299090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:54,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:54,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:34:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72210301] [2022-11-16 12:34:54,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:34:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:34:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:54,278 INFO L87 Difference]: Start difference. First operand 3917 states and 15241 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) [2022-11-16 12:34:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:55,677 INFO L93 Difference]: Finished difference Result 4372 states and 16438 transitions. [2022-11-16 12:34:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:34:55,678 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 15 [2022-11-16 12:34:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:55,690 INFO L225 Difference]: With dead ends: 4372 [2022-11-16 12:34:55,690 INFO L226 Difference]: Without dead ends: 4372 [2022-11-16 12:34:55,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:34:55,691 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:55,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 66 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 224 Unchecked, 1.2s Time] [2022-11-16 12:34:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2022-11-16 12:34:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3813. [2022-11-16 12:34:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3808 states have (on average 3.8878676470588234) internal successors, (14805), 3812 states have internal predecessors, (14805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 14805 transitions. [2022-11-16 12:34:55,831 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 14805 transitions. Word has length 15 [2022-11-16 12:34:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:55,831 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 14805 transitions. [2022-11-16 12:34:55,832 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) [2022-11-16 12:34:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 14805 transitions. [2022-11-16 12:34:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:34:55,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:55,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:55,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-16 12:34:56,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:56,036 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 743343790, now seen corresponding path program 1 times [2022-11-16 12:34:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:56,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409914234] [2022-11-16 12:34:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:56,038 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:56,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:56,039 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:56,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 12:34:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:34:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:34:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:56,439 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:34:56,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:34:56,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:56,958 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 39 treesize of output 43 [2022-11-16 12:34:56,966 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 29 treesize of output 27 [2022-11-16 12:34:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:57,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:57,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:34:57,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:34:57,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:34:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:34:57,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:34:57,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409914234] [2022-11-16 12:34:57,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409914234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:34:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261087726] [2022-11-16 12:34:57,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:34:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:34:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:34:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:34:57,770 INFO L87 Difference]: Start difference. First operand 3813 states and 14805 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) [2022-11-16 12:34:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:59,257 INFO L93 Difference]: Finished difference Result 4282 states and 16238 transitions. [2022-11-16 12:34:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:34:59,258 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 15 [2022-11-16 12:34:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:59,270 INFO L225 Difference]: With dead ends: 4282 [2022-11-16 12:34:59,270 INFO L226 Difference]: Without dead ends: 4282 [2022-11-16 12:34:59,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:34:59,271 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 187 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:59,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 62 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 445 Unchecked, 1.3s Time] [2022-11-16 12:34:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2022-11-16 12:34:59,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3961. [2022-11-16 12:34:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3956 states have (on average 3.8875126390293224) internal successors, (15379), 3960 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:34:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 15379 transitions. [2022-11-16 12:34:59,352 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 15379 transitions. Word has length 15 [2022-11-16 12:34:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:59,353 INFO L495 AbstractCegarLoop]: Abstraction has 3961 states and 15379 transitions. [2022-11-16 12:34:59,353 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) [2022-11-16 12:34:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 15379 transitions. [2022-11-16 12:34:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:34:59,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:59,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:59,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 12:34:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:59,579 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:34:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash 511042910, now seen corresponding path program 2 times [2022-11-16 12:34:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:34:59,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468238065] [2022-11-16 12:34:59,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:34:59,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:34:59,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:34:59,581 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:34:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 12:34:59,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:34:59,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:59,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:34:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:00,018 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:35:00,018 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 [2022-11-16 12:35:00,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:35:00,814 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 73 treesize of output 69 [2022-11-16 12:35:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:01,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:01,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:35:01,690 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 70 treesize of output 68 [2022-11-16 12:35:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:03,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:03,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468238065] [2022-11-16 12:35:03,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468238065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:03,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:03,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:35:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85949168] [2022-11-16 12:35:03,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:03,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:35:03,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:35:03,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:35:03,269 INFO L87 Difference]: Start difference. First operand 3961 states and 15379 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:14,155 INFO L93 Difference]: Finished difference Result 7948 states and 30061 transitions. [2022-11-16 12:35:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:35:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:35:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:14,190 INFO L225 Difference]: With dead ends: 7948 [2022-11-16 12:35:14,191 INFO L226 Difference]: Without dead ends: 7948 [2022-11-16 12:35:14,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:35:14,192 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 315 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:14,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 102 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 594 Invalid, 0 Unknown, 506 Unchecked, 5.6s Time] [2022-11-16 12:35:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2022-11-16 12:35:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 5153. [2022-11-16 12:35:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5148 states have (on average 3.9724164724164726) internal successors, (20450), 5152 states have internal predecessors, (20450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 20450 transitions. [2022-11-16 12:35:14,387 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 20450 transitions. Word has length 15 [2022-11-16 12:35:14,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:14,387 INFO L495 AbstractCegarLoop]: Abstraction has 5153 states and 20450 transitions. [2022-11-16 12:35:14,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:14,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 20450 transitions. [2022-11-16 12:35:14,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:35:14,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:14,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:14,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-16 12:35:14,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:14,592 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:35:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1215031194, now seen corresponding path program 3 times [2022-11-16 12:35:14,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979884126] [2022-11-16 12:35:14,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:14,594 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:35:14,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 12:35:14,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:35:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:35:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:15,104 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:35:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:35:15,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:35:15,930 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 83 treesize of output 79 [2022-11-16 12:35:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:16,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:16,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:16,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:35:16,456 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 70 treesize of output 68 [2022-11-16 12:35:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:17,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979884126] [2022-11-16 12:35:17,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979884126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:17,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:17,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:35:17,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492792232] [2022-11-16 12:35:17,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:17,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:35:17,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:35:17,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:35:17,727 INFO L87 Difference]: Start difference. First operand 5153 states and 20450 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) [2022-11-16 12:35:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:24,226 INFO L93 Difference]: Finished difference Result 8174 states and 31924 transitions. [2022-11-16 12:35:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:35:24,228 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 [2022-11-16 12:35:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:24,260 INFO L225 Difference]: With dead ends: 8174 [2022-11-16 12:35:24,263 INFO L226 Difference]: Without dead ends: 8174 [2022-11-16 12:35:24,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:35:24,264 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 322 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:24,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 83 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 431 Unchecked, 2.1s Time] [2022-11-16 12:35:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8174 states. [2022-11-16 12:35:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8174 to 5624. [2022-11-16 12:35:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5624 states, 5619 states have (on average 4.038263036127425) internal successors, (22691), 5623 states have internal predecessors, (22691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5624 states to 5624 states and 22691 transitions. [2022-11-16 12:35:24,413 INFO L78 Accepts]: Start accepts. Automaton has 5624 states and 22691 transitions. Word has length 15 [2022-11-16 12:35:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:24,413 INFO L495 AbstractCegarLoop]: Abstraction has 5624 states and 22691 transitions. [2022-11-16 12:35:24,413 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) [2022-11-16 12:35:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5624 states and 22691 transitions. [2022-11-16 12:35:24,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:35:24,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:24,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:24,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:24,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:24,616 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:35:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:24,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1548944658, now seen corresponding path program 3 times [2022-11-16 12:35:24,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069999394] [2022-11-16 12:35:24,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:24,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:24,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:24,619 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:35:24,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 12:35:24,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:35:24,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:24,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:35:24,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:25,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:35:25,138 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 [2022-11-16 12:35:26,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:35:26,088 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 73 treesize of output 69 [2022-11-16 12:35:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:26,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:27,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:27,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:35:27,167 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 70 treesize of output 68 [2022-11-16 12:35:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:30,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:30,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069999394] [2022-11-16 12:35:30,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069999394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:30,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:30,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:35:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4360712] [2022-11-16 12:35:30,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:30,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:35:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:35:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:35:30,127 INFO L87 Difference]: Start difference. First operand 5624 states and 22691 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:51,905 INFO L93 Difference]: Finished difference Result 11215 states and 43206 transitions. [2022-11-16 12:35:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 12:35:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:35:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:51,938 INFO L225 Difference]: With dead ends: 11215 [2022-11-16 12:35:51,938 INFO L226 Difference]: Without dead ends: 11215 [2022-11-16 12:35:51,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=654, Invalid=1508, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 12:35:51,939 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1350 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:51,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 300 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-16 12:35:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11215 states. [2022-11-16 12:35:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11215 to 7194. [2022-11-16 12:35:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 7189 states have (on average 4.075949367088608) internal successors, (29302), 7193 states have internal predecessors, (29302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 29302 transitions. [2022-11-16 12:35:52,184 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 29302 transitions. Word has length 15 [2022-11-16 12:35:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:52,184 INFO L495 AbstractCegarLoop]: Abstraction has 7194 states and 29302 transitions. [2022-11-16 12:35:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 29302 transitions. [2022-11-16 12:35:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:35:52,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:52,189 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:35:52,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:35:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:52,395 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:35:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash 600705894, now seen corresponding path program 3 times [2022-11-16 12:35:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508097427] [2022-11-16 12:35:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:35:52,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:52,397 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:35:52,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 12:35:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:35:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:35:52,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:52,798 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:35:52,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 12:35:53,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:35:53,119 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 83 treesize of output 79 [2022-11-16 12:35:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:35:53,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:53,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:35:53,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:35:53,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:35:53,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:35:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:35:54,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:35:54,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508097427] [2022-11-16 12:35:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508097427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:35:54,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:35:54,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:35:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064240231] [2022-11-16 12:35:54,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:35:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:35:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:35:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:35:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:35:54,501 INFO L87 Difference]: Start difference. First operand 7194 states and 29302 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:35:58,501 INFO L93 Difference]: Finished difference Result 9932 states and 38699 transitions. [2022-11-16 12:35:58,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:35:58,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:35:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:35:58,535 INFO L225 Difference]: With dead ends: 9932 [2022-11-16 12:35:58,535 INFO L226 Difference]: Without dead ends: 9932 [2022-11-16 12:35:58,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:35:58,536 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 489 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:35:58,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 127 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 12:35:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2022-11-16 12:35:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 4924. [2022-11-16 12:35:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4924 states, 4919 states have (on average 3.9219353527139664) internal successors, (19292), 4923 states have internal predecessors, (19292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4924 states to 4924 states and 19292 transitions. [2022-11-16 12:35:58,762 INFO L78 Accepts]: Start accepts. Automaton has 4924 states and 19292 transitions. Word has length 15 [2022-11-16 12:35:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:35:58,763 INFO L495 AbstractCegarLoop]: Abstraction has 4924 states and 19292 transitions. [2022-11-16 12:35:58,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:35:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 4924 states and 19292 transitions. [2022-11-16 12:35:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:35:58,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:35:58,767 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:35:58,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 12:35:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:58,971 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:35:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:35:58,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1082121350, now seen corresponding path program 5 times [2022-11-16 12:35:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:35:58,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221781509] [2022-11-16 12:35:58,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:35:58,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:35:58,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:35:58,973 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:35:58,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 12:35:59,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:35:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:35:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:35:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:35:59,431 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:35:59,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:36:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:36:00,244 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 83 treesize of output 79 [2022-11-16 12:36:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:00,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:00,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:00,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:36:00,907 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 70 treesize of output 68 [2022-11-16 12:36:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:02,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221781509] [2022-11-16 12:36:02,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221781509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:02,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:02,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:36:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272376252] [2022-11-16 12:36:02,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:36:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:36:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:36:02,953 INFO L87 Difference]: Start difference. First operand 4924 states and 19292 transitions. Second operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:09,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:18,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:36:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:39,690 INFO L93 Difference]: Finished difference Result 12204 states and 45378 transitions. [2022-11-16 12:36:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:36:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:36:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:39,726 INFO L225 Difference]: With dead ends: 12204 [2022-11-16 12:36:39,726 INFO L226 Difference]: Without dead ends: 12204 [2022-11-16 12:36:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=771, Invalid=2889, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 12:36:39,727 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1855 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 775 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:39,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 501 Invalid, 3830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3012 Invalid, 0 Unknown, 775 Unchecked, 18.8s Time] [2022-11-16 12:36:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12204 states. [2022-11-16 12:36:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12204 to 5129. [2022-11-16 12:36:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5124 states have (on average 3.911007025761124) internal successors, (20040), 5128 states have internal predecessors, (20040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 20040 transitions. [2022-11-16 12:36:39,911 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 20040 transitions. Word has length 15 [2022-11-16 12:36:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:39,912 INFO L495 AbstractCegarLoop]: Abstraction has 5129 states and 20040 transitions. [2022-11-16 12:36:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 20040 transitions. [2022-11-16 12:36:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:36:39,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:39,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:39,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-16 12:36:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:40,119 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:36:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:40,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1066247436, now seen corresponding path program 1 times [2022-11-16 12:36:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:40,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61982091] [2022-11-16 12:36:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:40,121 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:36:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 12:36:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:36:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:40,522 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:36:40,522 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 [2022-11-16 12:36:41,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:41,001 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 39 treesize of output 43 [2022-11-16 12:36:41,010 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 29 treesize of output 27 [2022-11-16 12:36:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:41,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:41,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:41,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:36:41,210 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 70 treesize of output 68 [2022-11-16 12:36:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:41,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:41,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61982091] [2022-11-16 12:36:41,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61982091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:41,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:41,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:36:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7762603] [2022-11-16 12:36:41,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:36:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:36:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:36:41,759 INFO L87 Difference]: Start difference. First operand 5129 states and 20040 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:43,252 INFO L93 Difference]: Finished difference Result 5649 states and 21475 transitions. [2022-11-16 12:36:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:36:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:36:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:43,266 INFO L225 Difference]: With dead ends: 5649 [2022-11-16 12:36:43,266 INFO L226 Difference]: Without dead ends: 5649 [2022-11-16 12:36:43,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:36:43,266 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 206 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:43,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 58 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 271 Invalid, 0 Unknown, 350 Unchecked, 1.2s Time] [2022-11-16 12:36:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5649 states. [2022-11-16 12:36:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5649 to 5124. [2022-11-16 12:36:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5119 states have (on average 3.9118968548544637) internal successors, (20025), 5123 states have internal predecessors, (20025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 20025 transitions. [2022-11-16 12:36:43,410 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 20025 transitions. Word has length 16 [2022-11-16 12:36:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:43,410 INFO L495 AbstractCegarLoop]: Abstraction has 5124 states and 20025 transitions. [2022-11-16 12:36:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 20025 transitions. [2022-11-16 12:36:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:36:43,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:43,412 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:43,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:43,613 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:36:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1262100213, now seen corresponding path program 1 times [2022-11-16 12:36:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520877164] [2022-11-16 12:36:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:43,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:43,615 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:36:43,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 12:36:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:36:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:44,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:36:44,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:36:44,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:44,529 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 39 treesize of output 43 [2022-11-16 12:36:44,537 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 29 treesize of output 27 [2022-11-16 12:36:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:44,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:44,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:44,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:36:44,667 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 70 treesize of output 68 [2022-11-16 12:36:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:45,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520877164] [2022-11-16 12:36:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520877164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:45,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:45,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:36:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878317119] [2022-11-16 12:36:45,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:45,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:36:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:45,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:36:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:36:45,270 INFO L87 Difference]: Start difference. First operand 5124 states and 20025 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:46,552 INFO L93 Difference]: Finished difference Result 5522 states and 21147 transitions. [2022-11-16 12:36:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:36:46,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:36:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:46,568 INFO L225 Difference]: With dead ends: 5522 [2022-11-16 12:36:46,568 INFO L226 Difference]: Without dead ends: 5522 [2022-11-16 12:36:46,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:36:46,569 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 180 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:46,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 57 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 0 Unknown, 363 Unchecked, 1.1s Time] [2022-11-16 12:36:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2022-11-16 12:36:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5126. [2022-11-16 12:36:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5126 states, 5121 states have (on average 3.9117359890646357) internal successors, (20032), 5125 states have internal predecessors, (20032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 20032 transitions. [2022-11-16 12:36:46,719 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 20032 transitions. Word has length 16 [2022-11-16 12:36:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:46,719 INFO L495 AbstractCegarLoop]: Abstraction has 5126 states and 20032 transitions. [2022-11-16 12:36:46,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 20032 transitions. [2022-11-16 12:36:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:36:46,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:46,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:46,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:46,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:46,933 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:36:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:46,933 INFO L85 PathProgramCache]: Analyzing trace with hash 2085890629, now seen corresponding path program 2 times [2022-11-16 12:36:46,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:46,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737654642] [2022-11-16 12:36:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:36:46,934 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 [2022-11-16 12:36:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:46,935 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:36:46,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 12:36:47,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:36:47,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:36:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:36:47,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:47,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:36:47,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:36:48,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:36:48,119 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 73 treesize of output 69 [2022-11-16 12:36:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:48,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:48,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:48,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:36:48,851 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 70 treesize of output 68 [2022-11-16 12:36:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:50,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:36:50,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737654642] [2022-11-16 12:36:50,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737654642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:36:50,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:36:50,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:36:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656699984] [2022-11-16 12:36:50,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:36:50,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:36:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:36:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:36:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:36:50,207 INFO L87 Difference]: Start difference. First operand 5126 states and 20032 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:36:58,052 INFO L93 Difference]: Finished difference Result 7753 states and 29362 transitions. [2022-11-16 12:36:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:36:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:36:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:36:58,073 INFO L225 Difference]: With dead ends: 7753 [2022-11-16 12:36:58,073 INFO L226 Difference]: Without dead ends: 7753 [2022-11-16 12:36:58,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:36:58,074 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 369 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:36:58,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 91 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 603 Invalid, 0 Unknown, 621 Unchecked, 4.7s Time] [2022-11-16 12:36:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2022-11-16 12:36:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 5218. [2022-11-16 12:36:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 5213 states have (on average 3.907922501438711) internal successors, (20372), 5217 states have internal predecessors, (20372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 20372 transitions. [2022-11-16 12:36:58,243 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 20372 transitions. Word has length 16 [2022-11-16 12:36:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:36:58,243 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 20372 transitions. [2022-11-16 12:36:58,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:36:58,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 20372 transitions. [2022-11-16 12:36:58,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:36:58,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:36:58,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:36:58,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:36:58,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:58,451 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:36:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:36:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1282874974, now seen corresponding path program 1 times [2022-11-16 12:36:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:36:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804750332] [2022-11-16 12:36:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:36:58,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:36:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:36:58,453 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:36:58,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 12:36:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:36:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:36:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:36:58,834 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:36:58,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:36:59,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:59,323 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 39 treesize of output 43 [2022-11-16 12:36:59,330 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 29 treesize of output 27 [2022-11-16 12:36:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:36:59,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:36:59,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:36:59,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:36:59,433 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 70 treesize of output 68 [2022-11-16 12:37:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:00,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:00,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804750332] [2022-11-16 12:37:00,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804750332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:00,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:00,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:37:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991567081] [2022-11-16 12:37:00,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:00,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:37:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:00,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:37:00,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:37:00,012 INFO L87 Difference]: Start difference. First operand 5218 states and 20372 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:01,493 INFO L93 Difference]: Finished difference Result 5432 states and 20412 transitions. [2022-11-16 12:37:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:37:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:37:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:01,505 INFO L225 Difference]: With dead ends: 5432 [2022-11-16 12:37:01,505 INFO L226 Difference]: Without dead ends: 5432 [2022-11-16 12:37:01,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:37:01,506 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 202 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:01,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 70 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 291 Unchecked, 1.3s Time] [2022-11-16 12:37:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5432 states. [2022-11-16 12:37:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5432 to 4725. [2022-11-16 12:37:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 4720 states have (on average 3.860805084745763) internal successors, (18223), 4724 states have internal predecessors, (18223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 18223 transitions. [2022-11-16 12:37:01,630 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 18223 transitions. Word has length 16 [2022-11-16 12:37:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:01,630 INFO L495 AbstractCegarLoop]: Abstraction has 4725 states and 18223 transitions. [2022-11-16 12:37:01,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 18223 transitions. [2022-11-16 12:37:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:01,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:01,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:01,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:01,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:01,835 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2124674784, now seen corresponding path program 2 times [2022-11-16 12:37:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:01,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960902539] [2022-11-16 12:37:01,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:01,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:01,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:01,836 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:01,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 12:37:02,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:02,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:02,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:37:02,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:02,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:02,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:03,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:37:03,020 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 73 treesize of output 69 [2022-11-16 12:37:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:03,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:03,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:03,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:03,780 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 70 treesize of output 68 [2022-11-16 12:37:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:05,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960902539] [2022-11-16 12:37:05,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960902539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:05,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:05,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:37:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51089471] [2022-11-16 12:37:05,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:05,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:37:05,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:37:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:37:05,127 INFO L87 Difference]: Start difference. First operand 4725 states and 18223 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:12,271 INFO L93 Difference]: Finished difference Result 6442 states and 24685 transitions. [2022-11-16 12:37:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:37:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:37:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:12,292 INFO L225 Difference]: With dead ends: 6442 [2022-11-16 12:37:12,292 INFO L226 Difference]: Without dead ends: 6442 [2022-11-16 12:37:12,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:37:12,293 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 268 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:12,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 90 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 0 Unknown, 503 Unchecked, 4.0s Time] [2022-11-16 12:37:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2022-11-16 12:37:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 4968. [2022-11-16 12:37:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4968 states, 4963 states have (on average 3.855732419907314) internal successors, (19136), 4967 states have internal predecessors, (19136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4968 states to 4968 states and 19136 transitions. [2022-11-16 12:37:12,462 INFO L78 Accepts]: Start accepts. Automaton has 4968 states and 19136 transitions. Word has length 16 [2022-11-16 12:37:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 4968 states and 19136 transitions. [2022-11-16 12:37:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4968 states and 19136 transitions. [2022-11-16 12:37:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:12,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:12,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:12,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:12,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:12,679 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1025721118, now seen corresponding path program 1 times [2022-11-16 12:37:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:12,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571520126] [2022-11-16 12:37:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:12,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:12,681 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-16 12:37:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:37:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:13,100 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:13,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:13,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:13,629 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 39 treesize of output 43 [2022-11-16 12:37:13,638 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 29 treesize of output 27 [2022-11-16 12:37:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:13,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:13,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:13,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:13,756 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 70 treesize of output 68 [2022-11-16 12:37:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:14,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:14,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571520126] [2022-11-16 12:37:14,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571520126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:14,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:14,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:37:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831732841] [2022-11-16 12:37:14,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:14,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:37:14,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:37:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:37:14,337 INFO L87 Difference]: Start difference. First operand 4968 states and 19136 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:16,057 INFO L93 Difference]: Finished difference Result 5607 states and 21140 transitions. [2022-11-16 12:37:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:37:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:37:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:16,071 INFO L225 Difference]: With dead ends: 5607 [2022-11-16 12:37:16,071 INFO L226 Difference]: Without dead ends: 5607 [2022-11-16 12:37:16,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:37:16,072 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:16,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 72 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 353 Unchecked, 1.4s Time] [2022-11-16 12:37:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2022-11-16 12:37:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 5010. [2022-11-16 12:37:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 5005 states have (on average 3.861138861138861) internal successors, (19325), 5009 states have internal predecessors, (19325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 19325 transitions. [2022-11-16 12:37:16,203 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 19325 transitions. Word has length 16 [2022-11-16 12:37:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:16,203 INFO L495 AbstractCegarLoop]: Abstraction has 5010 states and 19325 transitions. [2022-11-16 12:37:16,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 19325 transitions. [2022-11-16 12:37:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:16,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:16,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:16,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-16 12:37:16,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:16,418 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 160900128, now seen corresponding path program 2 times [2022-11-16 12:37:16,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:16,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134996037] [2022-11-16 12:37:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:37:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:16,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:16,421 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:16,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 12:37:16,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:37:16,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:37:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:16,874 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:16,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:17,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:37:17,652 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 73 treesize of output 69 [2022-11-16 12:37:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:17,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:18,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:18,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:18,521 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 70 treesize of output 68 [2022-11-16 12:37:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:19,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134996037] [2022-11-16 12:37:19,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134996037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:19,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:19,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:37:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161238043] [2022-11-16 12:37:19,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:37:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:37:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:37:19,927 INFO L87 Difference]: Start difference. First operand 5010 states and 19325 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:28,871 INFO L93 Difference]: Finished difference Result 7318 states and 27403 transitions. [2022-11-16 12:37:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:37:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:37:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:28,896 INFO L225 Difference]: With dead ends: 7318 [2022-11-16 12:37:28,896 INFO L226 Difference]: Without dead ends: 7318 [2022-11-16 12:37:28,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:37:28,897 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 309 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1096 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:28,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 88 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 517 Invalid, 0 Unknown, 1096 Unchecked, 5.1s Time] [2022-11-16 12:37:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2022-11-16 12:37:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5170. [2022-11-16 12:37:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5170 states, 5165 states have (on average 3.8693126815101646) internal successors, (19985), 5169 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 19985 transitions. [2022-11-16 12:37:29,043 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 19985 transitions. Word has length 16 [2022-11-16 12:37:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:29,044 INFO L495 AbstractCegarLoop]: Abstraction has 5170 states and 19985 transitions. [2022-11-16 12:37:29,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 19985 transitions. [2022-11-16 12:37:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:29,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:29,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:29,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-16 12:37:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:29,255 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1443338519, now seen corresponding path program 4 times [2022-11-16 12:37:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631343298] [2022-11-16 12:37:29,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:37:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:29,257 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:29,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 12:37:29,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:37:29,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:29,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:37:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:29,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:29,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:30,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:37:30,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2022-11-16 12:37:30,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:30,688 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 98 treesize of output 100 [2022-11-16 12:37:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:30,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:31,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:31,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:31,032 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 70 treesize of output 68 [2022-11-16 12:37:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:32,117 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631343298] [2022-11-16 12:37:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631343298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:32,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:32,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:37:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805068194] [2022-11-16 12:37:32,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:37:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:37:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:37:32,119 INFO L87 Difference]: Start difference. First operand 5170 states and 19985 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:35,670 INFO L93 Difference]: Finished difference Result 6371 states and 23942 transitions. [2022-11-16 12:37:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:37:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 16 [2022-11-16 12:37:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:35,691 INFO L225 Difference]: With dead ends: 6371 [2022-11-16 12:37:35,691 INFO L226 Difference]: Without dead ends: 6371 [2022-11-16 12:37:35,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:37:35,692 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 372 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 930 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:35,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 202 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 530 Invalid, 0 Unknown, 930 Unchecked, 2.4s Time] [2022-11-16 12:37:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2022-11-16 12:37:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 5278. [2022-11-16 12:37:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5273 states have (on average 3.872747961312346) internal successors, (20421), 5277 states have internal predecessors, (20421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 20421 transitions. [2022-11-16 12:37:35,832 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 20421 transitions. Word has length 16 [2022-11-16 12:37:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:35,832 INFO L495 AbstractCegarLoop]: Abstraction has 5278 states and 20421 transitions. [2022-11-16 12:37:35,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 20421 transitions. [2022-11-16 12:37:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:35,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:35,837 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:35,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-16 12:37:36,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:36,038 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash 764805643, now seen corresponding path program 4 times [2022-11-16 12:37:36,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964590403] [2022-11-16 12:37:36,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:37:36,039 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 [2022-11-16 12:37:36,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:36,040 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:36,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 12:37:36,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:37:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:37:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:36,480 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:36,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:37,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:37:37,303 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 83 treesize of output 79 [2022-11-16 12:37:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:37,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:37,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:37,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:37,770 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 70 treesize of output 68 [2022-11-16 12:37:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:39,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964590403] [2022-11-16 12:37:39,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964590403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:39,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:39,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:37:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096694165] [2022-11-16 12:37:39,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:39,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:37:39,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:39,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:37:39,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:37:39,739 INFO L87 Difference]: Start difference. First operand 5278 states and 20421 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:37:52,130 INFO L93 Difference]: Finished difference Result 9537 states and 36344 transitions. [2022-11-16 12:37:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:37:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:37:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:37:52,159 INFO L225 Difference]: With dead ends: 9537 [2022-11-16 12:37:52,159 INFO L226 Difference]: Without dead ends: 9537 [2022-11-16 12:37:52,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:37:52,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 775 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:37:52,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 189 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1254 Invalid, 0 Unknown, 225 Unchecked, 4.4s Time] [2022-11-16 12:37:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2022-11-16 12:37:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 5283. [2022-11-16 12:37:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5283 states, 5278 states have (on average 3.8713527851458887) internal successors, (20433), 5282 states have internal predecessors, (20433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5283 states to 5283 states and 20433 transitions. [2022-11-16 12:37:52,342 INFO L78 Accepts]: Start accepts. Automaton has 5283 states and 20433 transitions. Word has length 16 [2022-11-16 12:37:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:37:52,343 INFO L495 AbstractCegarLoop]: Abstraction has 5283 states and 20433 transitions. [2022-11-16 12:37:52,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5283 states and 20433 transitions. [2022-11-16 12:37:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:37:52,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:37:52,347 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:52,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:52,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:52,560 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:37:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash 813931963, now seen corresponding path program 5 times [2022-11-16 12:37:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:37:52,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122508944] [2022-11-16 12:37:52,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:37:52,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:37:52,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:37:52,563 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:37:52,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 12:37:52,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:37:52,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:37:52,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:37:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:53,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:37:53,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:37:53,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:37:53,994 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 83 treesize of output 79 [2022-11-16 12:37:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:54,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:54,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:54,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:54,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:37:54,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:37:54,572 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 70 treesize of output 68 [2022-11-16 12:37:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:56,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:37:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122508944] [2022-11-16 12:37:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122508944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:56,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:37:56,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:37:56,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189051350] [2022-11-16 12:37:56,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:56,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:37:56,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:37:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:37:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:37:56,476 INFO L87 Difference]: Start difference. First operand 5283 states and 20433 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:03,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:12,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:38:28,858 INFO L93 Difference]: Finished difference Result 12884 states and 48630 transitions. [2022-11-16 12:38:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:38:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:38:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:38:28,895 INFO L225 Difference]: With dead ends: 12884 [2022-11-16 12:38:28,895 INFO L226 Difference]: Without dead ends: 12884 [2022-11-16 12:38:28,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=719, Invalid=3063, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:38:28,896 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1164 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 3366 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 4472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1062 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:38:28,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 582 Invalid, 4472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3366 Invalid, 0 Unknown, 1062 Unchecked, 20.7s Time] [2022-11-16 12:38:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12884 states. [2022-11-16 12:38:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12884 to 5280. [2022-11-16 12:38:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5280 states, 5275 states have (on average 3.8720379146919433) internal successors, (20425), 5279 states have internal predecessors, (20425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 20425 transitions. [2022-11-16 12:38:29,051 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 20425 transitions. Word has length 16 [2022-11-16 12:38:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:38:29,051 INFO L495 AbstractCegarLoop]: Abstraction has 5280 states and 20425 transitions. [2022-11-16 12:38:29,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 20425 transitions. [2022-11-16 12:38:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:38:29,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:38:29,054 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:38:29,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:38:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:38:29,255 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:38:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:38:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash 752669991, now seen corresponding path program 6 times [2022-11-16 12:38:29,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:38:29,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605164031] [2022-11-16 12:38:29,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:38:29,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:38:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:38:29,257 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:38:29,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 12:38:29,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:38:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:38:29,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:38:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:38:29,718 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:38:29,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:38:30,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:38:30,535 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 83 treesize of output 79 [2022-11-16 12:38:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:30,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:38:31,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:38:31,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:38:31,030 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 70 treesize of output 68 [2022-11-16 12:38:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:38:33,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:38:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605164031] [2022-11-16 12:38:33,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605164031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:38:33,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:38:33,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:38:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975418101] [2022-11-16 12:38:33,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:38:33,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:38:33,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:38:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:38:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:38:33,011 INFO L87 Difference]: Start difference. First operand 5280 states and 20425 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:38:44,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:05,493 INFO L93 Difference]: Finished difference Result 12755 states and 47390 transitions. [2022-11-16 12:39:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:39:05,495 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:39:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:05,535 INFO L225 Difference]: With dead ends: 12755 [2022-11-16 12:39:05,536 INFO L226 Difference]: Without dead ends: 12755 [2022-11-16 12:39:05,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=753, Invalid=2787, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:39:05,536 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1682 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 3177 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:05,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 502 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3177 Invalid, 0 Unknown, 716 Unchecked, 19.1s Time] [2022-11-16 12:39:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12755 states. [2022-11-16 12:39:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12755 to 5279. [2022-11-16 12:39:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5279 states, 5274 states have (on average 3.872013651877133) internal successors, (20421), 5278 states have internal predecessors, (20421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5279 states to 5279 states and 20421 transitions. [2022-11-16 12:39:05,759 INFO L78 Accepts]: Start accepts. Automaton has 5279 states and 20421 transitions. Word has length 16 [2022-11-16 12:39:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:05,759 INFO L495 AbstractCegarLoop]: Abstraction has 5279 states and 20421 transitions. [2022-11-16 12:39:05,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5279 states and 20421 transitions. [2022-11-16 12:39:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:05,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:05,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:05,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 12:39:05,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:05,964 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:05,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2061665074, now seen corresponding path program 1 times [2022-11-16 12:39:05,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708242023] [2022-11-16 12:39:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:05,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:05,966 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:05,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 12:39:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:39:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:06,436 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:06,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:06,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:06,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2022-11-16 12:39:06,777 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 29 treesize of output 27 [2022-11-16 12:39:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:39:06,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:06,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:06,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:06,892 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 70 treesize of output 68 [2022-11-16 12:39:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:39:07,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708242023] [2022-11-16 12:39:07,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708242023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:07,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:07,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 12:39:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53357481] [2022-11-16 12:39:07,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:39:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:39:07,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:39:07,339 INFO L87 Difference]: Start difference. First operand 5279 states and 20421 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:09,517 INFO L93 Difference]: Finished difference Result 6095 states and 23061 transitions. [2022-11-16 12:39:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:39:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:09,532 INFO L225 Difference]: With dead ends: 6095 [2022-11-16 12:39:09,532 INFO L226 Difference]: Without dead ends: 6095 [2022-11-16 12:39:09,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:39:09,533 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:09,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 66 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 105 Unchecked, 1.7s Time] [2022-11-16 12:39:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2022-11-16 12:39:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 5357. [2022-11-16 12:39:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 5352 states have (on average 3.8628550074738417) internal successors, (20674), 5356 states have internal predecessors, (20674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 20674 transitions. [2022-11-16 12:39:09,671 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 20674 transitions. Word has length 17 [2022-11-16 12:39:09,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:09,671 INFO L495 AbstractCegarLoop]: Abstraction has 5357 states and 20674 transitions. [2022-11-16 12:39:09,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 20674 transitions. [2022-11-16 12:39:09,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:09,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:09,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:09,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-16 12:39:09,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:09,875 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:09,876 INFO L85 PathProgramCache]: Analyzing trace with hash -175483975, now seen corresponding path program 1 times [2022-11-16 12:39:09,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861107381] [2022-11-16 12:39:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:09,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:09,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:09,877 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:09,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 12:39:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:39:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:10,373 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:10,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:10,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:10,951 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 39 treesize of output 43 [2022-11-16 12:39:10,959 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 29 treesize of output 27 [2022-11-16 12:39:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:11,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:11,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:11,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:11,070 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 70 treesize of output 68 [2022-11-16 12:39:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:11,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:11,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861107381] [2022-11-16 12:39:11,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861107381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:11,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:11,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:39:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747749895] [2022-11-16 12:39:11,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:39:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:39:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:11,719 INFO L87 Difference]: Start difference. First operand 5357 states and 20674 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:13,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:13,483 INFO L93 Difference]: Finished difference Result 5944 states and 22304 transitions. [2022-11-16 12:39:13,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:39:13,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:13,498 INFO L225 Difference]: With dead ends: 5944 [2022-11-16 12:39:13,498 INFO L226 Difference]: Without dead ends: 5944 [2022-11-16 12:39:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:39:13,499 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:13,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 76 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 422 Unchecked, 1.4s Time] [2022-11-16 12:39:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2022-11-16 12:39:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 5368. [2022-11-16 12:39:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5363 states have (on average 3.8629498415066195) internal successors, (20717), 5367 states have internal predecessors, (20717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 20717 transitions. [2022-11-16 12:39:13,597 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 20717 transitions. Word has length 17 [2022-11-16 12:39:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:13,597 INFO L495 AbstractCegarLoop]: Abstraction has 5368 states and 20717 transitions. [2022-11-16 12:39:13,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 20717 transitions. [2022-11-16 12:39:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:13,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:13,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:13,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-16 12:39:13,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:13,801 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 648306441, now seen corresponding path program 2 times [2022-11-16 12:39:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:13,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486847260] [2022-11-16 12:39:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:13,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:13,803 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:13,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 12:39:14,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:14,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:39:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:14,273 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:14,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:15,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:39:15,079 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 73 treesize of output 69 [2022-11-16 12:39:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:15,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:15,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:15,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:15,823 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 70 treesize of output 68 [2022-11-16 12:39:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:17,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:17,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486847260] [2022-11-16 12:39:17,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486847260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:17,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:17,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:39:17,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799959813] [2022-11-16 12:39:17,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:39:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:39:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:39:17,385 INFO L87 Difference]: Start difference. First operand 5368 states and 20717 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:24,361 INFO L93 Difference]: Finished difference Result 7225 states and 27698 transitions. [2022-11-16 12:39:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:39:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:24,380 INFO L225 Difference]: With dead ends: 7225 [2022-11-16 12:39:24,380 INFO L226 Difference]: Without dead ends: 7225 [2022-11-16 12:39:24,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:39:24,380 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 245 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:24,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 69 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 326 Invalid, 0 Unknown, 350 Unchecked, 2.5s Time] [2022-11-16 12:39:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2022-11-16 12:39:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 5404. [2022-11-16 12:39:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5404 states, 5399 states have (on average 3.862567142063345) internal successors, (20854), 5403 states have internal predecessors, (20854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 20854 transitions. [2022-11-16 12:39:24,493 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 20854 transitions. Word has length 17 [2022-11-16 12:39:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:24,493 INFO L495 AbstractCegarLoop]: Abstraction has 5404 states and 20854 transitions. [2022-11-16 12:39:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 20854 transitions. [2022-11-16 12:39:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:24,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:24,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:24,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:39:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:24,697 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash 271809093, now seen corresponding path program 3 times [2022-11-16 12:39:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:24,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661043263] [2022-11-16 12:39:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:39:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:24,699 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:24,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 12:39:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:39:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:25,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:39:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:25,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:25,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:25,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:39:25,909 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 83 treesize of output 79 [2022-11-16 12:39:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:25,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:26,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:26,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:26,393 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 70 treesize of output 68 [2022-11-16 12:39:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:27,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661043263] [2022-11-16 12:39:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661043263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:27,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:27,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:39:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41383653] [2022-11-16 12:39:27,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:39:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:39:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:27,611 INFO L87 Difference]: Start difference. First operand 5404 states and 20854 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:34,119 INFO L93 Difference]: Finished difference Result 7461 states and 28642 transitions. [2022-11-16 12:39:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:39:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:34,141 INFO L225 Difference]: With dead ends: 7461 [2022-11-16 12:39:34,141 INFO L226 Difference]: Without dead ends: 7461 [2022-11-16 12:39:34,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:39:34,142 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 220 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:34,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 81 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 442 Invalid, 0 Unknown, 505 Unchecked, 3.2s Time] [2022-11-16 12:39:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7461 states. [2022-11-16 12:39:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7461 to 5574. [2022-11-16 12:39:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5574 states, 5569 states have (on average 3.878434189261986) internal successors, (21599), 5573 states have internal predecessors, (21599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 21599 transitions. [2022-11-16 12:39:34,313 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 21599 transitions. Word has length 17 [2022-11-16 12:39:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:34,314 INFO L495 AbstractCegarLoop]: Abstraction has 5574 states and 21599 transitions. [2022-11-16 12:39:34,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 21599 transitions. [2022-11-16 12:39:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:34,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:34,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:34,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-16 12:39:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:34,518 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1051337276, now seen corresponding path program 1 times [2022-11-16 12:39:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810292424] [2022-11-16 12:39:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:34,520 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:34,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 12:39:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:39:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:35,021 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:35,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:35,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:35,516 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 39 treesize of output 43 [2022-11-16 12:39:35,525 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 29 treesize of output 27 [2022-11-16 12:39:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:35,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:35,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:35,670 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 70 treesize of output 68 [2022-11-16 12:39:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:36,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810292424] [2022-11-16 12:39:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810292424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:36,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:36,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:39:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637051924] [2022-11-16 12:39:36,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:36,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:39:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:39:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:36,327 INFO L87 Difference]: Start difference. First operand 5574 states and 21599 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:37,965 INFO L93 Difference]: Finished difference Result 6152 states and 23211 transitions. [2022-11-16 12:39:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:39:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:37,980 INFO L225 Difference]: With dead ends: 6152 [2022-11-16 12:39:37,981 INFO L226 Difference]: Without dead ends: 6152 [2022-11-16 12:39:37,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:39:37,981 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:37,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 69 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 289 Invalid, 0 Unknown, 346 Unchecked, 1.4s Time] [2022-11-16 12:39:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-11-16 12:39:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 5576. [2022-11-16 12:39:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5571 states have (on average 3.8786573326153295) internal successors, (21608), 5575 states have internal predecessors, (21608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 21608 transitions. [2022-11-16 12:39:38,072 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 21608 transitions. Word has length 17 [2022-11-16 12:39:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:38,072 INFO L495 AbstractCegarLoop]: Abstraction has 5576 states and 21608 transitions. [2022-11-16 12:39:38,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 21608 transitions. [2022-11-16 12:39:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:38,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:38,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:38,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-16 12:39:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:38,276 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1330520158, now seen corresponding path program 2 times [2022-11-16 12:39:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370793462] [2022-11-16 12:39:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:38,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:38,278 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:38,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 12:39:38,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:39:38,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:38,713 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:38,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:39,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:39,054 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 44 treesize of output 46 [2022-11-16 12:39:39,060 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 29 treesize of output 27 [2022-11-16 12:39:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:39:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:39,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:39,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:39,176 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 70 treesize of output 68 [2022-11-16 12:39:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:39:39,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370793462] [2022-11-16 12:39:39,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370793462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:39,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:39,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 12:39:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312481963] [2022-11-16 12:39:39,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:39,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:39:39,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:39:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:39:39,634 INFO L87 Difference]: Start difference. First operand 5576 states and 21608 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:41,324 INFO L93 Difference]: Finished difference Result 7179 states and 27324 transitions. [2022-11-16 12:39:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:39:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:41,344 INFO L225 Difference]: With dead ends: 7179 [2022-11-16 12:39:41,344 INFO L226 Difference]: Without dead ends: 7179 [2022-11-16 12:39:41,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:39:41,345 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 133 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:41,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 69 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 353 Invalid, 0 Unknown, 59 Unchecked, 1.4s Time] [2022-11-16 12:39:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-11-16 12:39:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 5626. [2022-11-16 12:39:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5621 states have (on average 3.87866927592955) internal successors, (21802), 5625 states have internal predecessors, (21802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 21802 transitions. [2022-11-16 12:39:41,514 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 21802 transitions. Word has length 17 [2022-11-16 12:39:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:41,514 INFO L495 AbstractCegarLoop]: Abstraction has 5626 states and 21802 transitions. [2022-11-16 12:39:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 21802 transitions. [2022-11-16 12:39:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:41,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:41,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:41,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-16 12:39:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:41,718 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 819036396, now seen corresponding path program 2 times [2022-11-16 12:39:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31991171] [2022-11-16 12:39:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:41,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:41,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:41,721 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:41,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 12:39:42,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:39:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:42,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:42,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:42,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:39:42,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-11-16 12:39:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:43,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:43,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:43,573 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 70 treesize of output 68 [2022-11-16 12:39:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:45,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:45,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31991171] [2022-11-16 12:39:45,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31991171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:45,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:45,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:39:45,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437985787] [2022-11-16 12:39:45,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:45,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:39:45,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:45,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:39:45,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:39:45,305 INFO L87 Difference]: Start difference. First operand 5626 states and 21802 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:39:52,658 INFO L93 Difference]: Finished difference Result 8550 states and 33096 transitions. [2022-11-16 12:39:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:39:52,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:39:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:39:52,716 INFO L225 Difference]: With dead ends: 8550 [2022-11-16 12:39:52,716 INFO L226 Difference]: Without dead ends: 8550 [2022-11-16 12:39:52,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:39:52,716 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 308 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:39:52,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 98 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 432 Invalid, 0 Unknown, 435 Unchecked, 3.5s Time] [2022-11-16 12:39:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8550 states. [2022-11-16 12:39:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8550 to 5871. [2022-11-16 12:39:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5871 states, 5866 states have (on average 3.9023184452778725) internal successors, (22891), 5870 states have internal predecessors, (22891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5871 states to 5871 states and 22891 transitions. [2022-11-16 12:39:52,852 INFO L78 Accepts]: Start accepts. Automaton has 5871 states and 22891 transitions. Word has length 17 [2022-11-16 12:39:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:39:52,852 INFO L495 AbstractCegarLoop]: Abstraction has 5871 states and 22891 transitions. [2022-11-16 12:39:52,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:39:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5871 states and 22891 transitions. [2022-11-16 12:39:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:39:52,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:39:52,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:39:52,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 12:39:53,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:53,057 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:39:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -907037708, now seen corresponding path program 3 times [2022-11-16 12:39:53,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:39:53,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737122035] [2022-11-16 12:39:53,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:39:53,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:39:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:39:53,058 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:39:53,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 12:39:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:39:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:53,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:39:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:53,633 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:39:53,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:39:54,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:39:54,337 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 83 treesize of output 79 [2022-11-16 12:39:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:54,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:54,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:39:54,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:39:54,818 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 70 treesize of output 68 [2022-11-16 12:39:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:56,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:39:56,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737122035] [2022-11-16 12:39:56,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737122035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:56,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:39:56,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:39:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585472509] [2022-11-16 12:39:56,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:56,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:39:56,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:39:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:39:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:39:56,013 INFO L87 Difference]: Start difference. First operand 5871 states and 22891 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:03,576 INFO L93 Difference]: Finished difference Result 7992 states and 31110 transitions. [2022-11-16 12:40:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:40:03,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:03,601 INFO L225 Difference]: With dead ends: 7992 [2022-11-16 12:40:03,602 INFO L226 Difference]: Without dead ends: 7992 [2022-11-16 12:40:03,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:40:03,602 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 158 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:03,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 82 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 438 Invalid, 0 Unknown, 260 Unchecked, 3.6s Time] [2022-11-16 12:40:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2022-11-16 12:40:03,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 6016. [2022-11-16 12:40:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6011 states have (on average 3.9153219098319747) internal successors, (23535), 6015 states have internal predecessors, (23535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 23535 transitions. [2022-11-16 12:40:03,739 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 23535 transitions. Word has length 17 [2022-11-16 12:40:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:03,740 INFO L495 AbstractCegarLoop]: Abstraction has 6016 states and 23535 transitions. [2022-11-16 12:40:03,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 23535 transitions. [2022-11-16 12:40:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:03,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:03,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:03,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 12:40:03,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:03,944 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:40:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:03,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1713827076, now seen corresponding path program 3 times [2022-11-16 12:40:03,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:03,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971481198] [2022-11-16 12:40:03,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:40:03,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:03,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:03,945 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:40:03,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 12:40:04,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:40:04,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:40:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:04,366 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:40:04,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:40:04,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:04,741 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 44 treesize of output 46 [2022-11-16 12:40:04,749 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 29 treesize of output 27 [2022-11-16 12:40:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:40:04,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:04,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:04,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:40:04,892 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 70 treesize of output 68 [2022-11-16 12:40:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:40:05,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971481198] [2022-11-16 12:40:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971481198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:05,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:05,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 12:40:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988173729] [2022-11-16 12:40:05,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:40:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:40:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:40:05,304 INFO L87 Difference]: Start difference. First operand 6016 states and 23535 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:06,319 INFO L93 Difference]: Finished difference Result 7397 states and 28465 transitions. [2022-11-16 12:40:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:40:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:06,378 INFO L225 Difference]: With dead ends: 7397 [2022-11-16 12:40:06,379 INFO L226 Difference]: Without dead ends: 7397 [2022-11-16 12:40:06,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:40:06,381 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:06,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 194 Unchecked, 0.7s Time] [2022-11-16 12:40:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-11-16 12:40:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 6067. [2022-11-16 12:40:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6067 states, 6062 states have (on average 3.90498185417354) internal successors, (23672), 6066 states have internal predecessors, (23672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6067 states to 6067 states and 23672 transitions. [2022-11-16 12:40:06,563 INFO L78 Accepts]: Start accepts. Automaton has 6067 states and 23672 transitions. Word has length 17 [2022-11-16 12:40:06,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:06,563 INFO L495 AbstractCegarLoop]: Abstraction has 6067 states and 23672 transitions. [2022-11-16 12:40:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6067 states and 23672 transitions. [2022-11-16 12:40:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:06,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:06,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:06,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-16 12:40:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:06,769 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:40:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1783269072, now seen corresponding path program 4 times [2022-11-16 12:40:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:06,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585258580] [2022-11-16 12:40:06,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:40:06,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:06,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:06,771 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:40:06,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 12:40:07,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:40:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:40:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:07,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:40:07,284 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 [2022-11-16 12:40:07,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:07,889 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 39 treesize of output 43 [2022-11-16 12:40:07,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-16 12:40:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:07,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:08,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:08,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:40:08,007 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 70 treesize of output 68 [2022-11-16 12:40:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:08,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:08,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585258580] [2022-11-16 12:40:08,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585258580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:08,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:08,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 12:40:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698019674] [2022-11-16 12:40:08,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:08,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:40:08,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:08,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:40:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:40:08,628 INFO L87 Difference]: Start difference. First operand 6067 states and 23672 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:10,043 INFO L93 Difference]: Finished difference Result 5630 states and 20812 transitions. [2022-11-16 12:40:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:40:10,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:10,056 INFO L225 Difference]: With dead ends: 5630 [2022-11-16 12:40:10,056 INFO L226 Difference]: Without dead ends: 5630 [2022-11-16 12:40:10,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:40:10,056 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:10,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 71 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 394 Unchecked, 1.2s Time] [2022-11-16 12:40:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2022-11-16 12:40:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 4329. [2022-11-16 12:40:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4329 states, 4324 states have (on average 3.7987974098057355) internal successors, (16426), 4328 states have internal predecessors, (16426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4329 states to 4329 states and 16426 transitions. [2022-11-16 12:40:10,131 INFO L78 Accepts]: Start accepts. Automaton has 4329 states and 16426 transitions. Word has length 17 [2022-11-16 12:40:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:10,132 INFO L495 AbstractCegarLoop]: Abstraction has 4329 states and 16426 transitions. [2022-11-16 12:40:10,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4329 states and 16426 transitions. [2022-11-16 12:40:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:10,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:10,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:10,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-16 12:40:10,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:10,335 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:40:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -349777402, now seen corresponding path program 4 times [2022-11-16 12:40:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5247332] [2022-11-16 12:40:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:40:10,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:10,336 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:40:10,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 12:40:10,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:40:10,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:10,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:40:10,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:10,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:40:10,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:40:11,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:40:11,982 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 95 treesize of output 91 [2022-11-16 12:40:12,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:12,009 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 98 treesize of output 100 [2022-11-16 12:40:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:12,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:12,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:12,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:40:12,414 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 70 treesize of output 68 [2022-11-16 12:40:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:13,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5247332] [2022-11-16 12:40:13,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5247332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:13,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:13,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:40:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320171641] [2022-11-16 12:40:13,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:40:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:40:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:40:13,691 INFO L87 Difference]: Start difference. First operand 4329 states and 16426 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:18,650 INFO L93 Difference]: Finished difference Result 5849 states and 21519 transitions. [2022-11-16 12:40:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:40:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:18,665 INFO L225 Difference]: With dead ends: 5849 [2022-11-16 12:40:18,665 INFO L226 Difference]: Without dead ends: 5849 [2022-11-16 12:40:18,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:40:18,666 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 498 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:18,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 129 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 426 Invalid, 0 Unknown, 831 Unchecked, 2.3s Time] [2022-11-16 12:40:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2022-11-16 12:40:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 4509. [2022-11-16 12:40:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4504 states have (on average 3.8126110124333925) internal successors, (17172), 4508 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 17172 transitions. [2022-11-16 12:40:18,749 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 17172 transitions. Word has length 17 [2022-11-16 12:40:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:18,749 INFO L495 AbstractCegarLoop]: Abstraction has 4509 states and 17172 transitions. [2022-11-16 12:40:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 17172 transitions. [2022-11-16 12:40:18,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:18,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:18,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:40:18,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 12:40:18,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:18,953 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:40:18,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1038829910, now seen corresponding path program 5 times [2022-11-16 12:40:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:18,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56072490] [2022-11-16 12:40:18,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:40:18,954 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 [2022-11-16 12:40:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:18,955 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:40:18,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 12:40:19,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:40:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:19,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:40:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:19,581 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:40:19,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:40:20,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:40:20,467 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 95 treesize of output 91 [2022-11-16 12:40:20,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:20,498 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 103 treesize of output 103 [2022-11-16 12:40:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:20,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:20,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:20,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:40:20,855 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 70 treesize of output 68 [2022-11-16 12:40:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:21,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56072490] [2022-11-16 12:40:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56072490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:21,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:40:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473076275] [2022-11-16 12:40:21,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:40:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:40:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:40:21,614 INFO L87 Difference]: Start difference. First operand 4509 states and 17172 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:40:25,553 INFO L93 Difference]: Finished difference Result 5208 states and 19250 transitions. [2022-11-16 12:40:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:40:25,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:40:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:40:25,567 INFO L225 Difference]: With dead ends: 5208 [2022-11-16 12:40:25,567 INFO L226 Difference]: Without dead ends: 5208 [2022-11-16 12:40:25,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:40:25,567 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 283 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:40:25,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 121 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 525 Invalid, 0 Unknown, 742 Unchecked, 3.1s Time] [2022-11-16 12:40:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2022-11-16 12:40:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4501. [2022-11-16 12:40:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4496 states have (on average 3.8131672597864767) internal successors, (17144), 4500 states have internal predecessors, (17144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 17144 transitions. [2022-11-16 12:40:25,647 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 17144 transitions. Word has length 17 [2022-11-16 12:40:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:40:25,647 INFO L495 AbstractCegarLoop]: Abstraction has 4501 states and 17144 transitions. [2022-11-16 12:40:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:40:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 17144 transitions. [2022-11-16 12:40:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:40:25,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:40:25,650 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 12:40:25,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-16 12:40:25,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:25,851 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:40:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:40:25,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1399440790, now seen corresponding path program 6 times [2022-11-16 12:40:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:40:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648985715] [2022-11-16 12:40:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:40:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:40:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:40:25,852 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:40:25,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 12:40:26,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 12:40:26,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:40:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:40:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:40:26,426 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:40:26,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:40:27,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:40:27,705 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 83 treesize of output 79 [2022-11-16 12:40:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:27,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:40:28,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:40:28,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:40:28,948 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 70 treesize of output 68 [2022-11-16 12:40:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:40:31,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:40:31,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648985715] [2022-11-16 12:40:31,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648985715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:40:31,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:40:31,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:40:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330885049] [2022-11-16 12:40:31,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:40:31,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:40:31,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:40:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:40:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:40:31,221 INFO L87 Difference]: Start difference. First operand 4501 states and 17144 transitions. Second operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:14,725 INFO L93 Difference]: Finished difference Result 9544 states and 34687 transitions. [2022-11-16 12:41:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:41:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:41:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:14,752 INFO L225 Difference]: With dead ends: 9544 [2022-11-16 12:41:14,752 INFO L226 Difference]: Without dead ends: 9544 [2022-11-16 12:41:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=963, Invalid=3197, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:41:14,753 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1499 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:14,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 575 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 24.9s Time] [2022-11-16 12:41:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9544 states. [2022-11-16 12:41:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9544 to 6113. [2022-11-16 12:41:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6113 states, 6108 states have (on average 3.859201047806156) internal successors, (23572), 6112 states have internal predecessors, (23572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6113 states to 6113 states and 23572 transitions. [2022-11-16 12:41:14,919 INFO L78 Accepts]: Start accepts. Automaton has 6113 states and 23572 transitions. Word has length 17 [2022-11-16 12:41:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:14,920 INFO L495 AbstractCegarLoop]: Abstraction has 6113 states and 23572 transitions. [2022-11-16 12:41:14,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6113 states and 23572 transitions. [2022-11-16 12:41:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:41:14,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:14,924 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:14,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 12:41:15,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:41:15,124 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:41:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash 353681778, now seen corresponding path program 5 times [2022-11-16 12:41:15,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:41:15,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193115158] [2022-11-16 12:41:15,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:41:15,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:41:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:41:15,126 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:41:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 12:41:15,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:41:15,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:15,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:41:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:15,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:41:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:41:16,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:41:16,745 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 83 treesize of output 79 [2022-11-16 12:41:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:16,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:17,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:17,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:41:17,550 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 70 treesize of output 68 [2022-11-16 12:41:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:19,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:41:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193115158] [2022-11-16 12:41:19,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193115158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:19,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:19,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 12:41:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306785823] [2022-11-16 12:41:19,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:41:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:41:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:41:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:41:19,183 INFO L87 Difference]: Start difference. First operand 6113 states and 23572 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:41:24,589 INFO L93 Difference]: Finished difference Result 7000 states and 26456 transitions. [2022-11-16 12:41:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:41:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:41:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:41:24,611 INFO L225 Difference]: With dead ends: 7000 [2022-11-16 12:41:24,611 INFO L226 Difference]: Without dead ends: 7000 [2022-11-16 12:41:24,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:41:24,612 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 249 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:41:24,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 171 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 477 Invalid, 0 Unknown, 150 Unchecked, 2.3s Time] [2022-11-16 12:41:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7000 states. [2022-11-16 12:41:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7000 to 6129. [2022-11-16 12:41:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6129 states, 6124 states have (on average 3.858262573481385) internal successors, (23628), 6128 states have internal predecessors, (23628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6129 states to 6129 states and 23628 transitions. [2022-11-16 12:41:24,743 INFO L78 Accepts]: Start accepts. Automaton has 6129 states and 23628 transitions. Word has length 17 [2022-11-16 12:41:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:41:24,744 INFO L495 AbstractCegarLoop]: Abstraction has 6129 states and 23628 transitions. [2022-11-16 12:41:24,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6129 states and 23628 transitions. [2022-11-16 12:41:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:41:24,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:41:24,748 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:41:24,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 12:41:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:41:24,948 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:41:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:24,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2060830866, now seen corresponding path program 1 times [2022-11-16 12:41:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:41:24,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334123305] [2022-11-16 12:41:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:41:24,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:41:24,950 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:41:24,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 12:41:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:41:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:25,435 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:41:25,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:41:26,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:41:26,389 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 83 treesize of output 79 [2022-11-16 12:41:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:26,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:26,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:41:26,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:41:26,982 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 70 treesize of output 68 [2022-11-16 12:41:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:28,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:41:28,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334123305] [2022-11-16 12:41:28,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334123305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:28,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:41:28,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:41:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319337537] [2022-11-16 12:41:28,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:28,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:41:28,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:41:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:41:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:41:28,986 INFO L87 Difference]: Start difference. First operand 6129 states and 23628 transitions. Second operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:06,128 INFO L93 Difference]: Finished difference Result 15375 states and 58140 transitions. [2022-11-16 12:42:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:42:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:42:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:06,182 INFO L225 Difference]: With dead ends: 15375 [2022-11-16 12:42:06,183 INFO L226 Difference]: Without dead ends: 15375 [2022-11-16 12:42:06,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=792, Invalid=3368, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 12:42:06,183 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1545 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 3380 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 880 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:06,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 560 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3380 Invalid, 0 Unknown, 880 Unchecked, 21.8s Time] [2022-11-16 12:42:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15375 states. [2022-11-16 12:42:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15375 to 6122. [2022-11-16 12:42:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 6117 states have (on average 3.860062121955207) internal successors, (23612), 6121 states have internal predecessors, (23612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 23612 transitions. [2022-11-16 12:42:06,428 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 23612 transitions. Word has length 17 [2022-11-16 12:42:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 6122 states and 23612 transitions. [2022-11-16 12:42:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 23612 transitions. [2022-11-16 12:42:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:42:06,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:06,433 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:06,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 12:42:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:06,633 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:42:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1857679188, now seen corresponding path program 2 times [2022-11-16 12:42:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:42:06,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740875917] [2022-11-16 12:42:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:06,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:42:06,635 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:42:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 12:42:06,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:42:06,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:07,132 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:42:07,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:42:07,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:42:07,898 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 83 treesize of output 79 [2022-11-16 12:42:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:07,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:08,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:08,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:42:08,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:42:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:10,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:42:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740875917] [2022-11-16 12:42:10,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740875917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:10,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:10,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:42:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366330515] [2022-11-16 12:42:10,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:42:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:42:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:42:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:42:10,531 INFO L87 Difference]: Start difference. First operand 6122 states and 23612 transitions. Second operand has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:43,178 INFO L93 Difference]: Finished difference Result 14636 states and 54867 transitions. [2022-11-16 12:42:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 12:42:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:42:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:43,222 INFO L225 Difference]: With dead ends: 14636 [2022-11-16 12:42:43,222 INFO L226 Difference]: Without dead ends: 14636 [2022-11-16 12:42:43,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2022-11-16 12:42:43,223 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2187 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 3448 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 4200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:43,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 618 Invalid, 4200 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 3448 Invalid, 0 Unknown, 707 Unchecked, 19.3s Time] [2022-11-16 12:42:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14636 states. [2022-11-16 12:42:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14636 to 6120. [2022-11-16 12:42:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6115 states have (on average 3.8605069501226494) internal successors, (23607), 6119 states have internal predecessors, (23607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 23607 transitions. [2022-11-16 12:42:43,394 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 23607 transitions. Word has length 17 [2022-11-16 12:42:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:43,394 INFO L495 AbstractCegarLoop]: Abstraction has 6120 states and 23607 transitions. [2022-11-16 12:42:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 23607 transitions. [2022-11-16 12:42:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:42:43,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:43,397 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:43,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-16 12:42:43,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:43,597 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:42:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:43,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1607434788, now seen corresponding path program 3 times [2022-11-16 12:42:43,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:42:43,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185586227] [2022-11-16 12:42:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:42:43,598 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:42:43,599 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:42:43,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 12:42:43,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:42:43,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:43,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:42:43,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:44,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:42:44,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:42:44,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:42:44,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 79 [2022-11-16 12:42:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:42:44,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:45,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:45,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:42:45,080 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 70 treesize of output 68 [2022-11-16 12:42:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:42:46,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:42:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185586227] [2022-11-16 12:42:46,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185586227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:46,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:46,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:42:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062086048] [2022-11-16 12:42:46,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:46,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:42:46,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:42:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:42:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:42:46,054 INFO L87 Difference]: Start difference. First operand 6120 states and 23607 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:42:52,844 INFO L93 Difference]: Finished difference Result 8391 states and 31368 transitions. [2022-11-16 12:42:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:42:52,846 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 17 [2022-11-16 12:42:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:42:52,947 INFO L225 Difference]: With dead ends: 8391 [2022-11-16 12:42:52,947 INFO L226 Difference]: Without dead ends: 8391 [2022-11-16 12:42:52,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:42:52,947 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 540 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:42:52,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 127 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 12:42:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8391 states. [2022-11-16 12:42:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8391 to 4288. [2022-11-16 12:42:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4283 states have (on average 3.7228578099462992) internal successors, (15945), 4287 states have internal predecessors, (15945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 15945 transitions. [2022-11-16 12:42:53,032 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 15945 transitions. Word has length 17 [2022-11-16 12:42:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:42:53,032 INFO L495 AbstractCegarLoop]: Abstraction has 4288 states and 15945 transitions. [2022-11-16 12:42:53,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:42:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 15945 transitions. [2022-11-16 12:42:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:42:53,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:42:53,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:42:53,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-16 12:42:53,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:53,236 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:42:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -265537691, now seen corresponding path program 2 times [2022-11-16 12:42:53,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:42:53,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130152254] [2022-11-16 12:42:53,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:42:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:42:53,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:42:53,238 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:42:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 12:42:53,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:42:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:42:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:42:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:53,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:42:53,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:42:54,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:42:54,618 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 90 treesize of output 86 [2022-11-16 12:42:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:55,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:42:55,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:42:55,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:42:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:56,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:42:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130152254] [2022-11-16 12:42:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130152254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:56,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:42:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 12:42:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153541138] [2022-11-16 12:42:56,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:42:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:42:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:42:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:42:56,716 INFO L87 Difference]: Start difference. First operand 4288 states and 15945 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:14,279 INFO L93 Difference]: Finished difference Result 8829 states and 31960 transitions. [2022-11-16 12:43:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:43:14,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:43:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:14,302 INFO L225 Difference]: With dead ends: 8829 [2022-11-16 12:43:14,302 INFO L226 Difference]: Without dead ends: 8829 [2022-11-16 12:43:14,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=429, Invalid=1827, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:43:14,302 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 747 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1423 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:14,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 156 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1086 Invalid, 0 Unknown, 1423 Unchecked, 8.4s Time] [2022-11-16 12:43:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8829 states. [2022-11-16 12:43:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8829 to 6146. [2022-11-16 12:43:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6141 states have (on average 3.834228952939261) internal successors, (23546), 6145 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 23546 transitions. [2022-11-16 12:43:14,417 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 23546 transitions. Word has length 18 [2022-11-16 12:43:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:14,417 INFO L495 AbstractCegarLoop]: Abstraction has 6146 states and 23546 transitions. [2022-11-16 12:43:14,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 23546 transitions. [2022-11-16 12:43:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:43:14,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:14,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:14,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-16 12:43:14,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:14,621 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:43:14,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2066559755, now seen corresponding path program 4 times [2022-11-16 12:43:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:43:14,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372306997] [2022-11-16 12:43:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:43:14,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:43:14,623 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:43:14,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 12:43:14,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:43:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:14,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:43:14,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:15,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:43:15,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:43:15,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:43:15,997 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 95 treesize of output 91 [2022-11-16 12:43:16,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:16,020 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 98 treesize of output 100 [2022-11-16 12:43:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:16,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:16,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:16,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:43:16,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2022-11-16 12:43:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:17,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:43:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372306997] [2022-11-16 12:43:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372306997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:17,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:17,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:43:17,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161928647] [2022-11-16 12:43:17,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:17,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:43:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:43:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:43:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:43:17,497 INFO L87 Difference]: Start difference. First operand 6146 states and 23546 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:22,768 INFO L93 Difference]: Finished difference Result 7507 states and 27914 transitions. [2022-11-16 12:43:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:43:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:43:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:22,789 INFO L225 Difference]: With dead ends: 7507 [2022-11-16 12:43:22,789 INFO L226 Difference]: Without dead ends: 7507 [2022-11-16 12:43:22,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:43:22,790 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 568 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1002 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:22,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 125 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 556 Invalid, 0 Unknown, 1002 Unchecked, 3.5s Time] [2022-11-16 12:43:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2022-11-16 12:43:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 6426. [2022-11-16 12:43:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6426 states, 6421 states have (on average 3.8461298863105435) internal successors, (24696), 6425 states have internal predecessors, (24696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6426 states to 6426 states and 24696 transitions. [2022-11-16 12:43:22,994 INFO L78 Accepts]: Start accepts. Automaton has 6426 states and 24696 transitions. Word has length 18 [2022-11-16 12:43:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:22,994 INFO L495 AbstractCegarLoop]: Abstraction has 6426 states and 24696 transitions. [2022-11-16 12:43:22,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6426 states and 24696 transitions. [2022-11-16 12:43:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:43:22,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:22,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:23,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-16 12:43:23,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:23,200 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:43:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1887534283, now seen corresponding path program 5 times [2022-11-16 12:43:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:43:23,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510017475] [2022-11-16 12:43:23,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:43:23,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:43:23,202 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:43:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 12:43:23,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:43:23,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:43:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:23,715 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:43:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:43:24,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:43:24,473 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 83 treesize of output 79 [2022-11-16 12:43:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:24,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:24,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:24,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:43:24,843 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 70 treesize of output 68 [2022-11-16 12:43:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:25,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:43:25,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510017475] [2022-11-16 12:43:25,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510017475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:25,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:25,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:43:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141741016] [2022-11-16 12:43:25,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:25,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:43:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:43:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:43:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:43:25,875 INFO L87 Difference]: Start difference. First operand 6426 states and 24696 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:27,686 INFO L93 Difference]: Finished difference Result 6662 states and 25354 transitions. [2022-11-16 12:43:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:43:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:43:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:27,704 INFO L225 Difference]: With dead ends: 6662 [2022-11-16 12:43:27,704 INFO L226 Difference]: Without dead ends: 6662 [2022-11-16 12:43:27,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:43:27,704 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:27,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 112 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 309 Unchecked, 0.9s Time] [2022-11-16 12:43:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2022-11-16 12:43:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 6428. [2022-11-16 12:43:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6428 states, 6423 states have (on average 3.845866417561887) internal successors, (24702), 6427 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6428 states to 6428 states and 24702 transitions. [2022-11-16 12:43:27,823 INFO L78 Accepts]: Start accepts. Automaton has 6428 states and 24702 transitions. Word has length 18 [2022-11-16 12:43:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:27,823 INFO L495 AbstractCegarLoop]: Abstraction has 6428 states and 24702 transitions. [2022-11-16 12:43:27,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 6428 states and 24702 transitions. [2022-11-16 12:43:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:43:27,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:27,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:27,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 12:43:28,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:28,028 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:43:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1166722067, now seen corresponding path program 6 times [2022-11-16 12:43:28,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:43:28,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785612188] [2022-11-16 12:43:28,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:43:28,029 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 [2022-11-16 12:43:28,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:43:28,030 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:43:28,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 12:43:28,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 12:43:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:43:28,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:28,678 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:43:28,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:43:29,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:43:29,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 97 [2022-11-16 12:43:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:43:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:30,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:30,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:43:30,536 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 70 treesize of output 68 [2022-11-16 12:43:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:43:31,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:43:31,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785612188] [2022-11-16 12:43:31,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785612188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:31,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:31,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 12:43:31,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800827879] [2022-11-16 12:43:31,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:31,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:43:31,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:43:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:43:31,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:43:31,678 INFO L87 Difference]: Start difference. First operand 6428 states and 24702 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:33,826 INFO L93 Difference]: Finished difference Result 7028 states and 26632 transitions. [2022-11-16 12:43:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:43:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:43:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:33,845 INFO L225 Difference]: With dead ends: 7028 [2022-11-16 12:43:33,845 INFO L226 Difference]: Without dead ends: 7028 [2022-11-16 12:43:33,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:43:33,846 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:33,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 33 Unchecked, 1.1s Time] [2022-11-16 12:43:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7028 states. [2022-11-16 12:43:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7028 to 6583. [2022-11-16 12:43:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6578 states have (on average 3.8523867436910915) internal successors, (25341), 6582 states have internal predecessors, (25341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 25341 transitions. [2022-11-16 12:43:33,960 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 25341 transitions. Word has length 18 [2022-11-16 12:43:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:33,960 INFO L495 AbstractCegarLoop]: Abstraction has 6583 states and 25341 transitions. [2022-11-16 12:43:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 25341 transitions. [2022-11-16 12:43:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:43:33,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:33,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:33,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-16 12:43:34,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:34,164 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:43:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1649461833, now seen corresponding path program 2 times [2022-11-16 12:43:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:43:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447509365] [2022-11-16 12:43:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:43:34,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:43:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:43:34,166 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:43:34,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 12:43:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:43:34,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:43:34,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:43:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:34,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:43:34,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:43:35,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:43:35,981 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 91 treesize of output 87 [2022-11-16 12:43:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:36,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:36,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:36,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:43:36,944 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 70 treesize of output 68 [2022-11-16 12:43:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:39,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:43:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447509365] [2022-11-16 12:43:39,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447509365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:43:39,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:39,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:43:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842334755] [2022-11-16 12:43:39,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:39,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:43:39,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:43:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:43:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:43:39,125 INFO L87 Difference]: Start difference. First operand 6583 states and 25341 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:10,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:10,369 INFO L93 Difference]: Finished difference Result 14052 states and 52435 transitions. [2022-11-16 12:44:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 12:44:10,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:10,423 INFO L225 Difference]: With dead ends: 14052 [2022-11-16 12:44:10,423 INFO L226 Difference]: Without dead ends: 14052 [2022-11-16 12:44:10,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=604, Invalid=2702, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 12:44:10,423 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 789 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1132 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:10,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 182 Invalid, 2279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1133 Invalid, 0 Unknown, 1132 Unchecked, 14.7s Time] [2022-11-16 12:44:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14052 states. [2022-11-16 12:44:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14052 to 7224. [2022-11-16 12:44:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7224 states, 7219 states have (on average 3.8747748995705775) internal successors, (27972), 7223 states have internal predecessors, (27972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7224 states to 7224 states and 27972 transitions. [2022-11-16 12:44:10,691 INFO L78 Accepts]: Start accepts. Automaton has 7224 states and 27972 transitions. Word has length 19 [2022-11-16 12:44:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:10,691 INFO L495 AbstractCegarLoop]: Abstraction has 7224 states and 27972 transitions. [2022-11-16 12:44:10,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7224 states and 27972 transitions. [2022-11-16 12:44:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:10,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:10,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:10,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-16 12:44:10,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:10,898 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1785332360, now seen corresponding path program 3 times [2022-11-16 12:44:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:10,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687619415] [2022-11-16 12:44:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:10,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:10,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:10,900 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:10,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 12:44:11,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:44:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:11,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:44:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:11,676 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:11,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:12,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:12,764 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 95 treesize of output 91 [2022-11-16 12:44:12,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:12,788 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 98 treesize of output 100 [2022-11-16 12:44:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:12,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:13,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:13,304 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 70 treesize of output 68 [2022-11-16 12:44:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:14,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687619415] [2022-11-16 12:44:14,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687619415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:14,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:14,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:44:14,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618814343] [2022-11-16 12:44:14,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:44:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:44:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:44:14,564 INFO L87 Difference]: Start difference. First operand 7224 states and 27972 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:19,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:19,106 INFO L93 Difference]: Finished difference Result 8356 states and 31288 transitions. [2022-11-16 12:44:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:19,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:19,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:19,127 INFO L225 Difference]: With dead ends: 8356 [2022-11-16 12:44:19,127 INFO L226 Difference]: Without dead ends: 8356 [2022-11-16 12:44:19,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:44:19,127 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 466 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1342 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:19,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 173 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 531 Invalid, 0 Unknown, 1342 Unchecked, 3.3s Time] [2022-11-16 12:44:19,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2022-11-16 12:44:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6919. [2022-11-16 12:44:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6919 states, 6914 states have (on average 3.8691061614116284) internal successors, (26751), 6918 states have internal predecessors, (26751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6919 states to 6919 states and 26751 transitions. [2022-11-16 12:44:19,251 INFO L78 Accepts]: Start accepts. Automaton has 6919 states and 26751 transitions. Word has length 19 [2022-11-16 12:44:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:19,252 INFO L495 AbstractCegarLoop]: Abstraction has 6919 states and 26751 transitions. [2022-11-16 12:44:19,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6919 states and 26751 transitions. [2022-11-16 12:44:19,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:19,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:19,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:19,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-16 12:44:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:19,456 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -396725048, now seen corresponding path program 4 times [2022-11-16 12:44:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693042502] [2022-11-16 12:44:19,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:44:19,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:19,458 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:19,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 12:44:19,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:44:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:44:19,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:20,001 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:20,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:20,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:20,970 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 95 treesize of output 91 [2022-11-16 12:44:20,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,992 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 98 treesize of output 100 [2022-11-16 12:44:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:21,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:21,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:21,331 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 70 treesize of output 68 [2022-11-16 12:44:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:22,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:22,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693042502] [2022-11-16 12:44:22,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693042502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:22,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:22,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:44:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53179424] [2022-11-16 12:44:22,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:22,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:44:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:44:22,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:44:22,489 INFO L87 Difference]: Start difference. First operand 6919 states and 26751 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:26,187 INFO L93 Difference]: Finished difference Result 8464 states and 31931 transitions. [2022-11-16 12:44:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:26,212 INFO L225 Difference]: With dead ends: 8464 [2022-11-16 12:44:26,213 INFO L226 Difference]: Without dead ends: 8464 [2022-11-16 12:44:26,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:44:26,213 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 436 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:26,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 135 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 456 Invalid, 0 Unknown, 768 Unchecked, 2.6s Time] [2022-11-16 12:44:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2022-11-16 12:44:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 7172. [2022-11-16 12:44:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7172 states, 7167 states have (on average 3.866192270126971) internal successors, (27709), 7171 states have internal predecessors, (27709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7172 states to 7172 states and 27709 transitions. [2022-11-16 12:44:26,388 INFO L78 Accepts]: Start accepts. Automaton has 7172 states and 27709 transitions. Word has length 19 [2022-11-16 12:44:26,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:26,388 INFO L495 AbstractCegarLoop]: Abstraction has 7172 states and 27709 transitions. [2022-11-16 12:44:26,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7172 states and 27709 transitions. [2022-11-16 12:44:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:26,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:26,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:26,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-16 12:44:26,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:26,595 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash 540941236, now seen corresponding path program 5 times [2022-11-16 12:44:26,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:26,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049576196] [2022-11-16 12:44:26,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:44:26,597 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 [2022-11-16 12:44:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:26,597 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:26,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 12:44:27,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:44:27,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:44:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:27,169 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:27,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:28,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:28,018 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 83 treesize of output 79 [2022-11-16 12:44:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:28,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:28,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:28,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:28,570 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 70 treesize of output 68 [2022-11-16 12:44:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:29,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:29,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049576196] [2022-11-16 12:44:29,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049576196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:29,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:29,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:44:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547183893] [2022-11-16 12:44:29,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:29,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:44:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:44:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:44:29,891 INFO L87 Difference]: Start difference. First operand 7172 states and 27709 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:35,307 INFO L93 Difference]: Finished difference Result 8271 states and 31052 transitions. [2022-11-16 12:44:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:44:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:35,333 INFO L225 Difference]: With dead ends: 8271 [2022-11-16 12:44:35,334 INFO L226 Difference]: Without dead ends: 8271 [2022-11-16 12:44:35,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:44:35,334 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 357 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 914 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:35,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 135 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 677 Invalid, 0 Unknown, 914 Unchecked, 4.0s Time] [2022-11-16 12:44:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2022-11-16 12:44:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 6972. [2022-11-16 12:44:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6967 states have (on average 3.8561791301851587) internal successors, (26866), 6971 states have internal predecessors, (26866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 26866 transitions. [2022-11-16 12:44:35,501 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 26866 transitions. Word has length 19 [2022-11-16 12:44:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:35,501 INFO L495 AbstractCegarLoop]: Abstraction has 6972 states and 26866 transitions. [2022-11-16 12:44:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 26866 transitions. [2022-11-16 12:44:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:35,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:35,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:35,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-16 12:44:35,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:35,708 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1234270443, now seen corresponding path program 3 times [2022-11-16 12:44:35,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670716002] [2022-11-16 12:44:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:35,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:35,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:35,710 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:35,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 12:44:36,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:44:36,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:44:36,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:36,363 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:36,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:37,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:37,320 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 95 treesize of output 91 [2022-11-16 12:44:37,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:37,346 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 98 treesize of output 100 [2022-11-16 12:44:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:37,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:37,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:37,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:37,777 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 70 treesize of output 68 [2022-11-16 12:44:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:38,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:38,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670716002] [2022-11-16 12:44:38,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670716002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:38,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:38,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:44:38,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530521601] [2022-11-16 12:44:38,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:38,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:44:38,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:44:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:44:38,907 INFO L87 Difference]: Start difference. First operand 6972 states and 26866 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:43,439 INFO L93 Difference]: Finished difference Result 8500 states and 31640 transitions. [2022-11-16 12:44:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:44:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:43,461 INFO L225 Difference]: With dead ends: 8500 [2022-11-16 12:44:43,461 INFO L226 Difference]: Without dead ends: 8500 [2022-11-16 12:44:43,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:44:43,461 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 432 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 976 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:43,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 151 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 548 Invalid, 0 Unknown, 976 Unchecked, 3.4s Time] [2022-11-16 12:44:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8500 states. [2022-11-16 12:44:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8500 to 7057. [2022-11-16 12:44:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7057 states, 7052 states have (on average 3.8611741349971638) internal successors, (27229), 7056 states have internal predecessors, (27229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7057 states to 7057 states and 27229 transitions. [2022-11-16 12:44:43,616 INFO L78 Accepts]: Start accepts. Automaton has 7057 states and 27229 transitions. Word has length 19 [2022-11-16 12:44:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:43,616 INFO L495 AbstractCegarLoop]: Abstraction has 7057 states and 27229 transitions. [2022-11-16 12:44:43,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7057 states and 27229 transitions. [2022-11-16 12:44:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:43,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:43,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:43,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-16 12:44:43,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:43,822 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash 812788585, now seen corresponding path program 3 times [2022-11-16 12:44:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639288020] [2022-11-16 12:44:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:44:43,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:43,824 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 12:44:44,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:44:44,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:44,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:44:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:44,442 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:44,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:45,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:45,472 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 95 treesize of output 91 [2022-11-16 12:44:45,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:45,500 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 98 treesize of output 100 [2022-11-16 12:44:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:45,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:45,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:45,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:45,839 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 70 treesize of output 68 [2022-11-16 12:44:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:46,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:46,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639288020] [2022-11-16 12:44:46,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639288020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:46,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:46,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:44:46,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095038372] [2022-11-16 12:44:46,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:44:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:44:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:44:46,905 INFO L87 Difference]: Start difference. First operand 7057 states and 27229 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:51,305 INFO L93 Difference]: Finished difference Result 8696 states and 32547 transitions. [2022-11-16 12:44:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:51,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:51,327 INFO L225 Difference]: With dead ends: 8696 [2022-11-16 12:44:51,327 INFO L226 Difference]: Without dead ends: 8696 [2022-11-16 12:44:51,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:44:51,327 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 500 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1661 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:51,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 163 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 0 Unknown, 1661 Unchecked, 3.3s Time] [2022-11-16 12:44:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2022-11-16 12:44:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6888. [2022-11-16 12:44:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6888 states, 6883 states have (on average 3.8547145140200496) internal successors, (26532), 6887 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6888 states to 6888 states and 26532 transitions. [2022-11-16 12:44:51,472 INFO L78 Accepts]: Start accepts. Automaton has 6888 states and 26532 transitions. Word has length 19 [2022-11-16 12:44:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 6888 states and 26532 transitions. [2022-11-16 12:44:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6888 states and 26532 transitions. [2022-11-16 12:44:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:51,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:51,476 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:51,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:44:51,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:51,677 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 999343777, now seen corresponding path program 4 times [2022-11-16 12:44:51,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:51,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362485252] [2022-11-16 12:44:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:44:51,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:51,679 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:51,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 12:44:52,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:44:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:44:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:52,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:44:52,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:44:53,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:44:53,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:53,233 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 102 treesize of output 104 [2022-11-16 12:44:53,243 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 91 treesize of output 87 [2022-11-16 12:44:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:53,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:53,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:53,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:44:53,704 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 70 treesize of output 68 [2022-11-16 12:44:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:54,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:44:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362485252] [2022-11-16 12:44:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362485252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:54,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:54,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:44:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48383201] [2022-11-16 12:44:54,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:44:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:44:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:44:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:44:54,828 INFO L87 Difference]: Start difference. First operand 6888 states and 26532 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:59,158 INFO L93 Difference]: Finished difference Result 8782 states and 32815 transitions. [2022-11-16 12:44:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:44:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:44:59,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:59,180 INFO L225 Difference]: With dead ends: 8782 [2022-11-16 12:44:59,180 INFO L226 Difference]: Without dead ends: 8782 [2022-11-16 12:44:59,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:44:59,181 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 476 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1334 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:59,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 162 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 698 Invalid, 0 Unknown, 1334 Unchecked, 3.0s Time] [2022-11-16 12:44:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8782 states. [2022-11-16 12:44:59,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8782 to 6896. [2022-11-16 12:44:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6896 states, 6891 states have (on average 3.8522710782179654) internal successors, (26546), 6895 states have internal predecessors, (26546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6896 states to 6896 states and 26546 transitions. [2022-11-16 12:44:59,339 INFO L78 Accepts]: Start accepts. Automaton has 6896 states and 26546 transitions. Word has length 19 [2022-11-16 12:44:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:59,340 INFO L495 AbstractCegarLoop]: Abstraction has 6896 states and 26546 transitions. [2022-11-16 12:44:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:44:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6896 states and 26546 transitions. [2022-11-16 12:44:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:44:59,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:59,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:59,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-16 12:44:59,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:59,551 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:44:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash -890894109, now seen corresponding path program 5 times [2022-11-16 12:44:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:44:59,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060788687] [2022-11-16 12:44:59,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:44:59,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:44:59,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:44:59,553 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:44:59,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 12:44:59,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:44:59,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:44:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:44:59,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:00,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:45:00,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:45:00,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:45:00,848 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 83 treesize of output 79 [2022-11-16 12:45:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:00,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:01,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:01,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:45:01,514 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 70 treesize of output 68 [2022-11-16 12:45:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:02,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060788687] [2022-11-16 12:45:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060788687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:02,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:02,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:45:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063624146] [2022-11-16 12:45:02,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:45:02,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:02,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:45:02,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:45:02,453 INFO L87 Difference]: Start difference. First operand 6896 states and 26546 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:07,209 INFO L93 Difference]: Finished difference Result 7795 states and 29160 transitions. [2022-11-16 12:45:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:45:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:45:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:07,234 INFO L225 Difference]: With dead ends: 7795 [2022-11-16 12:45:07,234 INFO L226 Difference]: Without dead ends: 7795 [2022-11-16 12:45:07,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:45:07,234 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 246 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:07,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 120 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 676 Invalid, 0 Unknown, 475 Unchecked, 3.6s Time] [2022-11-16 12:45:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7795 states. [2022-11-16 12:45:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7795 to 7055. [2022-11-16 12:45:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7055 states, 7050 states have (on average 3.8512056737588654) internal successors, (27151), 7054 states have internal predecessors, (27151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7055 states to 7055 states and 27151 transitions. [2022-11-16 12:45:07,408 INFO L78 Accepts]: Start accepts. Automaton has 7055 states and 27151 transitions. Word has length 19 [2022-11-16 12:45:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:07,409 INFO L495 AbstractCegarLoop]: Abstraction has 7055 states and 27151 transitions. [2022-11-16 12:45:07,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7055 states and 27151 transitions. [2022-11-16 12:45:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:45:07,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:07,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:07,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:07,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:07,627 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:45:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1312375967, now seen corresponding path program 4 times [2022-11-16 12:45:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232482219] [2022-11-16 12:45:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:45:07,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:07,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:07,629 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:07,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-16 12:45:07,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:45:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:45:07,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:08,129 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:45:08,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:45:09,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:45:09,165 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 95 treesize of output 91 [2022-11-16 12:45:09,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:09,194 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 98 treesize of output 100 [2022-11-16 12:45:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:09,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:09,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:45:09,618 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 70 treesize of output 68 [2022-11-16 12:45:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:10,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232482219] [2022-11-16 12:45:10,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232482219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:10,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:10,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 12:45:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817525755] [2022-11-16 12:45:10,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:10,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:45:10,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:45:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:45:10,756 INFO L87 Difference]: Start difference. First operand 7055 states and 27151 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:12,458 INFO L93 Difference]: Finished difference Result 7588 states and 28730 transitions. [2022-11-16 12:45:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:45:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:45:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:12,477 INFO L225 Difference]: With dead ends: 7588 [2022-11-16 12:45:12,477 INFO L226 Difference]: Without dead ends: 7588 [2022-11-16 12:45:12,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:45:12,477 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:12,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 127 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 506 Unchecked, 0.9s Time] [2022-11-16 12:45:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2022-11-16 12:45:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 7063. [2022-11-16 12:45:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7058 states have (on average 3.8519410597903088) internal successors, (27187), 7062 states have internal predecessors, (27187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 27187 transitions. [2022-11-16 12:45:12,599 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 27187 transitions. Word has length 19 [2022-11-16 12:45:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:12,599 INFO L495 AbstractCegarLoop]: Abstraction has 7063 states and 27187 transitions. [2022-11-16 12:45:12,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 27187 transitions. [2022-11-16 12:45:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:45:12,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:12,604 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:12,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:12,804 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:45:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash 818308067, now seen corresponding path program 5 times [2022-11-16 12:45:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:12,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061147301] [2022-11-16 12:45:12,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:45:12,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:12,806 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:12,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 12:45:13,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:45:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:45:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:13,320 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:45:13,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:45:14,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 53 [2022-11-16 12:45:14,128 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 73 treesize of output 69 [2022-11-16 12:45:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:14,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:14,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:14,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:45:14,641 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 70 treesize of output 68 [2022-11-16 12:45:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:15,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:15,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061147301] [2022-11-16 12:45:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061147301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:15,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:15,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 12:45:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923011784] [2022-11-16 12:45:15,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:45:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:45:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:45:15,827 INFO L87 Difference]: Start difference. First operand 7063 states and 27187 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:23,815 INFO L93 Difference]: Finished difference Result 8465 states and 31502 transitions. [2022-11-16 12:45:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:45:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:45:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:23,837 INFO L225 Difference]: With dead ends: 8465 [2022-11-16 12:45:23,838 INFO L226 Difference]: Without dead ends: 8465 [2022-11-16 12:45:23,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:45:23,838 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 384 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:23,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 156 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 827 Invalid, 0 Unknown, 690 Unchecked, 6.1s Time] [2022-11-16 12:45:23,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2022-11-16 12:45:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 7051. [2022-11-16 12:45:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 7046 states have (on average 3.8508373545273913) internal successors, (27133), 7050 states have internal predecessors, (27133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 27133 transitions. [2022-11-16 12:45:24,020 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 27133 transitions. Word has length 19 [2022-11-16 12:45:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:24,020 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 27133 transitions. [2022-11-16 12:45:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 27133 transitions. [2022-11-16 12:45:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:45:24,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:24,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:24,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:24,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:24,226 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:45:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash 437326737, now seen corresponding path program 3 times [2022-11-16 12:45:24,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:24,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137045252] [2022-11-16 12:45:24,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:45:24,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:24,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:24,228 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:24,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 12:45:24,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:45:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:24,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:45:24,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:25,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:25,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 124 [2022-11-16 12:45:25,797 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 124 treesize of output 120 [2022-11-16 12:45:25,801 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 [2022-11-16 12:45:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:25,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:26,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:26,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:45:26,171 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 70 treesize of output 68 [2022-11-16 12:45:26,176 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 68 treesize of output 66 [2022-11-16 12:45:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:26,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:26,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137045252] [2022-11-16 12:45:26,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137045252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:26,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:26,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2022-11-16 12:45:26,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969688617] [2022-11-16 12:45:26,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:26,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:45:26,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:45:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:45:26,764 INFO L87 Difference]: Start difference. First operand 7051 states and 27133 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:35,004 INFO L93 Difference]: Finished difference Result 8234 states and 29077 transitions. [2022-11-16 12:45:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:45:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:45:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:35,024 INFO L225 Difference]: With dead ends: 8234 [2022-11-16 12:45:35,025 INFO L226 Difference]: Without dead ends: 8234 [2022-11-16 12:45:35,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:45:35,025 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 534 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:35,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 156 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1639 Invalid, 0 Unknown, 407 Unchecked, 6.3s Time] [2022-11-16 12:45:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2022-11-16 12:45:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 4948. [2022-11-16 12:45:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4943 states have (on average 3.776856160226583) internal successors, (18669), 4947 states have internal predecessors, (18669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 18669 transitions. [2022-11-16 12:45:35,133 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 18669 transitions. Word has length 20 [2022-11-16 12:45:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:35,134 INFO L495 AbstractCegarLoop]: Abstraction has 4948 states and 18669 transitions. [2022-11-16 12:45:35,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 18669 transitions. [2022-11-16 12:45:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:45:35,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:35,138 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:45:35,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-16 12:45:35,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:35,339 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:45:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1109683022, now seen corresponding path program 6 times [2022-11-16 12:45:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:35,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151749695] [2022-11-16 12:45:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:45:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:35,340 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:35,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 12:45:35,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 12:45:35,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:45:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:35,975 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:45:35,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 12:45:36,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:45:36,735 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 83 treesize of output 79 [2022-11-16 12:45:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:36,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:38,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:45:38,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:45:38,436 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 70 treesize of output 68 [2022-11-16 12:45:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:41,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:41,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151749695] [2022-11-16 12:45:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151749695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:41,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2022-11-16 12:45:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943739750] [2022-11-16 12:45:41,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:45:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:45:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:45:41,741 INFO L87 Difference]: Start difference. First operand 4948 states and 18669 transitions. Second operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:56,669 INFO L93 Difference]: Finished difference Result 7492 states and 26908 transitions. [2022-11-16 12:45:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:45:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 12:45:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:56,689 INFO L225 Difference]: With dead ends: 7492 [2022-11-16 12:45:56,690 INFO L226 Difference]: Without dead ends: 7492 [2022-11-16 12:45:56,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:45:56,690 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 963 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:56,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 378 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2945 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2022-11-16 12:45:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-16 12:45:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 4379. [2022-11-16 12:45:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4374 states have (on average 3.706904435299497) internal successors, (16214), 4378 states have internal predecessors, (16214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 16214 transitions. [2022-11-16 12:45:56,780 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 16214 transitions. Word has length 21 [2022-11-16 12:45:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:56,780 INFO L495 AbstractCegarLoop]: Abstraction has 4379 states and 16214 transitions. [2022-11-16 12:45:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 16214 transitions. [2022-11-16 12:45:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:45:56,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:56,784 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1] [2022-11-16 12:45:56,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:56,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:56,984 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 12:45:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 857248383, now seen corresponding path program 7 times [2022-11-16 12:45:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800044003] [2022-11-16 12:45:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:45:56,985 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 [2022-11-16 12:45:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:56,986 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:56,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b62f96ae-ae01-41a6-9ba6-40588b7975ec/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 12:45:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:57,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:45:57,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:57,560 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:45:57,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:45:58,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 63 [2022-11-16 12:45:58,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 79 [2022-11-16 12:45:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:59,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:00,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:46:00,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 70 [2022-11-16 12:46:00,230 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 70 treesize of output 68 [2022-11-16 12:46:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:01,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800044003] [2022-11-16 12:46:01,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800044003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:01,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:01,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-16 12:46:01,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858749381] [2022-11-16 12:46:01,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:46:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:46:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:46:01,770 INFO L87 Difference]: Start difference. First operand 4379 states and 16214 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)