./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/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_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/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_cdde0892-a8e1-4545-a08d-e5cccb416a32/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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- 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 12:04:07,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:04:07,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:04:07,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:04:07,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:04:07,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:04:07,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:04:07,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:04:07,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:04:07,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:04:07,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:04:07,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:04:07,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:04:07,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:04:07,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:04:07,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:04:07,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:04:07,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:04:07,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:04:07,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:04:07,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:04:07,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:04:07,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:04:07,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:04:07,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:04:07,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:04:07,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:04:07,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:04:07,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:04:07,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:04:07,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:04:07,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:04:07,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:04:07,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:04:07,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:04:07,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:04:07,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:04:07,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:04:07,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:04:07,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:04:07,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:04:07,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:04:07,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:04:07,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:04:07,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:04:07,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:04:07,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:04:07,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:04:07,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:04:07,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:04:07,774 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:04:07,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:04:07,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:04:07,775 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:04:07,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:04:07,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:04:07,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:04:07,776 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:04:07,776 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:04:07,776 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:04:07,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:04:07,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:04:07,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:04:07,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:04:07,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:04:07,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:04:07,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:04:07,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:04:07,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:04:07,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:04:07,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:04:07,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:04:07,779 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-11-16 12:04:08,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:04:08,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:04:08,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:04:08,112 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:04:08,113 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:04:08,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-16 12:04:08,206 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/313febd5e/04d134e033a2404a9bcd6b80ce8f7838/FLAG5eda32666 [2022-11-16 12:04:08,723 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:04:08,723 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-16 12:04:08,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/313febd5e/04d134e033a2404a9bcd6b80ce8f7838/FLAG5eda32666 [2022-11-16 12:04:09,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/313febd5e/04d134e033a2404a9bcd6b80ce8f7838 [2022-11-16 12:04:09,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:04:09,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:04:09,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:04:09,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:04:09,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:04:09,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:04:09" (1/1) ... [2022-11-16 12:04:09,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334a5bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:09, skipping insertion in model container [2022-11-16 12:04:09,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:04:09" (1/1) ... [2022-11-16 12:04:09,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:04:09,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:04:09,465 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-16 12:04:09,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:04:09,500 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 12:04:09,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@120f14d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:09, skipping insertion in model container [2022-11-16 12:04:09,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:04:09,502 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:04:09,505 INFO L158 Benchmark]: Toolchain (without parser) took 403.66ms. Allocated memory is still 117.4MB. Free memory was 75.9MB in the beginning and 91.4MB in the end (delta: -15.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:04:09,506 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 93.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:04:09,508 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.97ms. Allocated memory is still 117.4MB. Free memory was 75.7MB in the beginning and 91.4MB in the end (delta: -15.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:04:09,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 117.4MB. Free memory is still 93.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.97ms. Allocated memory is still 117.4MB. Free memory was 75.7MB in the beginning and 91.4MB in the end (delta: -15.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/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_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/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_cdde0892-a8e1-4545-a08d-e5cccb416a32/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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- 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 12:04:11,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:04:11,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:04:11,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:04:11,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:04:11,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:04:11,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:04:11,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:04:11,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:04:11,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:04:11,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:04:11,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:04:11,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:04:11,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:04:11,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:04:11,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:04:11,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:04:11,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:04:11,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:04:11,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:04:11,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:04:11,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:04:11,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:04:11,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:04:11,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:04:11,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:04:11,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:04:11,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:04:11,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:04:11,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:04:11,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:04:11,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:04:11,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:04:11,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:04:11,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:04:11,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:04:11,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:04:11,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:04:11,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:04:11,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:04:11,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:04:11,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:04:11,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:04:11,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:04:11,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:04:11,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:04:11,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:04:11,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:04:11,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:04:11,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:04:11,930 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:04:11,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:04:11,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:04:11,932 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:04:11,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:04:11,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:04:11,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:04:11,933 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:04:11,933 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:04:11,933 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:04:11,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:04:11,934 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:04:11,934 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:04:11,934 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:04:11,934 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:04:11,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:04:11,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:04:11,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:04:11,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:04:11,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:04:11,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:04:11,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:04:11,937 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:04:11,937 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:04:11,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:04:11,937 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2022-11-16 12:04:12,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:04:12,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:04:12,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:04:12,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:04:12,379 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:04:12,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-16 12:04:12,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/7c40390f0/f0242d41510348c5a2e7cb4b1133fb0f/FLAGa7ac2c458 [2022-11-16 12:04:13,060 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:04:13,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2022-11-16 12:04:13,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/7c40390f0/f0242d41510348c5a2e7cb4b1133fb0f/FLAGa7ac2c458 [2022-11-16 12:04:13,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/data/7c40390f0/f0242d41510348c5a2e7cb4b1133fb0f [2022-11-16 12:04:13,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:04:13,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:04:13,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:04:13,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:04:13,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:04:13,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6365a64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13, skipping insertion in model container [2022-11-16 12:04:13,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:04:13,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:04:13,649 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-16 12:04:13,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:04:13,723 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:04:13,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:04:13,772 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-16 12:04:13,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:04:13,781 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:04:13,838 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_cdde0892-a8e1-4545-a08d-e5cccb416a32/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2022-11-16 12:04:13,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:04:13,870 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:04:13,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13 WrapperNode [2022-11-16 12:04:13,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:04:13,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:04:13,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:04:13,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:04:13,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,962 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 325 [2022-11-16 12:04:13,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:04:13,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:04:13,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:04:13,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:04:13,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:13,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:04:14,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:04:14,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:04:14,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:04:14,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (1/1) ... [2022-11-16 12:04:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:04:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:14,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:04:14,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:04:14,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:04:14,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:04:14,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:04:14,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:04:14,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:04:14,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:04:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:04:14,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:04:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:04:14,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:04:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:04:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:04:14,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:04:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:04:14,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:04:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:04:14,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:04:14,145 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 12:04:14,337 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:04:14,352 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:04:15,224 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:04:15,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:04:15,500 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:04:15,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:04:15 BoogieIcfgContainer [2022-11-16 12:04:15,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:04:15,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:04:15,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:04:15,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:04:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:04:13" (1/3) ... [2022-11-16 12:04:15,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491bbb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:04:15, skipping insertion in model container [2022-11-16 12:04:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:04:13" (2/3) ... [2022-11-16 12:04:15,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491bbb5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:04:15, skipping insertion in model container [2022-11-16 12:04:15,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:04:15" (3/3) ... [2022-11-16 12:04:15,517 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2022-11-16 12:04:15,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:04:15,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 36 error locations. [2022-11-16 12:04:15,544 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:04:15,692 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:04:15,744 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:04:15,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 300 transitions, 624 flow [2022-11-16 12:04:15,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 300 transitions, 624 flow [2022-11-16 12:04:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 300 transitions, 624 flow [2022-11-16 12:04:15,947 INFO L130 PetriNetUnfolder]: 27/297 cut-off events. [2022-11-16 12:04:15,947 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:04:15,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 297 events. 27/297 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 305 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 243. Up to 6 conditions per place. [2022-11-16 12:04:15,966 INFO L119 LiptonReduction]: Number of co-enabled transitions 4670 [2022-11-16 12:05:04,397 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 145 DAG size of output: 142 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 12:05:11,236 INFO L134 LiptonReduction]: Checked pairs total: 5988 [2022-11-16 12:05:11,237 INFO L136 LiptonReduction]: Total number of compositions: 355 [2022-11-16 12:05:11,245 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 64 transitions, 152 flow [2022-11-16 12:05:11,389 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1904 states, 1052 states have (on average 6.36787072243346) internal successors, (6699), 1903 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:11,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:05:11,419 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;@fa8a9a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:05:11,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-16 12:05:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 1904 states, 1052 states have (on average 6.36787072243346) internal successors, (6699), 1903 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:05:11,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:11,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:05:11,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash 47837, now seen corresponding path program 1 times [2022-11-16 12:05:11,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637643148] [2022-11-16 12:05:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:11,457 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 12:05:11,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:11,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:11,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:11,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:05:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:11,818 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:05:11,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:05:11,853 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 12:05:11,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:11,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637643148] [2022-11-16 12:05:11,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637643148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:11,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:11,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:05:11,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457169047] [2022-11-16 12:05:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:11,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:11,895 INFO L87 Difference]: Start difference. First operand has 1904 states, 1052 states have (on average 6.36787072243346) internal successors, (6699), 1903 states have internal predecessors, (6699), 0 states have call successors, (0), 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 12:05:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:12,282 INFO L93 Difference]: Finished difference Result 1900 states and 6695 transitions. [2022-11-16 12:05:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:12,284 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 12:05:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:12,316 INFO L225 Difference]: With dead ends: 1900 [2022-11-16 12:05:12,316 INFO L226 Difference]: Without dead ends: 1900 [2022-11-16 12:05:12,317 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 12:05:12,320 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:12,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:05:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-11-16 12:05:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1900. [2022-11-16 12:05:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1052 states have (on average 6.364068441064639) internal successors, (6695), 1899 states have internal predecessors, (6695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:12,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6695 transitions. [2022-11-16 12:05:12,490 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6695 transitions. Word has length 2 [2022-11-16 12:05:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:12,490 INFO L495 AbstractCegarLoop]: Abstraction has 1900 states and 6695 transitions. [2022-11-16 12:05:12,490 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 12:05:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6695 transitions. [2022-11-16 12:05:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:05:12,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:12,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:05:12,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:12,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:12,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 47838, now seen corresponding path program 1 times [2022-11-16 12:05:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964172561] [2022-11-16 12:05:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:12,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:12,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:05:12,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:12,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:12,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:05:13,030 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 12:05:13,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:13,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964172561] [2022-11-16 12:05:13,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964172561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:13,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:13,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:05:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353010172] [2022-11-16 12:05:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:13,034 INFO L87 Difference]: Start difference. First operand 1900 states and 6695 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 12:05:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:13,816 INFO L93 Difference]: Finished difference Result 3796 states and 13386 transitions. [2022-11-16 12:05:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:13,817 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 12:05:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:13,850 INFO L225 Difference]: With dead ends: 3796 [2022-11-16 12:05:13,850 INFO L226 Difference]: Without dead ends: 3796 [2022-11-16 12:05:13,851 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 12:05:13,855 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:13,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:05:13,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2022-11-16 12:05:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 1903. [2022-11-16 12:05:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1055 states have (on average 6.3535545023696685) internal successors, (6703), 1902 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 6703 transitions. [2022-11-16 12:05:13,974 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 6703 transitions. Word has length 2 [2022-11-16 12:05:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:13,974 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 6703 transitions. [2022-11-16 12:05:13,975 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 12:05:13,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 6703 transitions. [2022-11-16 12:05:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:05:13,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:13,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:05:13,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:14,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:14,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1489989, now seen corresponding path program 1 times [2022-11-16 12:05:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:14,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35532906] [2022-11-16 12:05:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:14,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:14,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:14,190 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:14,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:05:14,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:14,482 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:14,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:05:14,580 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 12:05:14,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:14,868 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 12:05:14,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35532906] [2022-11-16 12:05:14,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35532906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:14,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:14,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:05:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360435847] [2022-11-16 12:05:14,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:05:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:14,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:05:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:05:14,871 INFO L87 Difference]: Start difference. First operand 1903 states and 6703 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 12:05:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:18,156 INFO L93 Difference]: Finished difference Result 5698 states and 20093 transitions. [2022-11-16 12:05:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:05:18,157 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 12:05:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:18,214 INFO L225 Difference]: With dead ends: 5698 [2022-11-16 12:05:18,214 INFO L226 Difference]: Without dead ends: 5698 [2022-11-16 12:05:18,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:05:18,222 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:18,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 0 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 12:05:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2022-11-16 12:05:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 1912. [2022-11-16 12:05:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1064 states have (on average 6.322368421052632) internal successors, (6727), 1911 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6727 transitions. [2022-11-16 12:05:18,494 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6727 transitions. Word has length 3 [2022-11-16 12:05:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:18,527 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 6727 transitions. [2022-11-16 12:05:18,527 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 12:05:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6727 transitions. [2022-11-16 12:05:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:05:18,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:18,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:05:18,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:18,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:18,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 46264383, now seen corresponding path program 1 times [2022-11-16 12:05:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916371257] [2022-11-16 12:05:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:18,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:18,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:18,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:18,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:05:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:19,031 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 12:05:19,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 12:05:19,097 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 12:05:19,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:05:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:19,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:05:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:19,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:05:19,267 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 12:05:19,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:19,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916371257] [2022-11-16 12:05:19,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916371257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:19,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:19,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012563162] [2022-11-16 12:05:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:19,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:19,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:19,269 INFO L87 Difference]: Start difference. First operand 1912 states and 6727 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:19,652 INFO L93 Difference]: Finished difference Result 1551 states and 5282 transitions. [2022-11-16 12:05:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 12:05:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:19,662 INFO L225 Difference]: With dead ends: 1551 [2022-11-16 12:05:19,662 INFO L226 Difference]: Without dead ends: 1551 [2022-11-16 12:05:19,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:19,663 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:19,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 12:05:19,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-11-16 12:05:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2022-11-16 12:05:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 929 states have (on average 5.685683530678149) internal successors, (5282), 1550 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 5282 transitions. [2022-11-16 12:05:19,799 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 5282 transitions. Word has length 4 [2022-11-16 12:05:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:19,799 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 5282 transitions. [2022-11-16 12:05:19,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 5282 transitions. [2022-11-16 12:05:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:05:19,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:19,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:05:19,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:05:20,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:20,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 46264382, now seen corresponding path program 1 times [2022-11-16 12:05:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:20,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900927697] [2022-11-16 12:05:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:20,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:20,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:20,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:20,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:20,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:05:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:20,312 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 12:05:20,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 12:05:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:20,663 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:05:20,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:05:23,051 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 12:05:23,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-16 12:05:25,744 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 12:05:25,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:25,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:25,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900927697] [2022-11-16 12:05:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900927697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:25,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645022546] [2022-11-16 12:05:25,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-16 12:05:25,746 INFO L87 Difference]: Start difference. First operand 1551 states and 5282 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:26,026 INFO L93 Difference]: Finished difference Result 1553 states and 5286 transitions. [2022-11-16 12:05:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 12:05:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:26,037 INFO L225 Difference]: With dead ends: 1553 [2022-11-16 12:05:26,037 INFO L226 Difference]: Without dead ends: 1553 [2022-11-16 12:05:26,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-16 12:05:26,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:26,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2022-11-16 12:05:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-11-16 12:05:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1553. [2022-11-16 12:05:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 931 states have (on average 5.677765843179377) internal successors, (5286), 1552 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 5286 transitions. [2022-11-16 12:05:26,121 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 5286 transitions. Word has length 4 [2022-11-16 12:05:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:26,121 INFO L495 AbstractCegarLoop]: Abstraction has 1553 states and 5286 transitions. [2022-11-16 12:05:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 5286 transitions. [2022-11-16 12:05:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:05:26,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:26,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:05:26,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:26,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:26,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1432171493, now seen corresponding path program 1 times [2022-11-16 12:05:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820858599] [2022-11-16 12:05:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:26,336 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:26,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:26,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:05:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:26,573 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 12:05:26,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 12:05:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:26,934 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:05:26,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:05:27,297 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 12:05:27,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-16 12:05:29,859 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 12:05:29,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:29,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:29,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820858599] [2022-11-16 12:05:29,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820858599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:29,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:29,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:05:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034435568] [2022-11-16 12:05:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:05:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:05:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-16 12:05:29,861 INFO L87 Difference]: Start difference. First operand 1553 states and 5286 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:30,123 INFO L93 Difference]: Finished difference Result 1554 states and 5288 transitions. [2022-11-16 12:05:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:05:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:30,133 INFO L225 Difference]: With dead ends: 1554 [2022-11-16 12:05:30,134 INFO L226 Difference]: Without dead ends: 1554 [2022-11-16 12:05:30,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-16 12:05:30,135 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:30,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-16 12:05:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-16 12:05:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1552. [2022-11-16 12:05:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 930 states have (on average 5.681720430107527) internal successors, (5284), 1551 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5284 transitions. [2022-11-16 12:05:30,203 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5284 transitions. Word has length 5 [2022-11-16 12:05:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:30,203 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 5284 transitions. [2022-11-16 12:05:30,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5284 transitions. [2022-11-16 12:05:30,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:05:30,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:30,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:05:30,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-16 12:05:30,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:30,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:30,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1434100220, now seen corresponding path program 1 times [2022-11-16 12:05:30,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:30,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072391473] [2022-11-16 12:05:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:30,420 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 12:05:30,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:30,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:30,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:05:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:30,702 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 12:05:30,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 12:05:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:30,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:05:30,875 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:05:30,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:05:30,892 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 12:05:30,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:30,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072391473] [2022-11-16 12:05:30,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072391473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:30,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:30,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:30,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359175450] [2022-11-16 12:05:30,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:30,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:30,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:30,894 INFO L87 Difference]: Start difference. First operand 1552 states and 5284 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 12:05:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:31,287 INFO L93 Difference]: Finished difference Result 1191 states and 3839 transitions. [2022-11-16 12:05:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:05:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:31,318 INFO L225 Difference]: With dead ends: 1191 [2022-11-16 12:05:31,325 INFO L226 Difference]: Without dead ends: 1191 [2022-11-16 12:05:31,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 12:05:31,326 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:31,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 12:05:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-11-16 12:05:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1190. [2022-11-16 12:05:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 794 states have (on average 4.832493702770781) internal successors, (3837), 1189 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3837 transitions. [2022-11-16 12:05:31,387 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3837 transitions. Word has length 5 [2022-11-16 12:05:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:31,387 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 3837 transitions. [2022-11-16 12:05:31,388 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 12:05:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3837 transitions. [2022-11-16 12:05:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:05:31,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:31,388 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:05:31,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:31,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:05:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1445551262, now seen corresponding path program 2 times [2022-11-16 12:05:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:31,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356742763] [2022-11-16 12:05:31,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:31,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:31,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:05:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:05:31,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:31,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:05:31,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:31,873 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:31,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:05:32,053 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 12:05:32,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:32,861 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 12:05:32,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:32,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356742763] [2022-11-16 12:05:32,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356742763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:32,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:32,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:05:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582105580] [2022-11-16 12:05:32,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:32,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:05:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:05:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:05:32,863 INFO L87 Difference]: Start difference. First operand 1190 states and 3837 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 12:05:37,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:38,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:40,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:42,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:44,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:46,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:48,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:49,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:51,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:53,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:55,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:05:57,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:01,594 INFO L93 Difference]: Finished difference Result 9404 states and 30491 transitions. [2022-11-16 12:06:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:06:01,596 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 12:06:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:01,646 INFO L225 Difference]: With dead ends: 9404 [2022-11-16 12:06:01,647 INFO L226 Difference]: Without dead ends: 9404 [2022-11-16 12:06:01,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:06:01,648 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1248 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 181 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:01,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 0 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1418 Invalid, 3 Unknown, 0 Unchecked, 26.8s Time] [2022-11-16 12:06:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2022-11-16 12:06:01,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 1206. [2022-11-16 12:06:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 810 states have (on average 4.777777777777778) internal successors, (3870), 1205 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 3870 transitions. [2022-11-16 12:06:01,796 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 3870 transitions. Word has length 6 [2022-11-16 12:06:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:01,796 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 3870 transitions. [2022-11-16 12:06:01,796 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 12:06:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 3870 transitions. [2022-11-16 12:06:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:01,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:01,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:01,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:02,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:02,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1510432944, now seen corresponding path program 1 times [2022-11-16 12:06:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:02,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937443125] [2022-11-16 12:06:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:02,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:02,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:02,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:02,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:02,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:02,142 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 12:06:02,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:02,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937443125] [2022-11-16 12:06:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937443125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:02,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:02,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:06:02,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505245583] [2022-11-16 12:06:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:02,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:02,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:02,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:02,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:02,144 INFO L87 Difference]: Start difference. First operand 1206 states and 3870 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:02,653 INFO L93 Difference]: Finished difference Result 1936 states and 6264 transitions. [2022-11-16 12:06:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:02,663 INFO L225 Difference]: With dead ends: 1936 [2022-11-16 12:06:02,663 INFO L226 Difference]: Without dead ends: 1936 [2022-11-16 12:06:02,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:02,664 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:02,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2022-11-16 12:06:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1286. [2022-11-16 12:06:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 898 states have (on average 5.169265033407572) internal successors, (4642), 1285 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 4642 transitions. [2022-11-16 12:06:02,739 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 4642 transitions. Word has length 6 [2022-11-16 12:06:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:02,740 INFO L495 AbstractCegarLoop]: Abstraction has 1286 states and 4642 transitions. [2022-11-16 12:06:02,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 4642 transitions. [2022-11-16 12:06:02,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:02,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:02,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:02,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:02,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:02,953 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1510433015, now seen corresponding path program 1 times [2022-11-16 12:06:02,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:02,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50009696] [2022-11-16 12:06:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:02,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:02,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:02,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:02,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:06:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:06:03,108 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 12:06:03,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:03,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:03,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50009696] [2022-11-16 12:06:03,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50009696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:03,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:03,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449994136] [2022-11-16 12:06:03,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:03,110 INFO L87 Difference]: Start difference. First operand 1286 states and 4642 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:03,447 INFO L93 Difference]: Finished difference Result 1002 states and 3538 transitions. [2022-11-16 12:06:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:03,453 INFO L225 Difference]: With dead ends: 1002 [2022-11-16 12:06:03,453 INFO L226 Difference]: Without dead ends: 1002 [2022-11-16 12:06:03,453 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 12:06:03,454 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:03,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:06:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-16 12:06:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-16 12:06:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 717 states have (on average 4.9344490934449095) internal successors, (3538), 1001 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3538 transitions. [2022-11-16 12:06:03,502 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3538 transitions. Word has length 6 [2022-11-16 12:06:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:03,502 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 3538 transitions. [2022-11-16 12:06:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3538 transitions. [2022-11-16 12:06:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:03,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:03,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:03,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:03,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:03,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1510433016, now seen corresponding path program 1 times [2022-11-16 12:06:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450768575] [2022-11-16 12:06:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:03,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:03,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:03,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:06:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:03,858 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 12:06:03,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:03,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:03,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450768575] [2022-11-16 12:06:03,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450768575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:03,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:03,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:06:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153982628] [2022-11-16 12:06:03,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:03,861 INFO L87 Difference]: Start difference. First operand 1002 states and 3538 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:04,283 INFO L93 Difference]: Finished difference Result 1396 states and 5014 transitions. [2022-11-16 12:06:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:04,290 INFO L225 Difference]: With dead ends: 1396 [2022-11-16 12:06:04,291 INFO L226 Difference]: Without dead ends: 1396 [2022-11-16 12:06:04,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:04,292 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:04,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:06:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-11-16 12:06:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1166. [2022-11-16 12:06:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 881 states have (on average 5.005675368898978) internal successors, (4410), 1165 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 4410 transitions. [2022-11-16 12:06:04,330 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 4410 transitions. Word has length 6 [2022-11-16 12:06:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:04,330 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 4410 transitions. [2022-11-16 12:06:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 4410 transitions. [2022-11-16 12:06:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:04,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:04,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:04,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:04,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1510432984, now seen corresponding path program 1 times [2022-11-16 12:06:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154328763] [2022-11-16 12:06:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:04,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:04,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:04,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:06:04,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,876 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 12:06:04,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 12:06:04,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 12:06:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:06:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:04,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:06:05,056 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 12:06:05,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:05,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:05,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154328763] [2022-11-16 12:06:05,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154328763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:05,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:05,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:05,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278623502] [2022-11-16 12:06:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:05,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:05,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:05,058 INFO L87 Difference]: Start difference. First operand 1166 states and 4410 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 12:06:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:05,386 INFO L93 Difference]: Finished difference Result 1130 states and 4307 transitions. [2022-11-16 12:06:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:05,387 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 12:06:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:05,393 INFO L225 Difference]: With dead ends: 1130 [2022-11-16 12:06:05,394 INFO L226 Difference]: Without dead ends: 1130 [2022-11-16 12:06:05,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 12:06:05,394 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:05,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 0 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-16 12:06:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-11-16 12:06:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1130. [2022-11-16 12:06:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 869 states have (on average 4.956271576524741) internal successors, (4307), 1129 states have internal predecessors, (4307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 4307 transitions. [2022-11-16 12:06:05,429 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 4307 transitions. Word has length 6 [2022-11-16 12:06:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:05,429 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 4307 transitions. [2022-11-16 12:06:05,429 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 12:06:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 4307 transitions. [2022-11-16 12:06:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:05,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:05,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:05,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:05,642 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1510432985, now seen corresponding path program 1 times [2022-11-16 12:06:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:05,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17894098] [2022-11-16 12:06:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:05,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:05,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:05,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:05,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:05,935 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:06:05,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:06:06,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:06,213 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:06:06,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:06:06,390 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 12:06:06,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:06:06,549 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 12:06:06,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:06,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17894098] [2022-11-16 12:06:06,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17894098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:06,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:06,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:06,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138139868] [2022-11-16 12:06:06,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:06,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:06,551 INFO L87 Difference]: Start difference. First operand 1130 states and 4307 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 12:06:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:06,803 INFO L93 Difference]: Finished difference Result 1134 states and 4315 transitions. [2022-11-16 12:06:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:06,803 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 12:06:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:06,809 INFO L225 Difference]: With dead ends: 1134 [2022-11-16 12:06:06,809 INFO L226 Difference]: Without dead ends: 1134 [2022-11-16 12:06:06,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:06,812 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:06,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-16 12:06:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-16 12:06:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2022-11-16 12:06:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 873 states have (on average 4.942726231386025) internal successors, (4315), 1133 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 4315 transitions. [2022-11-16 12:06:06,849 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 4315 transitions. Word has length 6 [2022-11-16 12:06:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:06,849 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 4315 transitions. [2022-11-16 12:06:06,849 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 12:06:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 4315 transitions. [2022-11-16 12:06:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:06:06,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:06,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:07,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:07,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1927304896, now seen corresponding path program 1 times [2022-11-16 12:06:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:07,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042945343] [2022-11-16 12:06:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:07,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:07,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:07,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:06:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:07,339 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:06:07,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:06:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:07,632 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:06:07,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:06:07,857 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 12:06:07,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:06:07,994 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 12:06:07,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:07,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042945343] [2022-11-16 12:06:07,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042945343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:07,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579536673] [2022-11-16 12:06:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:07,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:07,996 INFO L87 Difference]: Start difference. First operand 1134 states and 4315 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,222 INFO L93 Difference]: Finished difference Result 1137 states and 4321 transitions. [2022-11-16 12:06:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:06:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,228 INFO L225 Difference]: With dead ends: 1137 [2022-11-16 12:06:08,229 INFO L226 Difference]: Without dead ends: 1137 [2022-11-16 12:06:08,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,229 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-16 12:06:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-11-16 12:06:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1133. [2022-11-16 12:06:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 872 states have (on average 4.946100917431193) internal successors, (4313), 1132 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 4313 transitions. [2022-11-16 12:06:08,276 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 4313 transitions. Word has length 7 [2022-11-16 12:06:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:08,276 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 4313 transitions. [2022-11-16 12:06:08,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 4313 transitions. [2022-11-16 12:06:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:06:08,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:08,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:08,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:08,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash -514155753, now seen corresponding path program 1 times [2022-11-16 12:06:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26841525] [2022-11-16 12:06:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:08,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:08,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:08,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:08,785 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:06:08,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:06:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:09,043 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 12:06:09,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 12:06:09,297 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 12:06:09,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:06:09,443 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 12:06:09,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:09,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26841525] [2022-11-16 12:06:09,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26841525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:09,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590743244] [2022-11-16 12:06:09,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:09,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:09,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:09,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:09,445 INFO L87 Difference]: Start difference. First operand 1133 states and 4313 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:09,663 INFO L93 Difference]: Finished difference Result 1150 states and 4349 transitions. [2022-11-16 12:06:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:09,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:06:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:09,668 INFO L225 Difference]: With dead ends: 1150 [2022-11-16 12:06:09,669 INFO L226 Difference]: Without dead ends: 1150 [2022-11-16 12:06:09,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:09,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:09,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-16 12:06:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-16 12:06:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1144. [2022-11-16 12:06:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 883 states have (on average 4.911664779161948) internal successors, (4337), 1143 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 4337 transitions. [2022-11-16 12:06:09,707 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 4337 transitions. Word has length 7 [2022-11-16 12:06:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:09,707 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 4337 transitions. [2022-11-16 12:06:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 4337 transitions. [2022-11-16 12:06:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:06:09,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:09,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:09,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:09,922 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -423025084, now seen corresponding path program 1 times [2022-11-16 12:06:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773016650] [2022-11-16 12:06:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:09,924 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:09,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:10,201 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 12:06:10,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 12:06:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:10,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:10,327 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:06:10,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:10,376 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 12:06:10,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:10,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:10,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773016650] [2022-11-16 12:06:10,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773016650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:10,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:10,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848007413] [2022-11-16 12:06:10,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:10,378 INFO L87 Difference]: Start difference. First operand 1144 states and 4337 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:10,697 INFO L93 Difference]: Finished difference Result 1108 states and 4234 transitions. [2022-11-16 12:06:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:06:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:10,703 INFO L225 Difference]: With dead ends: 1108 [2022-11-16 12:06:10,703 INFO L226 Difference]: Without dead ends: 1108 [2022-11-16 12:06:10,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 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 12:06:10,706 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:10,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 12:06:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-11-16 12:06:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1094. [2022-11-16 12:06:10,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 857 states have (on average 4.905484247374562) internal successors, (4204), 1093 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4204 transitions. [2022-11-16 12:06:10,758 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4204 transitions. Word has length 7 [2022-11-16 12:06:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:10,759 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 4204 transitions. [2022-11-16 12:06:10,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4204 transitions. [2022-11-16 12:06:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:06:10,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:10,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:10,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:10,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:10,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash -421213878, now seen corresponding path program 1 times [2022-11-16 12:06:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478073201] [2022-11-16 12:06:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:10,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:10,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:11,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:06:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:11,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:11,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478073201] [2022-11-16 12:06:11,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478073201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:11,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:11,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405364211] [2022-11-16 12:06:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:11,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:11,193 INFO L87 Difference]: Start difference. First operand 1094 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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 12:06:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:11,607 INFO L93 Difference]: Finished difference Result 1172 states and 3934 transitions. [2022-11-16 12:06:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 12:06:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:11,610 INFO L225 Difference]: With dead ends: 1172 [2022-11-16 12:06:11,610 INFO L226 Difference]: Without dead ends: 1172 [2022-11-16 12:06:11,611 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 12:06:11,612 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:11,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:06:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-11-16 12:06:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1006. [2022-11-16 12:06:11,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 769 states have (on average 4.569570871261378) internal successors, (3514), 1005 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3514 transitions. [2022-11-16 12:06:11,640 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3514 transitions. Word has length 7 [2022-11-16 12:06:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:11,640 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 3514 transitions. [2022-11-16 12:06:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) 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 12:06:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3514 transitions. [2022-11-16 12:06:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:06:11,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:11,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:11,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:11,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:11,854 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -172813476, now seen corresponding path program 1 times [2022-11-16 12:06:11,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:11,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941577800] [2022-11-16 12:06:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:11,855 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 12:06:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:11,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:11,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:12,001 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 12:06:12,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:12,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:12,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941577800] [2022-11-16 12:06:12,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941577800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:12,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:12,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:12,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132966733] [2022-11-16 12:06:12,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:12,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:12,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:12,003 INFO L87 Difference]: Start difference. First operand 1006 states and 3514 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:12,424 INFO L93 Difference]: Finished difference Result 1240 states and 4008 transitions. [2022-11-16 12:06:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:06:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:12,429 INFO L225 Difference]: With dead ends: 1240 [2022-11-16 12:06:12,429 INFO L226 Difference]: Without dead ends: 1240 [2022-11-16 12:06:12,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:12,430 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:12,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:06:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-11-16 12:06:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1034. [2022-11-16 12:06:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 797 states have (on average 4.627352572145546) internal successors, (3688), 1033 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3688 transitions. [2022-11-16 12:06:12,462 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3688 transitions. Word has length 8 [2022-11-16 12:06:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:12,463 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3688 transitions. [2022-11-16 12:06:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3688 transitions. [2022-11-16 12:06:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:06:12,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:12,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:12,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:12,676 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash -172813443, now seen corresponding path program 1 times [2022-11-16 12:06:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743251889] [2022-11-16 12:06:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:12,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:12,678 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:06:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:12,826 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 12:06:12,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:12,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:12,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743251889] [2022-11-16 12:06:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743251889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:12,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:06:12,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949560050] [2022-11-16 12:06:12,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:12,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:12,829 INFO L87 Difference]: Start difference. First operand 1034 states and 3688 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:13,309 INFO L93 Difference]: Finished difference Result 1348 states and 4924 transitions. [2022-11-16 12:06:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:13,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:06:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:13,314 INFO L225 Difference]: With dead ends: 1348 [2022-11-16 12:06:13,314 INFO L226 Difference]: Without dead ends: 1348 [2022-11-16 12:06:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:13,315 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-11-16 12:06:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1186. [2022-11-16 12:06:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 949 states have (on average 4.7523709167544785) internal successors, (4510), 1185 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 4510 transitions. [2022-11-16 12:06:13,349 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 4510 transitions. Word has length 8 [2022-11-16 12:06:13,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:13,349 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 4510 transitions. [2022-11-16 12:06:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 4510 transitions. [2022-11-16 12:06:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:06:13,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:13,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:13,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:13,551 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:13,551 INFO L85 PathProgramCache]: Analyzing trace with hash -172813448, now seen corresponding path program 1 times [2022-11-16 12:06:13,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:13,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071852989] [2022-11-16 12:06:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:13,552 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 12:06:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:13,553 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:13,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:06:13,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:13,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:13,905 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 12:06:13,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 12:06:13,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 12:06:13,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:13,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:06:14,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:06:14,111 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 12:06:14,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:14,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:14,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071852989] [2022-11-16 12:06:14,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071852989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:14,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:14,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348060411] [2022-11-16 12:06:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:14,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:14,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:14,113 INFO L87 Difference]: Start difference. First operand 1186 states and 4510 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:14,456 INFO L93 Difference]: Finished difference Result 1125 states and 4315 transitions. [2022-11-16 12:06:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:06:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:14,460 INFO L225 Difference]: With dead ends: 1125 [2022-11-16 12:06:14,461 INFO L226 Difference]: Without dead ends: 1125 [2022-11-16 12:06:14,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:14,461 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:14,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 12:06:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-16 12:06:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1125. [2022-11-16 12:06:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 925 states have (on average 4.664864864864865) internal successors, (4315), 1124 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 4315 transitions. [2022-11-16 12:06:14,491 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 4315 transitions. Word has length 8 [2022-11-16 12:06:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:14,492 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 4315 transitions. [2022-11-16 12:06:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 4315 transitions. [2022-11-16 12:06:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:06:14,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:14,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:14,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:14,705 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -172813447, now seen corresponding path program 1 times [2022-11-16 12:06:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842172356] [2022-11-16 12:06:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:14,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:14,706 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:14,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:14,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:14,936 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:14,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:15,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:15,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:15,164 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 12:06:15,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:15,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:15,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842172356] [2022-11-16 12:06:15,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842172356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:15,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:15,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10927645] [2022-11-16 12:06:15,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:15,166 INFO L87 Difference]: Start difference. First operand 1125 states and 4315 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:15,471 INFO L93 Difference]: Finished difference Result 1129 states and 4324 transitions. [2022-11-16 12:06:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:06:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:15,475 INFO L225 Difference]: With dead ends: 1129 [2022-11-16 12:06:15,475 INFO L226 Difference]: Without dead ends: 1129 [2022-11-16 12:06:15,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:15,476 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:15,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-16 12:06:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1129. [2022-11-16 12:06:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 929 states have (on average 4.654467168998924) internal successors, (4324), 1128 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 4324 transitions. [2022-11-16 12:06:15,500 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 4324 transitions. Word has length 8 [2022-11-16 12:06:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:15,501 INFO L495 AbstractCegarLoop]: Abstraction has 1129 states and 4324 transitions. [2022-11-16 12:06:15,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 4324 transitions. [2022-11-16 12:06:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:06:15,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:15,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:15,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-16 12:06:15,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:15,704 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:15,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1494821412, now seen corresponding path program 1 times [2022-11-16 12:06:15,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417537027] [2022-11-16 12:06:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:15,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:15,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:15,705 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:15,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:15,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:16,017 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:16,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:16,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:16,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:16,249 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 12:06:16,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:16,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:16,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417537027] [2022-11-16 12:06:16,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417537027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:16,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:16,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911513894] [2022-11-16 12:06:16,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:16,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:16,251 INFO L87 Difference]: Start difference. First operand 1129 states and 4324 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:16,640 INFO L93 Difference]: Finished difference Result 1128 states and 4320 transitions. [2022-11-16 12:06:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:16,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:06:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:16,644 INFO L225 Difference]: With dead ends: 1128 [2022-11-16 12:06:16,644 INFO L226 Difference]: Without dead ends: 1128 [2022-11-16 12:06:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:16,645 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:16,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-16 12:06:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1124. [2022-11-16 12:06:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 924 states have (on average 4.665584415584416) internal successors, (4311), 1123 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4311 transitions. [2022-11-16 12:06:16,673 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4311 transitions. Word has length 9 [2022-11-16 12:06:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:16,673 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 4311 transitions. [2022-11-16 12:06:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4311 transitions. [2022-11-16 12:06:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:06:16,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:16,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:16,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-16 12:06:16,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:16,887 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1061965003, now seen corresponding path program 1 times [2022-11-16 12:06:16,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269151021] [2022-11-16 12:06:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:16,889 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:16,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:17,180 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:17,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:17,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:17,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:17,415 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 12:06:17,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:17,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269151021] [2022-11-16 12:06:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269151021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:17,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:17,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127300666] [2022-11-16 12:06:17,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:17,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:17,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:17,417 INFO L87 Difference]: Start difference. First operand 1124 states and 4311 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:17,734 INFO L93 Difference]: Finished difference Result 1131 states and 4325 transitions. [2022-11-16 12:06:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:06:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:17,738 INFO L225 Difference]: With dead ends: 1131 [2022-11-16 12:06:17,738 INFO L226 Difference]: Without dead ends: 1131 [2022-11-16 12:06:17,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:17,739 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:17,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-16 12:06:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1131. [2022-11-16 12:06:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 931 states have (on average 4.645542427497315) internal successors, (4325), 1130 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 4325 transitions. [2022-11-16 12:06:17,787 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 4325 transitions. Word has length 9 [2022-11-16 12:06:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:17,788 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 4325 transitions. [2022-11-16 12:06:17,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 4325 transitions. [2022-11-16 12:06:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:06:17,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:17,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:17,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:18,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1062246917, now seen corresponding path program 1 times [2022-11-16 12:06:18,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:18,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486368835] [2022-11-16 12:06:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:18,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:18,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:18,004 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:18,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:06:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:18,283 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:18,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:18,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:18,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:18,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:18,520 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 12:06:18,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:18,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:18,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486368835] [2022-11-16 12:06:18,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486368835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:18,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:18,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085844835] [2022-11-16 12:06:18,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:18,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:18,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:18,522 INFO L87 Difference]: Start difference. First operand 1131 states and 4325 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:18,890 INFO L93 Difference]: Finished difference Result 1132 states and 4327 transitions. [2022-11-16 12:06:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:18,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:06:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:18,894 INFO L225 Difference]: With dead ends: 1132 [2022-11-16 12:06:18,894 INFO L226 Difference]: Without dead ends: 1132 [2022-11-16 12:06:18,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:18,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:18,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-16 12:06:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1132. [2022-11-16 12:06:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 932 states have (on average 4.6427038626609445) internal successors, (4327), 1131 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 4327 transitions. [2022-11-16 12:06:18,927 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 4327 transitions. Word has length 9 [2022-11-16 12:06:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:18,927 INFO L495 AbstractCegarLoop]: Abstraction has 1132 states and 4327 transitions. [2022-11-16 12:06:18,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 4327 transitions. [2022-11-16 12:06:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:06:18,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:18,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:18,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:19,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:19,141 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:19,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:19,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1062246851, now seen corresponding path program 1 times [2022-11-16 12:06:19,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:19,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753234746] [2022-11-16 12:06:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:19,143 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:19,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:06:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:19,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753234746] [2022-11-16 12:06:19,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753234746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:19,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:19,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:19,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260017826] [2022-11-16 12:06:19,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:19,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:19,408 INFO L87 Difference]: Start difference. First operand 1132 states and 4327 transitions. Second operand has 4 states, 4 states have (on average 2.25) 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 12:06:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:19,934 INFO L93 Difference]: Finished difference Result 1103 states and 3661 transitions. [2022-11-16 12:06:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) 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 12:06:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:19,938 INFO L225 Difference]: With dead ends: 1103 [2022-11-16 12:06:19,938 INFO L226 Difference]: Without dead ends: 1103 [2022-11-16 12:06:19,938 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 12:06:19,939 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:19,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-16 12:06:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 895. [2022-11-16 12:06:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 726 states have (on average 4.425619834710743) internal successors, (3213), 894 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3213 transitions. [2022-11-16 12:06:19,966 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3213 transitions. Word has length 9 [2022-11-16 12:06:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:19,966 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 3213 transitions. [2022-11-16 12:06:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) 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 12:06:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3213 transitions. [2022-11-16 12:06:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:19,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:19,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:19,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:20,179 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash -904891926, now seen corresponding path program 1 times [2022-11-16 12:06:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:20,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724362657] [2022-11-16 12:06:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:20,181 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:20,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:20,514 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:20,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:20,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:20,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:20,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:20,744 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 12:06:20,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:20,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724362657] [2022-11-16 12:06:20,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724362657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:20,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:20,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428310591] [2022-11-16 12:06:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:20,746 INFO L87 Difference]: Start difference. First operand 895 states and 3213 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:21,111 INFO L93 Difference]: Finished difference Result 894 states and 3211 transitions. [2022-11-16 12:06:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:21,115 INFO L225 Difference]: With dead ends: 894 [2022-11-16 12:06:21,115 INFO L226 Difference]: Without dead ends: 894 [2022-11-16 12:06:21,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:21,116 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:21,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-16 12:06:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 891. [2022-11-16 12:06:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 722 states have (on average 4.441828254847645) internal successors, (3207), 890 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3207 transitions. [2022-11-16 12:06:21,150 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3207 transitions. Word has length 10 [2022-11-16 12:06:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:21,150 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 3207 transitions. [2022-11-16 12:06:21,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3207 transitions. [2022-11-16 12:06:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:21,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:21,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:21,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:21,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:21,364 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash -905173840, now seen corresponding path program 1 times [2022-11-16 12:06:21,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:21,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130128521] [2022-11-16 12:06:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:21,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:21,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:21,646 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:21,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:21,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:21,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:21,919 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 12:06:21,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:21,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130128521] [2022-11-16 12:06:21,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130128521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:21,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:21,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:21,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501219497] [2022-11-16 12:06:21,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:21,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:21,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:21,921 INFO L87 Difference]: Start difference. First operand 891 states and 3207 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:22,338 INFO L93 Difference]: Finished difference Result 890 states and 3205 transitions. [2022-11-16 12:06:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:22,342 INFO L225 Difference]: With dead ends: 890 [2022-11-16 12:06:22,342 INFO L226 Difference]: Without dead ends: 890 [2022-11-16 12:06:22,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:22,343 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:22,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 12:06:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-16 12:06:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 885. [2022-11-16 12:06:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 716 states have (on average 4.462290502793296) internal successors, (3195), 884 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3195 transitions. [2022-11-16 12:06:22,370 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3195 transitions. Word has length 10 [2022-11-16 12:06:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:22,371 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 3195 transitions. [2022-11-16 12:06:22,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3195 transitions. [2022-11-16 12:06:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:22,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:22,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:22,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:22,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:22,583 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1438825919, now seen corresponding path program 1 times [2022-11-16 12:06:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678725375] [2022-11-16 12:06:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:22,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:22,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:22,585 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:22,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:06:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:22,829 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:06:22,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:06:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:22,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:22,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:23,078 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 12:06:23,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:23,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:23,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678725375] [2022-11-16 12:06:23,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678725375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:23,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:23,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087545283] [2022-11-16 12:06:23,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:23,080 INFO L87 Difference]: Start difference. First operand 885 states and 3195 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:23,412 INFO L93 Difference]: Finished difference Result 894 states and 3210 transitions. [2022-11-16 12:06:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:23,415 INFO L225 Difference]: With dead ends: 894 [2022-11-16 12:06:23,415 INFO L226 Difference]: Without dead ends: 894 [2022-11-16 12:06:23,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:23,416 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:23,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:06:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-16 12:06:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 894. [2022-11-16 12:06:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 725 states have (on average 4.427586206896552) internal successors, (3210), 893 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3210 transitions. [2022-11-16 12:06:23,433 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3210 transitions. Word has length 10 [2022-11-16 12:06:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:23,434 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 3210 transitions. [2022-11-16 12:06:23,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3210 transitions. [2022-11-16 12:06:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:23,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:23,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:23,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:23,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:23,635 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1430038757, now seen corresponding path program 1 times [2022-11-16 12:06:23,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641631596] [2022-11-16 12:06:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:23,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:23,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:23,637 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:23,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:06:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:23,863 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 12:06:23,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:23,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:23,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641631596] [2022-11-16 12:06:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641631596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:23,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:23,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748333421] [2022-11-16 12:06:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:23,866 INFO L87 Difference]: Start difference. First operand 894 states and 3210 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:24,481 INFO L93 Difference]: Finished difference Result 1193 states and 4226 transitions. [2022-11-16 12:06:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:24,485 INFO L225 Difference]: With dead ends: 1193 [2022-11-16 12:06:24,485 INFO L226 Difference]: Without dead ends: 1193 [2022-11-16 12:06:24,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:24,486 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:24,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:06:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-11-16 12:06:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1047. [2022-11-16 12:06:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 878 states have (on average 4.412300683371298) internal successors, (3874), 1046 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3874 transitions. [2022-11-16 12:06:24,515 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3874 transitions. Word has length 10 [2022-11-16 12:06:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:24,515 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 3874 transitions. [2022-11-16 12:06:24,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3874 transitions. [2022-11-16 12:06:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:24,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:24,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:24,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:24,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:24,717 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1430038845, now seen corresponding path program 1 times [2022-11-16 12:06:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:24,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194416960] [2022-11-16 12:06:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:24,718 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:24,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:24,889 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 12:06:24,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:24,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194416960] [2022-11-16 12:06:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194416960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:24,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:24,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040020117] [2022-11-16 12:06:24,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:24,891 INFO L87 Difference]: Start difference. First operand 1047 states and 3874 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:25,301 INFO L93 Difference]: Finished difference Result 1060 states and 3810 transitions. [2022-11-16 12:06:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:25,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:25,305 INFO L225 Difference]: With dead ends: 1060 [2022-11-16 12:06:25,305 INFO L226 Difference]: Without dead ends: 1060 [2022-11-16 12:06:25,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:25,306 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:25,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:06:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-11-16 12:06:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1025. [2022-11-16 12:06:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 856 states have (on average 4.420560747663552) internal successors, (3784), 1024 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3784 transitions. [2022-11-16 12:06:25,334 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3784 transitions. Word has length 10 [2022-11-16 12:06:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:25,335 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 3784 transitions. [2022-11-16 12:06:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3784 transitions. [2022-11-16 12:06:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:06:25,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:25,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:25,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:25,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:25,557 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:25,558 INFO L85 PathProgramCache]: Analyzing trace with hash -884321460, now seen corresponding path program 1 times [2022-11-16 12:06:25,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:25,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127979386] [2022-11-16 12:06:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:25,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:25,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:25,560 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:25,868 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:06:25,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:06:25,913 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:06:25,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:06:25,935 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:06:25,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:06:25,958 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 12:06:25,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:25,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127979386] [2022-11-16 12:06:25,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127979386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:25,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:25,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532893088] [2022-11-16 12:06:25,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:25,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:25,960 INFO L87 Difference]: Start difference. First operand 1025 states and 3784 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:26,260 INFO L93 Difference]: Finished difference Result 678 states and 2487 transitions. [2022-11-16 12:06:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:06:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:26,262 INFO L225 Difference]: With dead ends: 678 [2022-11-16 12:06:26,262 INFO L226 Difference]: Without dead ends: 678 [2022-11-16 12:06:26,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 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 12:06:26,263 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:26,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:06:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-11-16 12:06:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 678. [2022-11-16 12:06:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 598 states have (on average 4.15886287625418) internal successors, (2487), 677 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2487 transitions. [2022-11-16 12:06:26,276 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2487 transitions. Word has length 11 [2022-11-16 12:06:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:26,276 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 2487 transitions. [2022-11-16 12:06:26,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2487 transitions. [2022-11-16 12:06:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:06:26,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:26,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:26,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:26,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:26,490 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -884321458, now seen corresponding path program 1 times [2022-11-16 12:06:26,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:26,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700398306] [2022-11-16 12:06:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:26,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:26,492 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:26,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:26,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:06:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:26,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:26,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:06:27,028 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:06:27,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:06:27,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:06:27,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:06:27,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:06:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:27,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:06:27,278 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:06:27,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:06:27,378 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 12:06:27,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:35,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700398306] [2022-11-16 12:06:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700398306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:35,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:35,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:06:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001361283] [2022-11-16 12:06:35,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:06:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:06:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:35,152 INFO L87 Difference]: Start difference. First operand 678 states and 2487 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 12:06:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:35,512 INFO L93 Difference]: Finished difference Result 701 states and 2545 transitions. [2022-11-16 12:06:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:35,514 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 12:06:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:35,516 INFO L225 Difference]: With dead ends: 701 [2022-11-16 12:06:35,516 INFO L226 Difference]: Without dead ends: 701 [2022-11-16 12:06:35,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:35,517 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:35,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-11-16 12:06:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-16 12:06:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 686. [2022-11-16 12:06:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 606 states have (on average 4.136963696369637) internal successors, (2507), 685 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2507 transitions. [2022-11-16 12:06:35,531 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2507 transitions. Word has length 11 [2022-11-16 12:06:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:35,531 INFO L495 AbstractCegarLoop]: Abstraction has 686 states and 2507 transitions. [2022-11-16 12:06:35,531 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 12:06:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2507 transitions. [2022-11-16 12:06:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:06:35,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:35,532 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-11-16 12:06:35,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:35,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:35,743 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:06:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:35,743 INFO L85 PathProgramCache]: Analyzing trace with hash 209954184, now seen corresponding path program 1 times [2022-11-16 12:06:35,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:35,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224404668] [2022-11-16 12:06:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:35,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:35,745 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:06:35,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:06:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:06:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:35,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:06:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:38,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:38,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224404668] [2022-11-16 12:06:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224404668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:38,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:38,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 12:06:38,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054601882] [2022-11-16 12:06:38,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:06:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:06:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:06:38,807 INFO L87 Difference]: Start difference. First operand 686 states and 2507 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:46,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:48,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:50,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:52,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:54,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:55,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:06:57,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:04,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:06,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:08,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:10,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:12,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:14,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:16,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:18,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:07:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:27,733 INFO L93 Difference]: Finished difference Result 6738 states and 25985 transitions. [2022-11-16 12:07:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:07:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:07:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:27,753 INFO L225 Difference]: With dead ends: 6738 [2022-11-16 12:07:27,753 INFO L226 Difference]: Without dead ends: 6738 [2022-11-16 12:07:27,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:07:27,754 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1199 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 348 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:27,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 0 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 3236 Invalid, 15 Unknown, 0 Unchecked, 41.3s Time] [2022-11-16 12:07:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2022-11-16 12:07:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 707. [2022-11-16 12:07:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 627 states have (on average 4.062200956937799) internal successors, (2547), 706 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2547 transitions. [2022-11-16 12:07:27,817 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2547 transitions. Word has length 11 [2022-11-16 12:07:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:27,817 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 2547 transitions. [2022-11-16 12:07:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2547 transitions. [2022-11-16 12:07:27,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:07:27,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:27,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:27,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:28,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:28,030 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:07:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2013124010, now seen corresponding path program 1 times [2022-11-16 12:07:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:28,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007742325] [2022-11-16 12:07:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:28,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:28,032 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:07:28,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:28,319 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:07:28,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 12:07:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:28,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:07:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:28,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:07:28,584 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 12:07:28,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:28,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007742325] [2022-11-16 12:07:28,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007742325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:28,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:28,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:07:28,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094231927] [2022-11-16 12:07:28,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:28,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:07:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:28,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:07:28,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:28,586 INFO L87 Difference]: Start difference. First operand 707 states and 2547 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 12:07:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:28,911 INFO L93 Difference]: Finished difference Result 706 states and 2545 transitions. [2022-11-16 12:07:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:28,912 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 12:07:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:28,914 INFO L225 Difference]: With dead ends: 706 [2022-11-16 12:07:28,915 INFO L226 Difference]: Without dead ends: 706 [2022-11-16 12:07:28,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:07:28,915 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:28,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-11-16 12:07:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-11-16 12:07:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 688. [2022-11-16 12:07:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 609 states have (on average 4.129720853858785) internal successors, (2515), 687 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2515 transitions. [2022-11-16 12:07:28,935 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2515 transitions. Word has length 11 [2022-11-16 12:07:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:28,935 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 2515 transitions. [2022-11-16 12:07:28,936 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 12:07:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2515 transitions. [2022-11-16 12:07:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:07:28,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:28,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:28,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-16 12:07:29,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:29,139 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:07:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2071213726, now seen corresponding path program 1 times [2022-11-16 12:07:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57198508] [2022-11-16 12:07:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:29,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:29,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:29,141 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:07:29,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:07:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:29,599 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:29,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:07:29,757 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:07:29,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:07:29,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:07:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:07:29,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:30,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:30,069 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:07:30,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:07:30,174 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 12:07:30,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:37,225 WARN L233 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:07:40,639 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 12:07:40,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:40,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57198508] [2022-11-16 12:07:40,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57198508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:40,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:40,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:07:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689836866] [2022-11-16 12:07:40,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:07:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:07:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:40,641 INFO L87 Difference]: Start difference. First operand 688 states and 2515 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:40,991 INFO L93 Difference]: Finished difference Result 752 states and 2661 transitions. [2022-11-16 12:07:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:40,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:07:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:40,994 INFO L225 Difference]: With dead ends: 752 [2022-11-16 12:07:40,995 INFO L226 Difference]: Without dead ends: 752 [2022-11-16 12:07:40,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:40,995 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-11-16 12:07:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-16 12:07:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 706. [2022-11-16 12:07:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 627 states have (on average 4.0701754385964914) internal successors, (2552), 705 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2552 transitions. [2022-11-16 12:07:41,013 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2552 transitions. Word has length 12 [2022-11-16 12:07:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:41,014 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 2552 transitions. [2022-11-16 12:07:41,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2552 transitions. [2022-11-16 12:07:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:07:41,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:41,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:41,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:41,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:41,227 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:07:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1021353141, now seen corresponding path program 1 times [2022-11-16 12:07:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093701332] [2022-11-16 12:07:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:41,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:41,229 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:07:41,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:07:41,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:41,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:41,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:07:41,869 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:07:41,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:07:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:42,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:42,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:07:42,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:07:42,167 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:07:42,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 12:07:42,574 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 12:07:42,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:45,545 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 12:07:45,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093701332] [2022-11-16 12:07:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093701332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:45,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:45,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-16 12:07:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854747906] [2022-11-16 12:07:45,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:07:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:07:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:45,547 INFO L87 Difference]: Start difference. First operand 706 states and 2552 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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 12:07:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:46,131 INFO L93 Difference]: Finished difference Result 974 states and 3495 transitions. [2022-11-16 12:07:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:07:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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 12:07:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:46,136 INFO L225 Difference]: With dead ends: 974 [2022-11-16 12:07:46,136 INFO L226 Difference]: Without dead ends: 974 [2022-11-16 12:07:46,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:46,137 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 286 Unchecked, 0.6s Time] [2022-11-16 12:07:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-11-16 12:07:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 710. [2022-11-16 12:07:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 631 states have (on average 4.057052297939778) internal successors, (2560), 709 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2560 transitions. [2022-11-16 12:07:46,157 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2560 transitions. Word has length 12 [2022-11-16 12:07:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:46,157 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 2560 transitions. [2022-11-16 12:07:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 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 12:07:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2560 transitions. [2022-11-16 12:07:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:07:46,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:46,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:46,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:46,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:46,363 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:07:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1371804644, now seen corresponding path program 1 times [2022-11-16 12:07:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:46,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1926195210] [2022-11-16 12:07:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:46,364 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 12:07:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:46,365 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:07:46,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:07:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:07:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:46,822 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:46,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:07:47,026 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:07:47,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:07:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:47,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:47,216 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:07:47,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:07:47,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:47,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:47,289 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:07:47,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:07:47,443 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 12:07:47,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:56,844 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:00,232 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 12:08:00,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:00,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1926195210] [2022-11-16 12:08:00,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1926195210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:00,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:00,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:08:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315175777] [2022-11-16 12:08:00,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:08:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:08:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:00,233 INFO L87 Difference]: Start difference. First operand 710 states and 2560 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:00,630 INFO L93 Difference]: Finished difference Result 745 states and 2642 transitions. [2022-11-16 12:08:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:08:00,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:08:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:00,633 INFO L225 Difference]: With dead ends: 745 [2022-11-16 12:08:00,633 INFO L226 Difference]: Without dead ends: 745 [2022-11-16 12:08:00,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:00,633 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:00,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-11-16 12:08:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-16 12:08:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 722. [2022-11-16 12:08:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 643 states have (on average 4.024883359253499) internal successors, (2588), 721 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2588 transitions. [2022-11-16 12:08:00,649 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2588 transitions. Word has length 12 [2022-11-16 12:08:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:00,650 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 2588 transitions. [2022-11-16 12:08:00,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2588 transitions. [2022-11-16 12:08:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:08:00,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:00,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:00,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:00,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:00,864 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1642723998, now seen corresponding path program 1 times [2022-11-16 12:08:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437130824] [2022-11-16 12:08:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:00,865 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:00,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:08:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:01,290 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:01,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:08:01,462 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:08:01,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:08:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:01,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:08:01,667 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:08:01,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:08:01,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:01,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:08:01,735 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:08:01,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:08:01,879 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 12:08:01,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:14,344 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 12:08:14,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:14,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437130824] [2022-11-16 12:08:14,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437130824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:14,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:14,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:08:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159205356] [2022-11-16 12:08:14,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:08:14,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:08:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:14,346 INFO L87 Difference]: Start difference. First operand 722 states and 2588 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:14,737 INFO L93 Difference]: Finished difference Result 744 states and 2646 transitions. [2022-11-16 12:08:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:08:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:08:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:14,740 INFO L225 Difference]: With dead ends: 744 [2022-11-16 12:08:14,740 INFO L226 Difference]: Without dead ends: 744 [2022-11-16 12:08:14,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:14,741 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2022-11-16 12:08:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-16 12:08:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 725. [2022-11-16 12:08:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 646 states have (on average 4.018575851393189) internal successors, (2596), 724 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2596 transitions. [2022-11-16 12:08:14,754 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2596 transitions. Word has length 12 [2022-11-16 12:08:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:14,754 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 2596 transitions. [2022-11-16 12:08:14,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2596 transitions. [2022-11-16 12:08:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:08:14,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:14,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:14,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:14,955 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1644160600, now seen corresponding path program 1 times [2022-11-16 12:08:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:14,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744652596] [2022-11-16 12:08:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:14,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:14,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:14,957 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:08:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:15,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:15,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:08:15,555 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:08:15,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 12:08:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:15,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:08:15,757 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:08:15,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:08:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:15,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:08:15,833 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:08:15,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:08:15,978 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 12:08:15,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:30,105 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:30,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744652596] [2022-11-16 12:08:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744652596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:08:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211789597] [2022-11-16 12:08:30,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:30,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:08:30,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:08:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:30,108 INFO L87 Difference]: Start difference. First operand 725 states and 2596 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:30,344 INFO L93 Difference]: Finished difference Result 741 states and 2642 transitions. [2022-11-16 12:08:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:08:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:08:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:30,346 INFO L225 Difference]: With dead ends: 741 [2022-11-16 12:08:30,347 INFO L226 Difference]: Without dead ends: 741 [2022-11-16 12:08:30,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:30,347 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-11-16 12:08:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-16 12:08:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 726. [2022-11-16 12:08:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 647 states have (on average 4.01854714064915) internal successors, (2600), 725 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2600 transitions. [2022-11-16 12:08:30,360 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2600 transitions. Word has length 12 [2022-11-16 12:08:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:30,360 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 2600 transitions. [2022-11-16 12:08:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2600 transitions. [2022-11-16 12:08:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:08:30,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:30,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:30,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-16 12:08:30,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:30,561 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:30,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1644157035, now seen corresponding path program 1 times [2022-11-16 12:08:30,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:30,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914275754] [2022-11-16 12:08:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:30,562 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 12:08:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:30,563 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:30,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:08:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:30,815 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 12:08:30,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:30,882 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 12:08:30,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:30,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914275754] [2022-11-16 12:08:30,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914275754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:30,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:30,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:08:30,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959103239] [2022-11-16 12:08:30,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:30,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:08:30,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:08:30,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:08:30,884 INFO L87 Difference]: Start difference. First operand 726 states and 2600 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 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 12:08:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:31,482 INFO L93 Difference]: Finished difference Result 997 states and 3635 transitions. [2022-11-16 12:08:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:08:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 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 12:08:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:31,486 INFO L225 Difference]: With dead ends: 997 [2022-11-16 12:08:31,486 INFO L226 Difference]: Without dead ends: 997 [2022-11-16 12:08:31,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:08:31,486 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:31,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:08:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-16 12:08:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 871. [2022-11-16 12:08:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 792 states have (on average 4.109848484848484) internal successors, (3255), 870 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3255 transitions. [2022-11-16 12:08:31,500 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3255 transitions. Word has length 12 [2022-11-16 12:08:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:31,501 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 3255 transitions. [2022-11-16 12:08:31,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 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 12:08:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3255 transitions. [2022-11-16 12:08:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:08:31,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:31,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:31,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-16 12:08:31,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:31,702 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1644157029, now seen corresponding path program 1 times [2022-11-16 12:08:31,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:31,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946044326] [2022-11-16 12:08:31,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:31,704 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:08:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:32,261 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 7 treesize of output 5 [2022-11-16 12:08:32,309 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 12:08:32,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:32,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:32,494 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 155 treesize of output 120 [2022-11-16 12:08:32,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:32,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 127 [2022-11-16 12:08:32,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:32,603 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 140 treesize of output 142 [2022-11-16 12:08:35,048 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 12:08:35,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:35,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946044326] [2022-11-16 12:08:35,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946044326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:35,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:35,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:08:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848039652] [2022-11-16 12:08:35,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:35,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:08:35,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:35,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:08:35,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:35,050 INFO L87 Difference]: Start difference. First operand 871 states and 3255 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:42,877 INFO L93 Difference]: Finished difference Result 1296 states and 4321 transitions. [2022-11-16 12:08:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:08:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:08:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:42,882 INFO L225 Difference]: With dead ends: 1296 [2022-11-16 12:08:42,882 INFO L226 Difference]: Without dead ends: 1296 [2022-11-16 12:08:42,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:08:42,882 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:42,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 12:08:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-11-16 12:08:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 928. [2022-11-16 12:08:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 849 states have (on average 4.028268551236749) internal successors, (3420), 927 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3420 transitions. [2022-11-16 12:08:42,907 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3420 transitions. Word has length 12 [2022-11-16 12:08:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:42,908 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 3420 transitions. [2022-11-16 12:08:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3420 transitions. [2022-11-16 12:08:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:08:42,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:42,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:42,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:43,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:43,122 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash -122146136, now seen corresponding path program 1 times [2022-11-16 12:08:43,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723383018] [2022-11-16 12:08:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:43,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:43,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:43,124 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:43,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:08:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:43,540 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 12:08:43,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:43,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723383018] [2022-11-16 12:08:43,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723383018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:43,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:43,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:08:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411341358] [2022-11-16 12:08:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:08:43,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:08:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:08:43,541 INFO L87 Difference]: Start difference. First operand 928 states and 3420 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:44,149 INFO L93 Difference]: Finished difference Result 975 states and 3502 transitions. [2022-11-16 12:08:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:08:44,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:08:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:44,152 INFO L225 Difference]: With dead ends: 975 [2022-11-16 12:08:44,152 INFO L226 Difference]: Without dead ends: 975 [2022-11-16 12:08:44,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:08:44,153 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:44,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:08:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-16 12:08:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 956. [2022-11-16 12:08:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 877 states have (on average 3.966932725199544) internal successors, (3479), 955 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3479 transitions. [2022-11-16 12:08:44,177 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3479 transitions. Word has length 12 [2022-11-16 12:08:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:44,177 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 3479 transitions. [2022-11-16 12:08:44,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3479 transitions. [2022-11-16 12:08:44,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:08:44,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:44,178 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-16 12:08:44,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:44,392 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:08:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 715986917, now seen corresponding path program 3 times [2022-11-16 12:08:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:08:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865005036] [2022-11-16 12:08:44,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:08:44,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:08:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:08:44,393 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:08:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:08:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 12:08:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:08:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:44,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:08:44,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:08:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:45,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:50,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:08:50,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865005036] [2022-11-16 12:08:50,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865005036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:50,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:50,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 12:08:50,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689893279] [2022-11-16 12:08:50,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:50,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:08:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:08:50,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:08:50,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:08:50,489 INFO L87 Difference]: Start difference. First operand 956 states and 3479 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:10,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:12,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:14,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:16,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:18,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:20,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:22,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:24,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:26,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:28,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:30,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:36,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:38,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:40,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:42,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:44,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:46,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:48,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:50,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:52,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:54,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:09:56,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:10:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:12,891 INFO L93 Difference]: Finished difference Result 9278 states and 34700 transitions. [2022-11-16 12:10:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:10:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:10:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:12,919 INFO L225 Difference]: With dead ends: 9278 [2022-11-16 12:10:12,920 INFO L226 Difference]: Without dead ends: 9278 [2022-11-16 12:10:12,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:10:12,920 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 206 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:12,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2129 Valid, 0 Invalid, 5702 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [206 Valid, 5475 Invalid, 21 Unknown, 0 Unchecked, 60.7s Time] [2022-11-16 12:10:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2022-11-16 12:10:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 978. [2022-11-16 12:10:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 899 states have (on average 3.9187986651835374) internal successors, (3523), 977 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3523 transitions. [2022-11-16 12:10:13,036 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3523 transitions. Word has length 13 [2022-11-16 12:10:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:13,037 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 3523 transitions. [2022-11-16 12:10:13,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3523 transitions. [2022-11-16 12:10:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:10:13,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:13,038 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:13,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:10:13,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:13,251 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:10:13,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1077846638, now seen corresponding path program 2 times [2022-11-16 12:10:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:13,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171279331] [2022-11-16 12:10:13,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:13,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:13,253 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:10:13,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:10:13,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:13,678 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:13,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (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 12:10:13,851 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:10:13,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 12:10:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:10:13,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:10:14,017 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 12:10:14,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 12:10:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:10:14,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:10:14,076 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:10:14,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:10:14,177 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 12:10:14,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:14,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:14,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171279331] [2022-11-16 12:10:14,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171279331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:14,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:14,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:10:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039861623] [2022-11-16 12:10:14,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:10:14,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:10:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:14,179 INFO L87 Difference]: Start difference. First operand 978 states and 3523 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 12:10:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:14,629 INFO L93 Difference]: Finished difference Result 707 states and 2467 transitions. [2022-11-16 12:10:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:10:14,630 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 13 [2022-11-16 12:10:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:14,631 INFO L225 Difference]: With dead ends: 707 [2022-11-16 12:10:14,631 INFO L226 Difference]: Without dead ends: 707 [2022-11-16 12:10:14,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:14,632 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:14,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:10:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-16 12:10:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 368. [2022-11-16 12:10:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 338 states have (on average 3.1775147928994083) internal successors, (1074), 367 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1074 transitions. [2022-11-16 12:10:14,656 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1074 transitions. Word has length 13 [2022-11-16 12:10:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:14,657 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 1074 transitions. [2022-11-16 12:10:14,657 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 12:10:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1074 transitions. [2022-11-16 12:10:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:10:14,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:14,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:14,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:14,859 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:10:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 570744655, now seen corresponding path program 1 times [2022-11-16 12:10:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:14,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669657116] [2022-11-16 12:10:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:14,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:14,861 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:10:14,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:10:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:10:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:15,230 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 12:10:15,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:15,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:15,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669657116] [2022-11-16 12:10:15,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669657116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:15,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:15,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:10:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750958830] [2022-11-16 12:10:15,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:15,232 INFO L87 Difference]: Start difference. First operand 368 states and 1074 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:15,752 INFO L93 Difference]: Finished difference Result 561 states and 1669 transitions. [2022-11-16 12:10:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:15,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:10:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:15,754 INFO L225 Difference]: With dead ends: 561 [2022-11-16 12:10:15,754 INFO L226 Difference]: Without dead ends: 561 [2022-11-16 12:10:15,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:15,755 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:15,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:10:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-16 12:10:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 451. [2022-11-16 12:10:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 421 states have (on average 3.4299287410926365) internal successors, (1444), 450 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1444 transitions. [2022-11-16 12:10:15,763 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1444 transitions. Word has length 13 [2022-11-16 12:10:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:15,764 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 1444 transitions. [2022-11-16 12:10:15,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1444 transitions. [2022-11-16 12:10:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:10:15,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:15,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:15,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:15,971 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:10:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash 570744715, now seen corresponding path program 1 times [2022-11-16 12:10:15,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148582202] [2022-11-16 12:10:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:15,972 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 12:10:15,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:15,976 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:10:15,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:10:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:10:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:16,722 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 12:10:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:37,014 WARN L233 SmtUtils]: Spent 17.70s on a formula simplification. DAG size of input: 402 DAG size of output: 354 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:10:37,017 INFO L321 Elim1Store]: treesize reduction 168, result has 90.7 percent of original size [2022-11-16 12:10:37,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 747 treesize of output 2176 [2022-11-16 12:10:37,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:10:37,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 536 treesize of output 554 [2022-11-16 12:10:38,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:10:38,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 524 treesize of output 536 [2022-11-16 12:13:18,311 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 12:13:18,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148582202] [2022-11-16 12:13:18,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148582202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:18,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:18,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:13:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128354552] [2022-11-16 12:13:18,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:18,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:13:18,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:13:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:13:18,312 INFO L87 Difference]: Start difference. First operand 451 states and 1444 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:20,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:13:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:25,074 INFO L93 Difference]: Finished difference Result 1055 states and 3550 transitions. [2022-11-16 12:13:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:13:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:13:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:25,078 INFO L225 Difference]: With dead ends: 1055 [2022-11-16 12:13:25,078 INFO L226 Difference]: Without dead ends: 1055 [2022-11-16 12:13:25,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:13:25,079 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 215 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:25,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 0 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 335 Invalid, 1 Unknown, 27 Unchecked, 4.9s Time] [2022-11-16 12:13:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-16 12:13:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 543. [2022-11-16 12:13:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 513 states have (on average 3.943469785575049) internal successors, (2023), 542 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 2023 transitions. [2022-11-16 12:13:25,090 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 2023 transitions. Word has length 13 [2022-11-16 12:13:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:25,090 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 2023 transitions. [2022-11-16 12:13:25,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 2023 transitions. [2022-11-16 12:13:25,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:13:25,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:25,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:25,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-16 12:13:25,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:25,292 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:13:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 570744701, now seen corresponding path program 1 times [2022-11-16 12:13:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:25,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700118227] [2022-11-16 12:13:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:25,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:25,293 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:13:25,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:13:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:13:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:25,642 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 12:13:25,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:25,710 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 12:13:25,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:25,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700118227] [2022-11-16 12:13:25,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700118227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:25,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:25,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:13:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474990746] [2022-11-16 12:13:25,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:13:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:13:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:13:25,712 INFO L87 Difference]: Start difference. First operand 543 states and 2023 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 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 12:13:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:26,449 INFO L93 Difference]: Finished difference Result 760 states and 2720 transitions. [2022-11-16 12:13:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:26,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 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 12:13:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:26,451 INFO L225 Difference]: With dead ends: 760 [2022-11-16 12:13:26,452 INFO L226 Difference]: Without dead ends: 760 [2022-11-16 12:13:26,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:13:26,452 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:26,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:13:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-11-16 12:13:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 607. [2022-11-16 12:13:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 577 states have (on average 3.97053726169844) internal successors, (2291), 606 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 2291 transitions. [2022-11-16 12:13:26,466 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 2291 transitions. Word has length 13 [2022-11-16 12:13:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:26,466 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 2291 transitions. [2022-11-16 12:13:26,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 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 12:13:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 2291 transitions. [2022-11-16 12:13:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:13:26,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:26,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:26,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 12:13:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:26,667 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:13:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2027283468, now seen corresponding path program 1 times [2022-11-16 12:13:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519800740] [2022-11-16 12:13:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:26,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:26,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:26,670 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:13:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:13:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:13:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:27,342 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 12:13:27,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:31,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:31,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 851 treesize of output 1520 [2022-11-16 12:13:31,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:31,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 571 treesize of output 594 [2022-11-16 12:13:32,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:32,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 563 treesize of output 580 [2022-11-16 12:13:56,844 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 12:13:56,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:56,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519800740] [2022-11-16 12:13:56,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519800740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:56,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:56,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063369735] [2022-11-16 12:13:56,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:56,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:56,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:56,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:56,846 INFO L87 Difference]: Start difference. First operand 607 states and 2291 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:59,480 INFO L93 Difference]: Finished difference Result 874 states and 2960 transitions. [2022-11-16 12:13:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:13:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:13:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:59,483 INFO L225 Difference]: With dead ends: 874 [2022-11-16 12:13:59,484 INFO L226 Difference]: Without dead ends: 874 [2022-11-16 12:13:59,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:13:59,484 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 296 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:59,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 0 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:13:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-16 12:13:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 599. [2022-11-16 12:13:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 569 states have (on average 3.92091388400703) internal successors, (2231), 598 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2231 transitions. [2022-11-16 12:13:59,493 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2231 transitions. Word has length 14 [2022-11-16 12:13:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:59,493 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 2231 transitions. [2022-11-16 12:13:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2231 transitions. [2022-11-16 12:13:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:13:59,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:59,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:59,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:13:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:59,695 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:13:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2027283518, now seen corresponding path program 1 times [2022-11-16 12:13:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:59,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018592285] [2022-11-16 12:13:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:59,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:59,696 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:13:59,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:14:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:14:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:00,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:14:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:14:00,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:14:02,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:14:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018592285] [2022-11-16 12:14:02,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018592285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:02,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:14:02,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 12:14:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191471530] [2022-11-16 12:14:02,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:02,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:14:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:14:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:14:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:02,004 INFO L87 Difference]: Start difference. First operand 599 states and 2231 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 12:14:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:03,873 INFO L93 Difference]: Finished difference Result 663 states and 2591 transitions. [2022-11-16 12:14:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:14:03,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 14 [2022-11-16 12:14:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:03,876 INFO L225 Difference]: With dead ends: 663 [2022-11-16 12:14:03,876 INFO L226 Difference]: Without dead ends: 663 [2022-11-16 12:14:03,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:14:03,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:03,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-11-16 12:14:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-11-16 12:14:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 639. [2022-11-16 12:14:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 609 states have (on average 4.064039408866995) internal successors, (2475), 638 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2475 transitions. [2022-11-16 12:14:03,889 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2475 transitions. Word has length 14 [2022-11-16 12:14:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:03,889 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2475 transitions. [2022-11-16 12:14:03,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 12:14:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2475 transitions. [2022-11-16 12:14:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:14:03,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:03,891 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:03,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:14:04,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:14:04,091 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:14:04,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash 513219563, now seen corresponding path program 2 times [2022-11-16 12:14:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:14:04,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514721326] [2022-11-16 12:14:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:14:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:14:04,093 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:14:04,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:14:04,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:14:04,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:14:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:14:04,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:04,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:14:04,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514721326] [2022-11-16 12:14:04,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514721326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:04,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:04,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:04,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265220442] [2022-11-16 12:14:04,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:04,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:04,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:14:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:04,398 INFO L87 Difference]: Start difference. First operand 639 states and 2475 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:04,890 INFO L93 Difference]: Finished difference Result 1042 states and 4126 transitions. [2022-11-16 12:14:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:14:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:14:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:04,894 INFO L225 Difference]: With dead ends: 1042 [2022-11-16 12:14:04,894 INFO L226 Difference]: Without dead ends: 1042 [2022-11-16 12:14:04,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:04,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:04,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:14:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-16 12:14:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 729. [2022-11-16 12:14:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 699 states have (on average 4.030042918454936) internal successors, (2817), 728 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2817 transitions. [2022-11-16 12:14:04,911 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2817 transitions. Word has length 14 [2022-11-16 12:14:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:04,911 INFO L495 AbstractCegarLoop]: Abstraction has 729 states and 2817 transitions. [2022-11-16 12:14:04,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2817 transitions. [2022-11-16 12:14:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:14:04,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:04,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:04,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:14:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:14:05,113 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-16 12:14:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2032318107, now seen corresponding path program 1 times [2022-11-16 12:14:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:14:05,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236572745] [2022-11-16 12:14:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:05,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:14:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:14:05,115 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:14:05,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdde0892-a8e1-4545-a08d-e5cccb416a32/bin/uautomizer-tPACEb0tL8/mathsat -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 12:14:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:14:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:14:07,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:28,797 WARN L233 SmtUtils]: Spent 15.02s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:15:12,700 WARN L233 SmtUtils]: Spent 43.66s on a formula simplification. DAG size of input: 641 DAG size of output: 593 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:15:12,704 INFO L321 Elim1Store]: treesize reduction 168, result has 94.5 percent of original size [2022-11-16 12:15:12,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 1010 treesize of output 3637 [2022-11-16 12:15:13,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:13,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 729 treesize of output 769 [2022-11-16 12:15:14,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:14,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 709 treesize of output 737