./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:30:06,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:30:06,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:30:06,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:30:06,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:30:06,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:30:06,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:30:06,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:30:06,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:30:06,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:30:06,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:30:06,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:30:06,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:30:06,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:30:06,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:30:06,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:30:06,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:30:06,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:30:06,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:30:06,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:30:06,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:30:06,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:30:06,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:30:06,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:30:06,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:30:06,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:30:06,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:30:06,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:30:06,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:30:06,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:30:06,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:30:06,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:30:06,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:30:06,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:30:06,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:30:06,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:30:06,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:30:06,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:30:06,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:30:06,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:30:06,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:30:06,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 09:30:06,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:30:06,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:30:06,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:30:06,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:30:06,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:30:06,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:30:06,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:30:06,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:30:06,891 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:30:06,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:30:06,892 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:30:06,893 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:30:06,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:30:06,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:30:06,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:30:06,893 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:30:06,894 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:30:06,894 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:30:06,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:30:06,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:30:06,895 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:30:06,895 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:30:06,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:30:06,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:30:06,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:30:06,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:30:06,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:30:06,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:30:06,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:30:06,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:30:06,898 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_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-20 09:30:07,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:30:07,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:30:07,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:30:07,292 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:30:07,292 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:30:07,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-20 09:30:10,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:30:10,526 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:30:10,527 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-20 09:30:10,534 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/7d57e77f7/f6cd8e2784614434854b3bdcaf6cc402/FLAG759c9c1ff [2022-11-20 09:30:10,553 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/7d57e77f7/f6cd8e2784614434854b3bdcaf6cc402 [2022-11-20 09:30:10,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:30:10,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:30:10,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:10,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:30:10,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:30:10,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:10" (1/1) ... [2022-11-20 09:30:10,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e66937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:10, skipping insertion in model container [2022-11-20 09:30:10,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:10" (1/1) ... [2022-11-20 09:30:10,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:30:10,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:30:10,787 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-20 09:30:10,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:10,809 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 09:30:10,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24db9428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:10, skipping insertion in model container [2022-11-20 09:30:10,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:10,811 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 09:30:10,813 INFO L158 Benchmark]: Toolchain (without parser) took 251.52ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 102.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:30:10,813 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 144.7MB. Free memory is still 116.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:30:10,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.59ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 102.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:30:10,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 144.7MB. Free memory is still 116.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.59ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 102.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: 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_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:30:13,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:30:13,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:30:13,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:30:13,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:30:13,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:30:13,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:30:13,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:30:13,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:30:13,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:30:13,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:30:13,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:30:13,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:30:13,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:30:13,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:30:13,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:30:13,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:30:13,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:30:13,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:30:13,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:30:13,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:30:13,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:30:13,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:30:13,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:30:13,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:30:13,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:30:13,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:30:13,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:30:13,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:30:13,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:30:13,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:30:13,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:30:13,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:30:13,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:30:13,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:30:13,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:30:13,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:30:13,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:30:13,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:30:13,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:30:13,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:30:13,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 09:30:13,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:30:13,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:30:13,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:30:13,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:30:13,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:30:13,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:30:13,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:30:13,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:30:13,416 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:30:13,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:30:13,418 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:30:13,418 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:30:13,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:30:13,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:30:13,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:30:13,419 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:30:13,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:30:13,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:30:13,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:30:13,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:30:13,421 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 09:30:13,421 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 09:30:13,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:30:13,422 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:30:13,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:30:13,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:30:13,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:30:13,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:30:13,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:30:13,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:30:13,424 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 09:30:13,424 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 09:30:13,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 09:30:13,425 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_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-11-20 09:30:13,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:30:13,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:30:13,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:30:13,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:30:13,879 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:30:13,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-20 09:30:17,233 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:30:17,425 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:30:17,426 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-11-20 09:30:17,433 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/2e894b6f6/59d9cdafc834405db145ca9c1c44d9aa/FLAG1088dd99e [2022-11-20 09:30:17,453 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/data/2e894b6f6/59d9cdafc834405db145ca9c1c44d9aa [2022-11-20 09:30:17,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:30:17,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:30:17,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:17,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:30:17,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:30:17,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bc44ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17, skipping insertion in model container [2022-11-20 09:30:17,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:30:17,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:30:17,685 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-20 09:30:17,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:17,710 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 09:30:17,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:30:17,729 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-20 09:30:17,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:17,739 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:30:17,774 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-11-20 09:30:17,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:30:17,820 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:30:17,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17 WrapperNode [2022-11-20 09:30:17,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:30:17,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:30:17,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:30:17,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:30:17,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,892 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-20 09:30:17,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:30:17,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:30:17,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:30:17,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:30:17,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,945 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:30:17,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:30:17,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:30:17,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:30:17,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (1/1) ... [2022-11-20 09:30:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:30:17,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:17,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:30:18,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:30:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:30:18,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 09:30:18,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:30:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 09:30:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:30:18,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:30:18,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:30:18,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:30:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:30:18,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:30:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:30:18,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:30:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:30:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:30:18,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:30:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:30:18,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 09:30:18,056 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:30:18,214 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:30:18,216 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:30:18,811 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:30:18,972 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:30:18,972 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 09:30:18,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:30:18 BoogieIcfgContainer [2022-11-20 09:30:18,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:30:18,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:30:18,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:30:18,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:30:18,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:30:17" (1/3) ... [2022-11-20 09:30:18,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288ab45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:30:18, skipping insertion in model container [2022-11-20 09:30:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:30:17" (2/3) ... [2022-11-20 09:30:18,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2288ab45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:30:18, skipping insertion in model container [2022-11-20 09:30:18,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:30:18" (3/3) ... [2022-11-20 09:30:18,990 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2022-11-20 09:30:19,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:30:19,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-20 09:30:19,010 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:30:19,112 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 09:30:19,167 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 09:30:19,181 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-20 09:30:19,184 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 177 transitions, 378 flow [2022-11-20 09:30:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 177 transitions, 378 flow [2022-11-20 09:30:19,292 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-11-20 09:30:19,292 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:30:19,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 10/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 174 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-20 09:30:19,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2022-11-20 09:30:47,151 INFO L134 LiptonReduction]: Checked pairs total: 2788 [2022-11-20 09:30:47,152 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-20 09:30:47,159 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2022-11-20 09:30:47,232 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:47,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:30:47,259 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;@53a14915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:30:47,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-20 09:30:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:30:47,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:47,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:30:47,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 22077, now seen corresponding path program 1 times [2022-11-20 09:30:47,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:47,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130615552] [2022-11-20 09:30:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:47,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:47,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:47,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 09:30:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:47,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 09:30:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:47,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:47,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130615552] [2022-11-20 09:30:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130615552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:47,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079911557] [2022-11-20 09:30:47,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:47,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:30:47,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:30:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:30:47,439 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 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 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:47,718 INFO L93 Difference]: Finished difference Result 379 states and 1114 transitions. [2022-11-20 09:30:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:30:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:30:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:47,739 INFO L225 Difference]: With dead ends: 379 [2022-11-20 09:30:47,739 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 09:30:47,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:30:47,743 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:47,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 09:30:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-20 09:30:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 314 states have (on average 3.5477707006369426) internal successors, (1114), 378 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1114 transitions. [2022-11-20 09:30:47,893 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1114 transitions. Word has length 2 [2022-11-20 09:30:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:47,894 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1114 transitions. [2022-11-20 09:30:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1114 transitions. [2022-11-20 09:30:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:30:47,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:47,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:30:47,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:48,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash 22078, now seen corresponding path program 1 times [2022-11-20 09:30:48,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506759542] [2022-11-20 09:30:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:48,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:48,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:48,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:48,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 09:30:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:30:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:48,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:48,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506759542] [2022-11-20 09:30:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506759542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:48,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:48,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:48,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518968950] [2022-11-20 09:30:48,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:48,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:48,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:48,337 INFO L87 Difference]: Start difference. First operand 379 states and 1114 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:48,644 INFO L93 Difference]: Finished difference Result 382 states and 1117 transitions. [2022-11-20 09:30:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:30:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:48,649 INFO L225 Difference]: With dead ends: 382 [2022-11-20 09:30:48,649 INFO L226 Difference]: Without dead ends: 382 [2022-11-20 09:30:48,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:48,651 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:48,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:30:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-20 09:30:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2022-11-20 09:30:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 315 states have (on average 3.546031746031746) internal successors, (1117), 379 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1117 transitions. [2022-11-20 09:30:48,686 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1117 transitions. Word has length 2 [2022-11-20 09:30:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:48,686 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1117 transitions. [2022-11-20 09:30:48,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1117 transitions. [2022-11-20 09:30:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:30:48,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:48,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:30:48,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:48,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 21952, now seen corresponding path program 1 times [2022-11-20 09:30:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:48,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271092134] [2022-11-20 09:30:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:48,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:48,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 09:30:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:30:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:49,102 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:30:49,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:30:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:49,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:49,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:49,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271092134] [2022-11-20 09:30:49,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271092134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:49,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:49,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:49,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734625813] [2022-11-20 09:30:49,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:49,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:49,151 INFO L87 Difference]: Start difference. First operand 380 states and 1117 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:49,373 INFO L93 Difference]: Finished difference Result 378 states and 1114 transitions. [2022-11-20 09:30:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:30:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:49,377 INFO L225 Difference]: With dead ends: 378 [2022-11-20 09:30:49,384 INFO L226 Difference]: Without dead ends: 378 [2022-11-20 09:30:49,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:49,385 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:49,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-20 09:30:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-20 09:30:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.5365079365079364) internal successors, (1114), 377 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1114 transitions. [2022-11-20 09:30:49,417 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1114 transitions. Word has length 2 [2022-11-20 09:30:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:49,418 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1114 transitions. [2022-11-20 09:30:49,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1114 transitions. [2022-11-20 09:30:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:30:49,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:49,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:30:49,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:49,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:49,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:49,632 INFO L85 PathProgramCache]: Analyzing trace with hash 21953, now seen corresponding path program 1 times [2022-11-20 09:30:49,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:49,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595505938] [2022-11-20 09:30:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:49,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 09:30:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:30:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:49,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:49,873 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 [2022-11-20 09:30:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:49,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:49,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595505938] [2022-11-20 09:30:49,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595505938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:49,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:49,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:49,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629169758] [2022-11-20 09:30:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:49,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:49,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:49,915 INFO L87 Difference]: Start difference. First operand 378 states and 1114 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:50,151 INFO L93 Difference]: Finished difference Result 378 states and 1113 transitions. [2022-11-20 09:30:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:30:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:50,155 INFO L225 Difference]: With dead ends: 378 [2022-11-20 09:30:50,155 INFO L226 Difference]: Without dead ends: 378 [2022-11-20 09:30:50,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:50,156 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:50,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-20 09:30:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-20 09:30:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.533333333333333) internal successors, (1113), 377 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1113 transitions. [2022-11-20 09:30:50,175 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1113 transitions. Word has length 2 [2022-11-20 09:30:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:50,176 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1113 transitions. [2022-11-20 09:30:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1113 transitions. [2022-11-20 09:30:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:30:50,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:50,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:30:50,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:50,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:50,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash 684517, now seen corresponding path program 1 times [2022-11-20 09:30:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:50,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129525320] [2022-11-20 09:30:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:50,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:50,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:50,392 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:50,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 09:30:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:30:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:50,606 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 09:30:50,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 09:30:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:50,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:50,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129525320] [2022-11-20 09:30:50,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129525320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:50,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:50,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:50,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713220271] [2022-11-20 09:30:50,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:50,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:50,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:50,752 INFO L87 Difference]: Start difference. First operand 378 states and 1113 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:50,882 INFO L93 Difference]: Finished difference Result 377 states and 1112 transitions. [2022-11-20 09:30:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:30:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:50,885 INFO L225 Difference]: With dead ends: 377 [2022-11-20 09:30:50,885 INFO L226 Difference]: Without dead ends: 377 [2022-11-20 09:30:50,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:50,886 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:50,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-20 09:30:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-20 09:30:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-11-20 09:30:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 315 states have (on average 3.53015873015873) internal successors, (1112), 376 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1112 transitions. [2022-11-20 09:30:50,901 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1112 transitions. Word has length 3 [2022-11-20 09:30:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:50,901 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 1112 transitions. [2022-11-20 09:30:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1112 transitions. [2022-11-20 09:30:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:30:50,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:50,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:30:50,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:51,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 684519, now seen corresponding path program 1 times [2022-11-20 09:30:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:51,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335840991] [2022-11-20 09:30:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:51,114 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 [2022-11-20 09:30:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:51,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:51,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 09:30:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:51,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:30:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:51,381 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-20 09:30:51,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-20 09:30:51,407 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 09:30:51,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 09:30:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:51,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335840991] [2022-11-20 09:30:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335840991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:51,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:51,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 09:30:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516081562] [2022-11-20 09:30:51,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:51,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:30:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:51,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:30:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:30:51,993 INFO L87 Difference]: Start difference. First operand 377 states and 1112 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:52,755 INFO L93 Difference]: Finished difference Result 379 states and 1120 transitions. [2022-11-20 09:30:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:30:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:30:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:52,759 INFO L225 Difference]: With dead ends: 379 [2022-11-20 09:30:52,759 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 09:30:52,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:30:52,760 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:52,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 12 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-11-20 09:30:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 09:30:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-20 09:30:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 317 states have (on average 3.533123028391167) internal successors, (1120), 378 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1120 transitions. [2022-11-20 09:30:52,777 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1120 transitions. Word has length 3 [2022-11-20 09:30:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:52,780 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1120 transitions. [2022-11-20 09:30:52,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1120 transitions. [2022-11-20 09:30:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:30:52,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:52,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:30:52,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:52,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash 684392, now seen corresponding path program 1 times [2022-11-20 09:30:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9648980] [2022-11-20 09:30:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:52,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:52,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:52,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 09:30:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:30:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:53,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:53,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:53,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:53,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:53,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9648980] [2022-11-20 09:30:53,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9648980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:53,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:53,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 09:30:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803814626] [2022-11-20 09:30:53,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:53,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:30:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:30:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:30:53,571 INFO L87 Difference]: Start difference. First operand 379 states and 1120 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:54,381 INFO L93 Difference]: Finished difference Result 751 states and 2226 transitions. [2022-11-20 09:30:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:30:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:30:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:54,387 INFO L225 Difference]: With dead ends: 751 [2022-11-20 09:30:54,387 INFO L226 Difference]: Without dead ends: 751 [2022-11-20 09:30:54,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:54,389 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:54,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:30:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-20 09:30:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 380. [2022-11-20 09:30:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 318 states have (on average 3.5251572327044025) internal successors, (1121), 379 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1121 transitions. [2022-11-20 09:30:54,406 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1121 transitions. Word has length 3 [2022-11-20 09:30:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:54,407 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1121 transitions. [2022-11-20 09:30:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1121 transitions. [2022-11-20 09:30:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 09:30:54,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:54,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-11-20 09:30:54,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:54,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 21220124, now seen corresponding path program 1 times [2022-11-20 09:30:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530530772] [2022-11-20 09:30:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:54,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:54,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 09:30:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:54,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:30:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:54,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:54,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 09:30:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:54,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:54,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530530772] [2022-11-20 09:30:54,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530530772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:54,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:54,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:30:54,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999254411] [2022-11-20 09:30:54,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:54,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:30:54,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:54,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:30:54,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:30:54,942 INFO L87 Difference]: Start difference. First operand 380 states and 1121 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:56,044 INFO L93 Difference]: Finished difference Result 1493 states and 4433 transitions. [2022-11-20 09:30:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:30:56,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2022-11-20 09:30:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:56,054 INFO L225 Difference]: With dead ends: 1493 [2022-11-20 09:30:56,054 INFO L226 Difference]: Without dead ends: 1493 [2022-11-20 09:30:56,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:56,055 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 453 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:56,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 16 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:30:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-11-20 09:30:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 379. [2022-11-20 09:30:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 318 states have (on average 3.5157232704402515) internal successors, (1118), 378 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1118 transitions. [2022-11-20 09:30:56,079 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1118 transitions. Word has length 4 [2022-11-20 09:30:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:56,079 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1118 transitions. [2022-11-20 09:30:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1118 transitions. [2022-11-20 09:30:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:30:56,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:56,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:30:56,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:56,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:56,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 657833144, now seen corresponding path program 1 times [2022-11-20 09:30:56,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708531962] [2022-11-20 09:30:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:56,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:56,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:56,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 09:30:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:30:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:56,490 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 09:30:56,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 09:30:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:56,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:56,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:56,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708531962] [2022-11-20 09:30:56,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708531962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:56,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:56,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323764779] [2022-11-20 09:30:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:56,625 INFO L87 Difference]: Start difference. First operand 379 states and 1118 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:56,709 INFO L93 Difference]: Finished difference Result 379 states and 1122 transitions. [2022-11-20 09:30:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 09:30:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:56,713 INFO L225 Difference]: With dead ends: 379 [2022-11-20 09:30:56,713 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 09:30:56,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:56,714 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:56,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 09:30:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 09:30:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-20 09:30:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 318 states have (on average 3.5283018867924527) internal successors, (1122), 378 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1122 transitions. [2022-11-20 09:30:56,727 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1122 transitions. Word has length 5 [2022-11-20 09:30:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:56,727 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1122 transitions. [2022-11-20 09:30:56,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1122 transitions. [2022-11-20 09:30:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:30:56,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:56,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:30:56,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:56,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:56,940 INFO L85 PathProgramCache]: Analyzing trace with hash 657833145, now seen corresponding path program 1 times [2022-11-20 09:30:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:56,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247166949] [2022-11-20 09:30:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:56,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:56,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:56,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:56,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 09:30:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:30:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:57,178 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 09:30:57,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 09:30:57,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:30:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:57,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:57,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247166949] [2022-11-20 09:30:57,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247166949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:57,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:57,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:30:57,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381958836] [2022-11-20 09:30:57,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:57,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:30:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:30:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:30:57,697 INFO L87 Difference]: Start difference. First operand 379 states and 1122 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:58,113 INFO L93 Difference]: Finished difference Result 385 states and 1138 transitions. [2022-11-20 09:30:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 09:30:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:58,116 INFO L225 Difference]: With dead ends: 385 [2022-11-20 09:30:58,116 INFO L226 Difference]: Without dead ends: 385 [2022-11-20 09:30:58,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:30:58,117 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:58,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 14 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-20 09:30:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-20 09:30:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 382. [2022-11-20 09:30:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 321 states have (on average 3.520249221183801) internal successors, (1130), 381 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1130 transitions. [2022-11-20 09:30:58,132 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1130 transitions. Word has length 5 [2022-11-20 09:30:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:58,132 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 1130 transitions. [2022-11-20 09:30:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1130 transitions. [2022-11-20 09:30:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:30:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:58,133 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 09:30:58,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:58,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 657824007, now seen corresponding path program 2 times [2022-11-20 09:30:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:58,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632439334] [2022-11-20 09:30:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:58,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:58,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 09:30:58,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:30:58,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:30:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:30:58,534 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 09:30:58,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-20 09:30:58,561 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 09:30:58,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 09:30:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:30:58,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:58,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:58,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632439334] [2022-11-20 09:30:58,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632439334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:58,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:58,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:30:58,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713640127] [2022-11-20 09:30:58,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:58,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:58,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:58,630 INFO L87 Difference]: Start difference. First operand 382 states and 1130 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:58,792 INFO L93 Difference]: Finished difference Result 381 states and 1128 transitions. [2022-11-20 09:30:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 09:30:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:58,795 INFO L225 Difference]: With dead ends: 381 [2022-11-20 09:30:58,795 INFO L226 Difference]: Without dead ends: 381 [2022-11-20 09:30:58,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:58,796 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:58,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-20 09:30:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-11-20 09:30:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 321 states have (on average 3.514018691588785) internal successors, (1128), 380 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1128 transitions. [2022-11-20 09:30:58,808 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1128 transitions. Word has length 5 [2022-11-20 09:30:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:58,808 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 1128 transitions. [2022-11-20 09:30:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1128 transitions. [2022-11-20 09:30:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:58,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:58,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:58,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:59,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1082014180, now seen corresponding path program 1 times [2022-11-20 09:30:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:59,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176478606] [2022-11-20 09:30:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:59,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:59,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 09:30:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:30:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:59,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:59,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:59,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176478606] [2022-11-20 09:30:59,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176478606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:59,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:59,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:59,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230143542] [2022-11-20 09:30:59,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:59,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:59,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:59,144 INFO L87 Difference]: Start difference. First operand 381 states and 1128 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-20 09:30:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:59,319 INFO L93 Difference]: Finished difference Result 261 states and 756 transitions. [2022-11-20 09:30:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-20 09:30:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:59,321 INFO L225 Difference]: With dead ends: 261 [2022-11-20 09:30:59,321 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 09:30:59,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:59,322 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:59,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:30:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 09:30:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-11-20 09:30:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 230 states have (on average 3.2869565217391306) internal successors, (756), 260 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 756 transitions. [2022-11-20 09:30:59,331 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 756 transitions. Word has length 6 [2022-11-20 09:30:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:59,332 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 756 transitions. [2022-11-20 09:30:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-20 09:30:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 756 transitions. [2022-11-20 09:30:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:59,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:59,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:59,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:59,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:30:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1082014179, now seen corresponding path program 1 times [2022-11-20 09:30:59,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:59,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409874525] [2022-11-20 09:30:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:59,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:59,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 09:30:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:30:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:59,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:59,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:59,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409874525] [2022-11-20 09:30:59,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409874525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:59,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:59,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150698819] [2022-11-20 09:30:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:30:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:59,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:30:59,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:30:59,719 INFO L87 Difference]: Start difference. First operand 261 states and 756 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:00,071 INFO L93 Difference]: Finished difference Result 405 states and 1161 transitions. [2022-11-20 09:31:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 09:31:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:00,074 INFO L225 Difference]: With dead ends: 405 [2022-11-20 09:31:00,074 INFO L226 Difference]: Without dead ends: 405 [2022-11-20 09:31:00,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:00,075 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:00,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 4 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-20 09:31:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 311. [2022-11-20 09:31:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 280 states have (on average 3.425) internal successors, (959), 310 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 959 transitions. [2022-11-20 09:31:00,086 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 959 transitions. Word has length 6 [2022-11-20 09:31:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:00,087 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 959 transitions. [2022-11-20 09:31:00,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 959 transitions. [2022-11-20 09:31:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:31:00,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:00,088 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 09:31:00,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:31:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:00,300 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1082292351, now seen corresponding path program 2 times [2022-11-20 09:31:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407496643] [2022-11-20 09:31:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:00,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:00,302 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:00,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 09:31:00,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:00,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:31:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:00,559 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:00,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:00,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:01,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:01,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407496643] [2022-11-20 09:31:01,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407496643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:01,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:01,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:31:01,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712075954] [2022-11-20 09:31:01,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:01,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:31:01,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:31:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:31:01,476 INFO L87 Difference]: Start difference. First operand 311 states and 959 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:06,332 INFO L93 Difference]: Finished difference Result 2417 states and 7549 transitions. [2022-11-20 09:31:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:31:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 09:31:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:06,350 INFO L225 Difference]: With dead ends: 2417 [2022-11-20 09:31:06,350 INFO L226 Difference]: Without dead ends: 2417 [2022-11-20 09:31:06,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:31:06,351 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 865 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:06,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 46 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 09:31:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-11-20 09:31:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 317. [2022-11-20 09:31:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 286 states have (on average 3.395104895104895) internal successors, (971), 316 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 971 transitions. [2022-11-20 09:31:06,382 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 971 transitions. Word has length 6 [2022-11-20 09:31:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:06,383 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 971 transitions. [2022-11-20 09:31:06,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 971 transitions. [2022-11-20 09:31:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:06,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:06,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:06,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:06,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:06,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:06,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash 817303097, now seen corresponding path program 1 times [2022-11-20 09:31:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:06,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929054578] [2022-11-20 09:31:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:06,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:06,599 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:06,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 09:31:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:06,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:31:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:06,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:06,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:06,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929054578] [2022-11-20 09:31:06,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929054578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:06,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:06,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:31:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739941059] [2022-11-20 09:31:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:31:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:31:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:06,781 INFO L87 Difference]: Start difference. First operand 317 states and 971 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:07,099 INFO L93 Difference]: Finished difference Result 317 states and 919 transitions. [2022-11-20 09:31:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:07,103 INFO L225 Difference]: With dead ends: 317 [2022-11-20 09:31:07,103 INFO L226 Difference]: Without dead ends: 317 [2022-11-20 09:31:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:07,104 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:07,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 4 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-20 09:31:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-11-20 09:31:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 286 states have (on average 3.2132867132867133) internal successors, (919), 316 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 919 transitions. [2022-11-20 09:31:07,115 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 919 transitions. Word has length 7 [2022-11-20 09:31:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 919 transitions. [2022-11-20 09:31:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 919 transitions. [2022-11-20 09:31:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:07,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:07,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:07,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:31:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:07,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 817303872, now seen corresponding path program 1 times [2022-11-20 09:31:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:07,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571138918] [2022-11-20 09:31:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:07,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:07,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:07,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 09:31:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:07,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:31:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:07,582 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 09:31:07,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 09:31:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:07,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:07,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571138918] [2022-11-20 09:31:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571138918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:07,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:07,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:31:07,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660426075] [2022-11-20 09:31:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:07,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:07,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:07,620 INFO L87 Difference]: Start difference. First operand 317 states and 919 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:07,767 INFO L93 Difference]: Finished difference Result 306 states and 893 transitions. [2022-11-20 09:31:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:07,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:07,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:07,770 INFO L225 Difference]: With dead ends: 306 [2022-11-20 09:31:07,770 INFO L226 Difference]: Without dead ends: 306 [2022-11-20 09:31:07,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:07,771 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:07,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-20 09:31:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-11-20 09:31:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 279 states have (on average 3.2007168458781363) internal successors, (893), 305 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 893 transitions. [2022-11-20 09:31:07,781 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 893 transitions. Word has length 7 [2022-11-20 09:31:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:07,782 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 893 transitions. [2022-11-20 09:31:07,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 893 transitions. [2022-11-20 09:31:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:07,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:07,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:07,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:07,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:07,995 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:07,995 INFO L85 PathProgramCache]: Analyzing trace with hash 817303873, now seen corresponding path program 1 times [2022-11-20 09:31:07,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762279418] [2022-11-20 09:31:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:07,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 09:31:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:31:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:08,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:08,277 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 09:31:08,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 09:31:08,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:31:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:08,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:08,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762279418] [2022-11-20 09:31:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762279418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:08,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:08,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:31:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466065502] [2022-11-20 09:31:08,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:08,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:31:08,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:31:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:31:08,859 INFO L87 Difference]: Start difference. First operand 306 states and 893 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:08,968 INFO L93 Difference]: Finished difference Result 311 states and 906 transitions. [2022-11-20 09:31:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:31:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:08,971 INFO L225 Difference]: With dead ends: 311 [2022-11-20 09:31:08,971 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 09:31:08,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:31:08,972 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:08,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-11-20 09:31:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 09:31:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2022-11-20 09:31:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 280 states have (on average 3.2035714285714287) internal successors, (897), 306 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 897 transitions. [2022-11-20 09:31:08,981 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 897 transitions. Word has length 7 [2022-11-20 09:31:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:08,981 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 897 transitions. [2022-11-20 09:31:08,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 897 transitions. [2022-11-20 09:31:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:08,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:08,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:09,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:09,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:09,207 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash 817303731, now seen corresponding path program 1 times [2022-11-20 09:31:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:09,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121559249] [2022-11-20 09:31:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:09,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:09,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:09,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:09,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 09:31:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:31:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:09,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:09,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:09,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:10,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121559249] [2022-11-20 09:31:10,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121559249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:10,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:31:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972527259] [2022-11-20 09:31:10,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:31:10,184 INFO L87 Difference]: Start difference. First operand 307 states and 897 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:11,862 INFO L93 Difference]: Finished difference Result 548 states and 1714 transitions. [2022-11-20 09:31:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:31:11,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:11,866 INFO L225 Difference]: With dead ends: 548 [2022-11-20 09:31:11,866 INFO L226 Difference]: Without dead ends: 548 [2022-11-20 09:31:11,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:31:11,867 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 249 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:11,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 10 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:31:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-20 09:31:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 463. [2022-11-20 09:31:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 436 states have (on average 3.5160550458715596) internal successors, (1533), 462 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1533 transitions. [2022-11-20 09:31:11,890 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1533 transitions. Word has length 7 [2022-11-20 09:31:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:11,891 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 1533 transitions. [2022-11-20 09:31:11,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1533 transitions. [2022-11-20 09:31:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:11,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:11,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:11,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:12,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:12,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:12,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 817473219, now seen corresponding path program 1 times [2022-11-20 09:31:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437222374] [2022-11-20 09:31:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:12,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:12,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:12,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 09:31:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:31:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:12,346 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 09:31:12,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 29 [2022-11-20 09:31:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:12,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:12,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437222374] [2022-11-20 09:31:12,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437222374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:12,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:12,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:31:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893836087] [2022-11-20 09:31:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:12,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:12,381 INFO L87 Difference]: Start difference. First operand 463 states and 1533 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:12,527 INFO L93 Difference]: Finished difference Result 429 states and 1422 transitions. [2022-11-20 09:31:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:12,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:12,531 INFO L225 Difference]: With dead ends: 429 [2022-11-20 09:31:12,531 INFO L226 Difference]: Without dead ends: 429 [2022-11-20 09:31:12,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:12,532 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:12,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-20 09:31:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2022-11-20 09:31:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 407 states have (on average 3.493857493857494) internal successors, (1422), 428 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1422 transitions. [2022-11-20 09:31:12,545 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1422 transitions. Word has length 7 [2022-11-20 09:31:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:12,546 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 1422 transitions. [2022-11-20 09:31:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1422 transitions. [2022-11-20 09:31:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:12,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:12,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:12,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:12,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash 817473220, now seen corresponding path program 1 times [2022-11-20 09:31:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:12,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292550513] [2022-11-20 09:31:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:12,761 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:12,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 09:31:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:31:12,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:13,010 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 09:31:13,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-20 09:31:13,028 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 147 treesize of output 143 [2022-11-20 09:31:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:13,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:13,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292550513] [2022-11-20 09:31:13,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292550513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:13,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:13,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:31:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125455615] [2022-11-20 09:31:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:13,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:13,110 INFO L87 Difference]: Start difference. First operand 429 states and 1422 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:13,253 INFO L93 Difference]: Finished difference Result 395 states and 1311 transitions. [2022-11-20 09:31:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:13,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:13,256 INFO L225 Difference]: With dead ends: 395 [2022-11-20 09:31:13,256 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 09:31:13,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:13,257 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:13,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 09:31:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-20 09:31:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 378 states have (on average 3.4682539682539684) internal successors, (1311), 394 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1311 transitions. [2022-11-20 09:31:13,280 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1311 transitions. Word has length 7 [2022-11-20 09:31:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:13,281 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1311 transitions. [2022-11-20 09:31:13,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1311 transitions. [2022-11-20 09:31:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:31:13,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:13,283 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 09:31:13,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:13,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:13,496 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash 808688601, now seen corresponding path program 2 times [2022-11-20 09:31:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466038837] [2022-11-20 09:31:13,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:13,497 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:13,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 09:31:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:31:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:31:13,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:13,725 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:31:13,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:31:13,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-20 09:31:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:31:13,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:13,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:13,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466038837] [2022-11-20 09:31:13,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466038837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:13,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:13,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187125863] [2022-11-20 09:31:13,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:13,939 INFO L87 Difference]: Start difference. First operand 395 states and 1311 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:14,125 INFO L93 Difference]: Finished difference Result 393 states and 1307 transitions. [2022-11-20 09:31:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:31:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:14,128 INFO L225 Difference]: With dead ends: 393 [2022-11-20 09:31:14,128 INFO L226 Difference]: Without dead ends: 393 [2022-11-20 09:31:14,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:14,129 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:14,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-20 09:31:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-20 09:31:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-20 09:31:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 376 states have (on average 3.476063829787234) internal successors, (1307), 392 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1307 transitions. [2022-11-20 09:31:14,142 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1307 transitions. Word has length 7 [2022-11-20 09:31:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:14,142 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 1307 transitions. [2022-11-20 09:31:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1307 transitions. [2022-11-20 09:31:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:31:14,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:14,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:14,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:14,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash -433383836, now seen corresponding path program 1 times [2022-11-20 09:31:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:14,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733954197] [2022-11-20 09:31:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:14,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:14,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:14,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 09:31:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:14,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:14,600 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 09:31:14,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 09:31:14,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:31:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:15,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:15,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733954197] [2022-11-20 09:31:15,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733954197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:15,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:15,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:31:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184862111] [2022-11-20 09:31:15,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:31:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:31:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:31:15,443 INFO L87 Difference]: Start difference. First operand 393 states and 1307 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:16,011 INFO L93 Difference]: Finished difference Result 499 states and 1532 transitions. [2022-11-20 09:31:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:31:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:31:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:16,014 INFO L225 Difference]: With dead ends: 499 [2022-11-20 09:31:16,014 INFO L226 Difference]: Without dead ends: 499 [2022-11-20 09:31:16,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:31:16,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:16,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 123 Unchecked, 0.5s Time] [2022-11-20 09:31:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-20 09:31:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 427. [2022-11-20 09:31:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 410 states have (on average 3.4121951219512194) internal successors, (1399), 426 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1399 transitions. [2022-11-20 09:31:16,029 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1399 transitions. Word has length 8 [2022-11-20 09:31:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:16,029 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 1399 transitions. [2022-11-20 09:31:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1399 transitions. [2022-11-20 09:31:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:31:16,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:16,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:16,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:16,243 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -428138500, now seen corresponding path program 1 times [2022-11-20 09:31:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:16,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462876959] [2022-11-20 09:31:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:16,245 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:16,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 09:31:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:31:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:16,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:16,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462876959] [2022-11-20 09:31:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462876959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:16,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:16,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:16,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400485264] [2022-11-20 09:31:16,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:16,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:31:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:16,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:31:16,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:16,471 INFO L87 Difference]: Start difference. First operand 427 states and 1399 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:16,762 INFO L93 Difference]: Finished difference Result 621 states and 2055 transitions. [2022-11-20 09:31:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:31:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:16,767 INFO L225 Difference]: With dead ends: 621 [2022-11-20 09:31:16,767 INFO L226 Difference]: Without dead ends: 621 [2022-11-20 09:31:16,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:16,769 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:16,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-20 09:31:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 521. [2022-11-20 09:31:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 504 states have (on average 3.6051587301587302) internal successors, (1817), 520 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1817 transitions. [2022-11-20 09:31:16,787 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1817 transitions. Word has length 8 [2022-11-20 09:31:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:16,787 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 1817 transitions. [2022-11-20 09:31:16,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1817 transitions. [2022-11-20 09:31:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:31:16,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:16,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:16,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:16,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:16,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash -387387569, now seen corresponding path program 1 times [2022-11-20 09:31:16,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:16,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297706261] [2022-11-20 09:31:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:16,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:16,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:16,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:16,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 09:31:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:31:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:17,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:17,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:17,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:17,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297706261] [2022-11-20 09:31:17,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297706261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:17,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:17,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:31:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494505387] [2022-11-20 09:31:17,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:31:17,991 INFO L87 Difference]: Start difference. First operand 521 states and 1817 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:19,507 INFO L93 Difference]: Finished difference Result 903 states and 3215 transitions. [2022-11-20 09:31:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:31:19,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:31:19,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:19,517 INFO L225 Difference]: With dead ends: 903 [2022-11-20 09:31:19,517 INFO L226 Difference]: Without dead ends: 903 [2022-11-20 09:31:19,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:31:19,518 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 219 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:19,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 9 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:31:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-20 09:31:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 803. [2022-11-20 09:31:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 786 states have (on average 3.787531806615776) internal successors, (2977), 802 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2977 transitions. [2022-11-20 09:31:19,553 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2977 transitions. Word has length 9 [2022-11-20 09:31:19,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:19,553 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 2977 transitions. [2022-11-20 09:31:19,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,554 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2977 transitions. [2022-11-20 09:31:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:31:19,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:19,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:19,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:19,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash -387234563, now seen corresponding path program 1 times [2022-11-20 09:31:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:19,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109439410] [2022-11-20 09:31:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:19,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:19,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:19,768 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:19,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 09:31:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:31:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:19,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:19,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109439410] [2022-11-20 09:31:19,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109439410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:19,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:19,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484526682] [2022-11-20 09:31:19,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:19,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:19,928 INFO L87 Difference]: Start difference. First operand 803 states and 2977 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:20,056 INFO L93 Difference]: Finished difference Result 675 states and 2417 transitions. [2022-11-20 09:31:20,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:20,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:31:20,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:20,060 INFO L225 Difference]: With dead ends: 675 [2022-11-20 09:31:20,060 INFO L226 Difference]: Without dead ends: 675 [2022-11-20 09:31:20,061 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 [2022-11-20 09:31:20,061 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:20,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-20 09:31:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2022-11-20 09:31:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 662 states have (on average 3.6510574018126887) internal successors, (2417), 674 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2417 transitions. [2022-11-20 09:31:20,090 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2417 transitions. Word has length 9 [2022-11-20 09:31:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:20,091 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 2417 transitions. [2022-11-20 09:31:20,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2417 transitions. [2022-11-20 09:31:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:31:20,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:20,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:20,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 09:31:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:20,292 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:20,293 INFO L85 PathProgramCache]: Analyzing trace with hash -387234564, now seen corresponding path program 1 times [2022-11-20 09:31:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:20,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993020059] [2022-11-20 09:31:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:20,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:20,294 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:20,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 09:31:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:31:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:20,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:20,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993020059] [2022-11-20 09:31:20,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993020059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:20,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:20,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:20,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133838230] [2022-11-20 09:31:20,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:20,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:20,426 INFO L87 Difference]: Start difference. First operand 675 states and 2417 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:20,548 INFO L93 Difference]: Finished difference Result 547 states and 1857 transitions. [2022-11-20 09:31:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:31:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:20,551 INFO L225 Difference]: With dead ends: 547 [2022-11-20 09:31:20,552 INFO L226 Difference]: Without dead ends: 547 [2022-11-20 09:31:20,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:20,552 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:20,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:20,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-11-20 09:31:20,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-11-20 09:31:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 538 states have (on average 3.4516728624535316) internal successors, (1857), 546 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1857 transitions. [2022-11-20 09:31:20,566 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1857 transitions. Word has length 9 [2022-11-20 09:31:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 1857 transitions. [2022-11-20 09:31:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1857 transitions. [2022-11-20 09:31:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:31:20,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:20,568 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:20,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:20,780 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 130726180, now seen corresponding path program 2 times [2022-11-20 09:31:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:20,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855521378] [2022-11-20 09:31:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:20,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:20,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:20,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:20,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 09:31:20,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:31:20,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:21,019 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 09:31:21,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 09:31:21,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:31:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:31:21,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:21,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855521378] [2022-11-20 09:31:21,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855521378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:21,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:21,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87473503] [2022-11-20 09:31:21,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:21,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:21,290 INFO L87 Difference]: Start difference. First operand 547 states and 1857 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:21,439 INFO L93 Difference]: Finished difference Result 543 states and 1846 transitions. [2022-11-20 09:31:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 09:31:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:21,443 INFO L225 Difference]: With dead ends: 543 [2022-11-20 09:31:21,443 INFO L226 Difference]: Without dead ends: 543 [2022-11-20 09:31:21,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:31:21,444 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-11-20 09:31:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-20 09:31:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 535. [2022-11-20 09:31:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 527 states have (on average 3.4667931688804554) internal successors, (1827), 534 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1827 transitions. [2022-11-20 09:31:21,457 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1827 transitions. Word has length 10 [2022-11-20 09:31:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:21,458 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 1827 transitions. [2022-11-20 09:31:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1827 transitions. [2022-11-20 09:31:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:31:21,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:21,459 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:21,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:21,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:21,670 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash 130726813, now seen corresponding path program 2 times [2022-11-20 09:31:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:21,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801852367] [2022-11-20 09:31:21,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:21,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:21,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:21,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:21,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 09:31:21,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:21,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:21,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:21,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:22,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:23,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801852367] [2022-11-20 09:31:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801852367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:23,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:23,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:31:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988985265] [2022-11-20 09:31:23,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:23,790 INFO L87 Difference]: Start difference. First operand 535 states and 1827 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:25,204 INFO L93 Difference]: Finished difference Result 546 states and 1851 transitions. [2022-11-20 09:31:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:31:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 09:31:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:25,208 INFO L225 Difference]: With dead ends: 546 [2022-11-20 09:31:25,208 INFO L226 Difference]: Without dead ends: 546 [2022-11-20 09:31:25,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:31:25,209 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:25,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 30 Unchecked, 0.7s Time] [2022-11-20 09:31:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-20 09:31:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 546. [2022-11-20 09:31:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 538 states have (on average 3.440520446096654) internal successors, (1851), 545 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1851 transitions. [2022-11-20 09:31:25,224 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1851 transitions. Word has length 10 [2022-11-20 09:31:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:25,224 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 1851 transitions. [2022-11-20 09:31:25,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1851 transitions. [2022-11-20 09:31:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:25,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:25,226 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:25,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:31:25,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:25,427 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash -328318634, now seen corresponding path program 1 times [2022-11-20 09:31:25,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:25,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759743922] [2022-11-20 09:31:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:25,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:25,429 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:25,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 09:31:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:25,737 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:25,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:26,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:27,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759743922] [2022-11-20 09:31:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759743922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:27,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:27,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:31:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825249007] [2022-11-20 09:31:27,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:27,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:27,427 INFO L87 Difference]: Start difference. First operand 546 states and 1851 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:29,559 INFO L93 Difference]: Finished difference Result 606 states and 2093 transitions. [2022-11-20 09:31:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:31:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:31:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:29,563 INFO L225 Difference]: With dead ends: 606 [2022-11-20 09:31:29,563 INFO L226 Difference]: Without dead ends: 606 [2022-11-20 09:31:29,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:31:29,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:29,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 42 Unchecked, 1.7s Time] [2022-11-20 09:31:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-20 09:31:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 556. [2022-11-20 09:31:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 548 states have (on average 3.428832116788321) internal successors, (1879), 555 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1879 transitions. [2022-11-20 09:31:29,578 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1879 transitions. Word has length 11 [2022-11-20 09:31:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:29,578 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 1879 transitions. [2022-11-20 09:31:29,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1879 transitions. [2022-11-20 09:31:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:29,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:29,580 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:29,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:29,792 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash -245201744, now seen corresponding path program 2 times [2022-11-20 09:31:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:29,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635937889] [2022-11-20 09:31:29,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:29,794 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:29,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 09:31:29,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:30,096 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:30,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:30,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:31,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:31,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635937889] [2022-11-20 09:31:31,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635937889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:31,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:31,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:31:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285495975] [2022-11-20 09:31:31,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:31,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:31,812 INFO L87 Difference]: Start difference. First operand 556 states and 1879 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:36,893 INFO L93 Difference]: Finished difference Result 1085 states and 4142 transitions. [2022-11-20 09:31:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:31:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:31:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:36,897 INFO L225 Difference]: With dead ends: 1085 [2022-11-20 09:31:36,897 INFO L226 Difference]: Without dead ends: 1085 [2022-11-20 09:31:36,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:31:36,898 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:36,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 66 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 597 Invalid, 0 Unknown, 10 Unchecked, 3.9s Time] [2022-11-20 09:31:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-11-20 09:31:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 603. [2022-11-20 09:31:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 595 states have (on average 3.5025210084033613) internal successors, (2084), 602 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2084 transitions. [2022-11-20 09:31:36,917 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2084 transitions. Word has length 11 [2022-11-20 09:31:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:36,917 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 2084 transitions. [2022-11-20 09:31:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2084 transitions. [2022-11-20 09:31:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:36,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:36,918 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:36,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:37,131 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 509148640, now seen corresponding path program 3 times [2022-11-20 09:31:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043414204] [2022-11-20 09:31:37,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:37,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:37,134 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:37,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 09:31:37,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:31:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:31:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:37,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:37,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:37,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043414204] [2022-11-20 09:31:37,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043414204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:37,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:37,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 09:31:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287749364] [2022-11-20 09:31:37,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:31:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:31:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:31:37,623 INFO L87 Difference]: Start difference. First operand 603 states and 2084 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:38,686 INFO L93 Difference]: Finished difference Result 967 states and 3177 transitions. [2022-11-20 09:31:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:31:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:38,690 INFO L225 Difference]: With dead ends: 967 [2022-11-20 09:31:38,690 INFO L226 Difference]: Without dead ends: 967 [2022-11-20 09:31:38,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:31:38,691 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:38,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 21 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 09:31:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-20 09:31:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 747. [2022-11-20 09:31:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 739 states have (on average 3.4776725304465494) internal successors, (2570), 746 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2570 transitions. [2022-11-20 09:31:38,715 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2570 transitions. Word has length 11 [2022-11-20 09:31:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:38,715 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 2570 transitions. [2022-11-20 09:31:38,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2570 transitions. [2022-11-20 09:31:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:31:38,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:38,716 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:38,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:38,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:38,930 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -81929028, now seen corresponding path program 2 times [2022-11-20 09:31:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:38,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827335593] [2022-11-20 09:31:38,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:38,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:38,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:38,932 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:38,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 09:31:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:39,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:39,245 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:39,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:39,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:41,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827335593] [2022-11-20 09:31:41,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827335593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:41,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:41,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:31:41,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501644601] [2022-11-20 09:31:41,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:41,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:41,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:41,007 INFO L87 Difference]: Start difference. First operand 747 states and 2570 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:42,996 INFO L93 Difference]: Finished difference Result 753 states and 2586 transitions. [2022-11-20 09:31:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:31:42,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 09:31:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:42,999 INFO L225 Difference]: With dead ends: 753 [2022-11-20 09:31:42,999 INFO L226 Difference]: Without dead ends: 753 [2022-11-20 09:31:42,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:31:43,000 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:43,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 60 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 192 Invalid, 0 Unknown, 31 Unchecked, 1.3s Time] [2022-11-20 09:31:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-20 09:31:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2022-11-20 09:31:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 745 states have (on average 3.4711409395973156) internal successors, (2586), 752 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2586 transitions. [2022-11-20 09:31:43,019 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2586 transitions. Word has length 12 [2022-11-20 09:31:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:43,019 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 2586 transitions. [2022-11-20 09:31:43,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2586 transitions. [2022-11-20 09:31:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:31:43,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:43,021 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:43,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:43,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:43,234 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2006482511, now seen corresponding path program 4 times [2022-11-20 09:31:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:43,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182747994] [2022-11-20 09:31:43,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:43,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:43,236 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 09:31:43,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:43,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:43,553 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:43,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:43,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:45,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:45,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182747994] [2022-11-20 09:31:45,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182747994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:45,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:45,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:31:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975380410] [2022-11-20 09:31:45,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:31:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:31:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:31:45,579 INFO L87 Difference]: Start difference. First operand 753 states and 2586 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:52,963 INFO L93 Difference]: Finished difference Result 2236 states and 7818 transitions. [2022-11-20 09:31:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 09:31:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 09:31:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:52,971 INFO L225 Difference]: With dead ends: 2236 [2022-11-20 09:31:52,971 INFO L226 Difference]: Without dead ends: 2236 [2022-11-20 09:31:52,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:31:52,971 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 228 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:52,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 82 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 799 Invalid, 0 Unknown, 233 Unchecked, 5.1s Time] [2022-11-20 09:31:52,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-11-20 09:31:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 759. [2022-11-20 09:31:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 751 states have (on average 3.456724367509987) internal successors, (2596), 758 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) [2022-11-20 09:31:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2596 transitions. [2022-11-20 09:31:53,000 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2596 transitions. Word has length 12 [2022-11-20 09:31:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:53,000 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 2596 transitions. [2022-11-20 09:31:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2596 transitions. [2022-11-20 09:31:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:31:53,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:53,002 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:53,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:53,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:53,215 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:31:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1536815591, now seen corresponding path program 5 times [2022-11-20 09:31:53,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:53,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164944500] [2022-11-20 09:31:53,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:53,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:53,217 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:53,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 09:31:53,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:31:53,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:31:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:53,520 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:53,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:53,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:55,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164944500] [2022-11-20 09:31:55,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164944500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:55,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:55,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:31:55,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047930053] [2022-11-20 09:31:55,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:55,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:31:55,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:55,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:31:55,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:31:55,508 INFO L87 Difference]: Start difference. First operand 759 states and 2596 transitions. Second operand has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:06,667 INFO L93 Difference]: Finished difference Result 2607 states and 8688 transitions. [2022-11-20 09:32:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:32:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 09:32:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:06,679 INFO L225 Difference]: With dead ends: 2607 [2022-11-20 09:32:06,680 INFO L226 Difference]: Without dead ends: 2607 [2022-11-20 09:32:06,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:32:06,681 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 432 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:06,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 84 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 974 Invalid, 0 Unknown, 296 Unchecked, 6.5s Time] [2022-11-20 09:32:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-11-20 09:32:06,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 859. [2022-11-20 09:32:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 851 states have (on average 3.446533490011751) internal successors, (2933), 858 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2933 transitions. [2022-11-20 09:32:06,721 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2933 transitions. Word has length 12 [2022-11-20 09:32:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:06,721 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 2933 transitions. [2022-11-20 09:32:06,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.263157894736842) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2933 transitions. [2022-11-20 09:32:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:32:06,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:06,723 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 09:32:06,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:06,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:06,936 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:32:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:06,938 INFO L85 PathProgramCache]: Analyzing trace with hash 33320481, now seen corresponding path program 3 times [2022-11-20 09:32:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754202577] [2022-11-20 09:32:06,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:06,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:06,940 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:06,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 09:32:07,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 09:32:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:32:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:07,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:07,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:07,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:11,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754202577] [2022-11-20 09:32:11,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754202577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:11,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:11,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 09:32:11,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339350962] [2022-11-20 09:32:11,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:11,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:32:11,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:11,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:32:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:32:11,324 INFO L87 Difference]: Start difference. First operand 859 states and 2933 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:34,684 INFO L93 Difference]: Finished difference Result 10359 states and 35676 transitions. [2022-11-20 09:32:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:32:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 09:32:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:34,733 INFO L225 Difference]: With dead ends: 10359 [2022-11-20 09:32:34,733 INFO L226 Difference]: Without dead ends: 10359 [2022-11-20 09:32:34,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:32:34,734 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2470 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2470 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:34,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2470 Valid, 238 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-20 09:32:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-20 09:32:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 871. [2022-11-20 09:32:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 3.4264194669756662) internal successors, (2957), 870 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2957 transitions. [2022-11-20 09:32:34,917 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2957 transitions. Word has length 12 [2022-11-20 09:32:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:34,917 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 2957 transitions. [2022-11-20 09:32:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2957 transitions. [2022-11-20 09:32:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:34,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:34,919 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:34,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:35,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:35,132 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:32:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:35,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1554767414, now seen corresponding path program 1 times [2022-11-20 09:32:35,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:35,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574094848] [2022-11-20 09:32:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:35,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:35,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:35,134 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:35,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 09:32:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:35,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:35,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:35,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:37,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574094848] [2022-11-20 09:32:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574094848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:37,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:32:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222777833] [2022-11-20 09:32:37,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:32:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:32:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:32:37,213 INFO L87 Difference]: Start difference. First operand 871 states and 2957 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:39,401 INFO L93 Difference]: Finished difference Result 931 states and 3187 transitions. [2022-11-20 09:32:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:32:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:32:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:39,406 INFO L225 Difference]: With dead ends: 931 [2022-11-20 09:32:39,406 INFO L226 Difference]: Without dead ends: 931 [2022-11-20 09:32:39,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:32:39,415 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:39,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 201 Invalid, 0 Unknown, 36 Unchecked, 1.5s Time] [2022-11-20 09:32:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-20 09:32:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2022-11-20 09:32:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 921 states have (on average 3.456026058631922) internal successors, (3183), 928 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3183 transitions. [2022-11-20 09:32:39,444 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3183 transitions. Word has length 13 [2022-11-20 09:32:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:39,445 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 3183 transitions. [2022-11-20 09:32:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3183 transitions. [2022-11-20 09:32:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:39,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:39,446 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:39,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:39,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:39,659 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:32:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1748706824, now seen corresponding path program 2 times [2022-11-20 09:32:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:39,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634140920] [2022-11-20 09:32:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:39,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:39,662 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 09:32:39,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:39,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:40,025 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:40,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:40,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:41,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634140920] [2022-11-20 09:32:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634140920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:41,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:41,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:32:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359675290] [2022-11-20 09:32:41,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:41,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:32:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:32:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:32:41,798 INFO L87 Difference]: Start difference. First operand 929 states and 3183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:44,489 INFO L93 Difference]: Finished difference Result 1033 states and 3579 transitions. [2022-11-20 09:32:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:32:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:32:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:44,494 INFO L225 Difference]: With dead ends: 1033 [2022-11-20 09:32:44,494 INFO L226 Difference]: Without dead ends: 1033 [2022-11-20 09:32:44,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:32:44,495 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:44,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 62 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 107 Unchecked, 2.0s Time] [2022-11-20 09:32:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-11-20 09:32:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 981. [2022-11-20 09:32:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 973 states have (on average 3.472764645426516) internal successors, (3379), 980 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3379 transitions. [2022-11-20 09:32:44,520 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3379 transitions. Word has length 13 [2022-11-20 09:32:44,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:44,520 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 3379 transitions. [2022-11-20 09:32:44,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3379 transitions. [2022-11-20 09:32:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:44,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:44,528 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:44,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:44,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:44,742 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:32:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:44,742 INFO L85 PathProgramCache]: Analyzing trace with hash 676269566, now seen corresponding path program 3 times [2022-11-20 09:32:44,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:44,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185225361] [2022-11-20 09:32:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:44,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:44,743 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:44,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 09:32:44,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:32:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:32:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:45,092 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:45,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:45,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:46,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:46,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185225361] [2022-11-20 09:32:46,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185225361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:46,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:46,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:32:46,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112292977] [2022-11-20 09:32:46,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:46,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:32:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:46,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:32:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:32:46,942 INFO L87 Difference]: Start difference. First operand 981 states and 3379 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:49,194 INFO L93 Difference]: Finished difference Result 1071 states and 3592 transitions. [2022-11-20 09:32:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:32:49,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:32:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:49,199 INFO L225 Difference]: With dead ends: 1071 [2022-11-20 09:32:49,199 INFO L226 Difference]: Without dead ends: 1071 [2022-11-20 09:32:49,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:32:49,200 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:49,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 11 Unchecked, 1.6s Time] [2022-11-20 09:32:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-11-20 09:32:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 987. [2022-11-20 09:32:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 979 states have (on average 3.4759959141981613) internal successors, (3403), 986 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3403 transitions. [2022-11-20 09:32:49,239 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3403 transitions. Word has length 13 [2022-11-20 09:32:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:49,240 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 3403 transitions. [2022-11-20 09:32:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3403 transitions. [2022-11-20 09:32:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:49,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:49,242 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:49,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:49,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:49,456 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:32:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash -530466923, now seen corresponding path program 1 times [2022-11-20 09:32:49,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:49,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102314498] [2022-11-20 09:32:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:49,457 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 [2022-11-20 09:32:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:49,458 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:49,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 09:32:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:32:49,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:49,780 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:49,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:50,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:51,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102314498] [2022-11-20 09:32:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102314498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:51,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:51,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:32:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624880922] [2022-11-20 09:32:51,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:51,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:32:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:32:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:32:51,960 INFO L87 Difference]: Start difference. First operand 987 states and 3403 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:01,634 INFO L93 Difference]: Finished difference Result 3037 states and 10206 transitions. [2022-11-20 09:33:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 09:33:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:33:01,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:01,643 INFO L225 Difference]: With dead ends: 3037 [2022-11-20 09:33:01,643 INFO L226 Difference]: Without dead ends: 3037 [2022-11-20 09:33:01,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:33:01,643 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:01,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 119 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1044 Invalid, 0 Unknown, 305 Unchecked, 6.2s Time] [2022-11-20 09:33:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2022-11-20 09:33:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 1093. [2022-11-20 09:33:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1085 states have (on average 3.6046082949308755) internal successors, (3911), 1092 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3911 transitions. [2022-11-20 09:33:01,694 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3911 transitions. Word has length 13 [2022-11-20 09:33:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:01,694 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 3911 transitions. [2022-11-20 09:33:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3911 transitions. [2022-11-20 09:33:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:01,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:01,696 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:01,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:01,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:01,909 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:01,910 INFO L85 PathProgramCache]: Analyzing trace with hash -725000979, now seen corresponding path program 2 times [2022-11-20 09:33:01,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:01,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565637606] [2022-11-20 09:33:01,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:01,910 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:01,911 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:01,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 09:33:02,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:02,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:33:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:02,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:02,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:02,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:04,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:04,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565637606] [2022-11-20 09:33:04,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565637606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:04,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:33:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357848577] [2022-11-20 09:33:04,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:04,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:33:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:33:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:33:04,395 INFO L87 Difference]: Start difference. First operand 1093 states and 3911 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:08,615 INFO L93 Difference]: Finished difference Result 1609 states and 5244 transitions. [2022-11-20 09:33:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:33:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:33:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:08,620 INFO L225 Difference]: With dead ends: 1609 [2022-11-20 09:33:08,620 INFO L226 Difference]: Without dead ends: 1609 [2022-11-20 09:33:08,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:33:08,621 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:08,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 393 Invalid, 0 Unknown, 118 Unchecked, 2.3s Time] [2022-11-20 09:33:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-20 09:33:08,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 997. [2022-11-20 09:33:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 989 states have (on average 3.479271991911021) internal successors, (3441), 996 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3441 transitions. [2022-11-20 09:33:08,644 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3441 transitions. Word has length 13 [2022-11-20 09:33:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 997 states and 3441 transitions. [2022-11-20 09:33:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3441 transitions. [2022-11-20 09:33:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:08,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:08,646 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:08,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:33:08,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:08,859 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash -338785205, now seen corresponding path program 3 times [2022-11-20 09:33:08,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117083817] [2022-11-20 09:33:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:08,860 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 [2022-11-20 09:33:08,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:08,861 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 09:33:09,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:33:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:33:09,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:09,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:09,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:09,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:33:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:09,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:09,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:09,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117083817] [2022-11-20 09:33:09,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117083817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:09,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:09,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 09:33:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419911467] [2022-11-20 09:33:09,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:33:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:33:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:33:09,926 INFO L87 Difference]: Start difference. First operand 997 states and 3441 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:12,403 INFO L93 Difference]: Finished difference Result 1635 states and 5360 transitions. [2022-11-20 09:33:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:33:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:33:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:12,408 INFO L225 Difference]: With dead ends: 1635 [2022-11-20 09:33:12,408 INFO L226 Difference]: Without dead ends: 1635 [2022-11-20 09:33:12,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:33:12,408 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 331 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:12,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 64 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 09:33:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-20 09:33:12,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1074. [2022-11-20 09:33:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1066 states have (on average 3.471857410881801) internal successors, (3701), 1073 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3701 transitions. [2022-11-20 09:33:12,429 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3701 transitions. Word has length 13 [2022-11-20 09:33:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:12,429 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 3701 transitions. [2022-11-20 09:33:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3701 transitions. [2022-11-20 09:33:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:12,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:12,431 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-20 09:33:12,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:12,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:12,645 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1288777133, now seen corresponding path program 3 times [2022-11-20 09:33:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:12,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778312964] [2022-11-20 09:33:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:12,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:12,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:12,647 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:12,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 09:33:12,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:33:12,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:33:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:13,129 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:13,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:13,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:14,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:14,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778312964] [2022-11-20 09:33:14,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778312964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:14,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:14,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-20 09:33:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448235237] [2022-11-20 09:33:14,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:33:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:33:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:33:14,995 INFO L87 Difference]: Start difference. First operand 1074 states and 3701 transitions. Second operand has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 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) [2022-11-20 09:33:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:30,775 INFO L93 Difference]: Finished difference Result 2314 states and 7335 transitions. [2022-11-20 09:33:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 09:33:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 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 13 [2022-11-20 09:33:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:30,781 INFO L225 Difference]: With dead ends: 2314 [2022-11-20 09:33:30,781 INFO L226 Difference]: Without dead ends: 2314 [2022-11-20 09:33:30,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:33:30,782 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 524 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:30,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 133 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1296 Invalid, 0 Unknown, 481 Unchecked, 11.0s Time] [2022-11-20 09:33:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-11-20 09:33:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1376. [2022-11-20 09:33:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1368 states have (on average 3.58187134502924) internal successors, (4900), 1375 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4900 transitions. [2022-11-20 09:33:30,810 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4900 transitions. Word has length 13 [2022-11-20 09:33:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:30,810 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 4900 transitions. [2022-11-20 09:33:30,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 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) [2022-11-20 09:33:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4900 transitions. [2022-11-20 09:33:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:30,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:30,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 09:33:30,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:33:31,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:31,027 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash 265308004, now seen corresponding path program 4 times [2022-11-20 09:33:31,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727638924] [2022-11-20 09:33:31,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:33:31,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:31,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:31,030 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:31,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 09:33:31,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:33:31,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:33:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:31,409 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:31,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:33:31,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:33:33,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727638924] [2022-11-20 09:33:33,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727638924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:33,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:33,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:33:33,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103987441] [2022-11-20 09:33:33,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:33:33,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:33:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:33:33,112 INFO L87 Difference]: Start difference. First operand 1376 states and 4900 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:42,170 INFO L93 Difference]: Finished difference Result 2737 states and 9156 transitions. [2022-11-20 09:33:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:33:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:33:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:42,177 INFO L225 Difference]: With dead ends: 2737 [2022-11-20 09:33:42,177 INFO L226 Difference]: Without dead ends: 2737 [2022-11-20 09:33:42,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:33:42,177 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 882 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:42,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 36 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 09:33:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2022-11-20 09:33:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 1497. [2022-11-20 09:33:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1489 states have (on average 3.6930826057756883) internal successors, (5499), 1496 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5499 transitions. [2022-11-20 09:33:42,210 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5499 transitions. Word has length 13 [2022-11-20 09:33:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 5499 transitions. [2022-11-20 09:33:42,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5499 transitions. [2022-11-20 09:33:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:33:42,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:42,213 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:42,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:42,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:42,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2083722782, now seen corresponding path program 1 times [2022-11-20 09:33:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:42,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368160417] [2022-11-20 09:33:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:42,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:42,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:42,428 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:42,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 09:33:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:33:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:42,780 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:42,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:43,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:44,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:44,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368160417] [2022-11-20 09:33:44,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368160417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:44,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:44,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:33:44,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304700173] [2022-11-20 09:33:44,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:33:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:33:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:33:44,576 INFO L87 Difference]: Start difference. First operand 1497 states and 5499 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:47,037 INFO L93 Difference]: Finished difference Result 1572 states and 5828 transitions. [2022-11-20 09:33:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:33:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:33:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:47,042 INFO L225 Difference]: With dead ends: 1572 [2022-11-20 09:33:47,042 INFO L226 Difference]: Without dead ends: 1572 [2022-11-20 09:33:47,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:33:47,043 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:47,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 21 Unchecked, 1.7s Time] [2022-11-20 09:33:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2022-11-20 09:33:47,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1571. [2022-11-20 09:33:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1563 states have (on average 3.727447216890595) internal successors, (5826), 1570 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5826 transitions. [2022-11-20 09:33:47,068 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5826 transitions. Word has length 14 [2022-11-20 09:33:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:47,069 INFO L495 AbstractCegarLoop]: Abstraction has 1571 states and 5826 transitions. [2022-11-20 09:33:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5826 transitions. [2022-11-20 09:33:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:33:47,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:47,071 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:47,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:33:47,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:47,284 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2056017152, now seen corresponding path program 2 times [2022-11-20 09:33:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:47,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885155780] [2022-11-20 09:33:47,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:47,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:47,285 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:47,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 09:33:47,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:47,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:33:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:47,633 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:47,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:48,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:49,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885155780] [2022-11-20 09:33:49,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885155780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:49,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:49,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:33:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766387024] [2022-11-20 09:33:49,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:33:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:49,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:33:49,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:33:49,605 INFO L87 Difference]: Start difference. First operand 1571 states and 5826 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:52,105 INFO L93 Difference]: Finished difference Result 1628 states and 6083 transitions. [2022-11-20 09:33:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:33:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:33:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:52,111 INFO L225 Difference]: With dead ends: 1628 [2022-11-20 09:33:52,111 INFO L226 Difference]: Without dead ends: 1628 [2022-11-20 09:33:52,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:33:52,111 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:52,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 58 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 252 Invalid, 0 Unknown, 48 Unchecked, 1.7s Time] [2022-11-20 09:33:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-20 09:33:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1594. [2022-11-20 09:33:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1586 states have (on average 3.7421185372005046) internal successors, (5935), 1593 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5935 transitions. [2022-11-20 09:33:52,138 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5935 transitions. Word has length 14 [2022-11-20 09:33:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:52,139 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 5935 transitions. [2022-11-20 09:33:52,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5935 transitions. [2022-11-20 09:33:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:33:52,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:52,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:52,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:33:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:52,354 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1731820423, now seen corresponding path program 1 times [2022-11-20 09:33:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281036036] [2022-11-20 09:33:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:52,356 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:52,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 09:33:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:33:52,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:33:52,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:33:52,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281036036] [2022-11-20 09:33:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281036036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:52,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:52,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:33:52,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015162509] [2022-11-20 09:33:52,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:33:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:33:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:33:52,595 INFO L87 Difference]: Start difference. First operand 1594 states and 5935 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:52,729 INFO L93 Difference]: Finished difference Result 1577 states and 5888 transitions. [2022-11-20 09:33:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:33:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:33:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:52,733 INFO L225 Difference]: With dead ends: 1577 [2022-11-20 09:33:52,733 INFO L226 Difference]: Without dead ends: 1577 [2022-11-20 09:33:52,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:33:52,734 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:52,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:33:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2022-11-20 09:33:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1510. [2022-11-20 09:33:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1505 states have (on average 3.792691029900332) internal successors, (5708), 1509 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5708 transitions. [2022-11-20 09:33:52,774 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5708 transitions. Word has length 14 [2022-11-20 09:33:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:52,774 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 5708 transitions. [2022-11-20 09:33:52,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5708 transitions. [2022-11-20 09:33:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:33:52,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:52,776 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:52,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-20 09:33:52,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:52,987 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2103940746, now seen corresponding path program 3 times [2022-11-20 09:33:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14494080] [2022-11-20 09:33:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:52,988 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:52,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 09:33:53,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:33:53,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:53,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:33:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:53,371 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:53,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:55,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14494080] [2022-11-20 09:33:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14494080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:55,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:55,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:33:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856163842] [2022-11-20 09:33:55,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:55,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:33:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:33:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:33:55,335 INFO L87 Difference]: Start difference. First operand 1510 states and 5708 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:57,888 INFO L93 Difference]: Finished difference Result 1750 states and 6477 transitions. [2022-11-20 09:33:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:33:57,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:33:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:57,894 INFO L225 Difference]: With dead ends: 1750 [2022-11-20 09:33:57,894 INFO L226 Difference]: Without dead ends: 1750 [2022-11-20 09:33:57,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:33:57,894 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:57,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 276 Invalid, 0 Unknown, 38 Unchecked, 1.7s Time] [2022-11-20 09:33:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-11-20 09:33:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1593. [2022-11-20 09:33:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1588 states have (on average 3.8161209068010074) internal successors, (6060), 1592 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 6060 transitions. [2022-11-20 09:33:57,928 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 6060 transitions. Word has length 14 [2022-11-20 09:33:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:57,928 INFO L495 AbstractCegarLoop]: Abstraction has 1593 states and 6060 transitions. [2022-11-20 09:33:57,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 6060 transitions. [2022-11-20 09:33:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:33:57,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:57,929 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:57,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:58,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:58,130 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:33:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash 925119116, now seen corresponding path program 1 times [2022-11-20 09:33:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130312643] [2022-11-20 09:33:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:58,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:58,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:58,132 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 09:33:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:33:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:58,442 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:58,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:58,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:00,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130312643] [2022-11-20 09:34:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130312643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:00,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:00,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950227666] [2022-11-20 09:34:00,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:00,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:00,278 INFO L87 Difference]: Start difference. First operand 1593 states and 6060 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:02,626 INFO L93 Difference]: Finished difference Result 1713 states and 6504 transitions. [2022-11-20 09:34:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:34:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:02,631 INFO L225 Difference]: With dead ends: 1713 [2022-11-20 09:34:02,631 INFO L226 Difference]: Without dead ends: 1713 [2022-11-20 09:34:02,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:02,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:02,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 58 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 114 Unchecked, 1.6s Time] [2022-11-20 09:34:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-20 09:34:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1655. [2022-11-20 09:34:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1650 states have (on average 3.8145454545454545) internal successors, (6294), 1654 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 6294 transitions. [2022-11-20 09:34:02,657 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 6294 transitions. Word has length 14 [2022-11-20 09:34:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:02,657 INFO L495 AbstractCegarLoop]: Abstraction has 1655 states and 6294 transitions. [2022-11-20 09:34:02,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 6294 transitions. [2022-11-20 09:34:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:02,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:02,659 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:02,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-20 09:34:02,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:02,871 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -538510396, now seen corresponding path program 2 times [2022-11-20 09:34:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:02,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094805080] [2022-11-20 09:34:02,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:34:02,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:02,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:02,873 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:02,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 09:34:03,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:34:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:03,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:03,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:03,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:04,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094805080] [2022-11-20 09:34:04,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094805080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:04,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:04,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:04,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646114417] [2022-11-20 09:34:04,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:04,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:04,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:04,981 INFO L87 Difference]: Start difference. First operand 1655 states and 6294 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:06,043 INFO L93 Difference]: Finished difference Result 1709 states and 6530 transitions. [2022-11-20 09:34:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:06,048 INFO L225 Difference]: With dead ends: 1709 [2022-11-20 09:34:06,048 INFO L226 Difference]: Without dead ends: 1709 [2022-11-20 09:34:06,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:06,048 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:06,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-20 09:34:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-11-20 09:34:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1683. [2022-11-20 09:34:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1678 states have (on average 3.8259833134684147) internal successors, (6420), 1682 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 6420 transitions. [2022-11-20 09:34:06,085 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 6420 transitions. Word has length 14 [2022-11-20 09:34:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:06,085 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 6420 transitions. [2022-11-20 09:34:06,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 6420 transitions. [2022-11-20 09:34:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:06,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:06,087 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:06,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:06,300 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash -649927562, now seen corresponding path program 3 times [2022-11-20 09:34:06,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:06,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479887242] [2022-11-20 09:34:06,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:34:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:06,302 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:06,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 09:34:06,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:34:06,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:06,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:34:06,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:06,709 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:06,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:08,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479887242] [2022-11-20 09:34:08,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479887242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:08,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:08,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075739904] [2022-11-20 09:34:08,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:08,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:08,695 INFO L87 Difference]: Start difference. First operand 1683 states and 6420 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:09,975 INFO L93 Difference]: Finished difference Result 1699 states and 6484 transitions. [2022-11-20 09:34:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:09,980 INFO L225 Difference]: With dead ends: 1699 [2022-11-20 09:34:09,980 INFO L226 Difference]: Without dead ends: 1699 [2022-11-20 09:34:09,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:09,981 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 50 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 34 Unchecked, 0.7s Time] [2022-11-20 09:34:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-20 09:34:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1667. [2022-11-20 09:34:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1662 states have (on average 3.8182912154031285) internal successors, (6346), 1666 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 6346 transitions. [2022-11-20 09:34:10,008 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 6346 transitions. Word has length 14 [2022-11-20 09:34:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:10,008 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 6346 transitions. [2022-11-20 09:34:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 6346 transitions. [2022-11-20 09:34:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:10,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:10,009 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:10,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-20 09:34:10,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:10,211 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -540888980, now seen corresponding path program 4 times [2022-11-20 09:34:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486756756] [2022-11-20 09:34:10,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:10,213 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 09:34:10,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:10,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:10,532 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:10,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:10,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:12,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:12,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486756756] [2022-11-20 09:34:12,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486756756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:12,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:12,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:12,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819648151] [2022-11-20 09:34:12,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:12,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:12,323 INFO L87 Difference]: Start difference. First operand 1667 states and 6346 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:14,047 INFO L93 Difference]: Finished difference Result 1690 states and 6446 transitions. [2022-11-20 09:34:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:14,052 INFO L225 Difference]: With dead ends: 1690 [2022-11-20 09:34:14,052 INFO L226 Difference]: Without dead ends: 1690 [2022-11-20 09:34:14,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:14,053 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:14,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 32 Unchecked, 1.0s Time] [2022-11-20 09:34:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-11-20 09:34:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1680. [2022-11-20 09:34:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1675 states have (on average 3.8256716417910446) internal successors, (6408), 1679 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6408 transitions. [2022-11-20 09:34:14,104 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6408 transitions. Word has length 14 [2022-11-20 09:34:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:14,105 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 6408 transitions. [2022-11-20 09:34:14,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6408 transitions. [2022-11-20 09:34:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:14,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:14,107 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:14,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:14,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:14,319 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1616608785, now seen corresponding path program 4 times [2022-11-20 09:34:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:14,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567537921] [2022-11-20 09:34:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:14,321 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:14,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 09:34:14,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:34:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:14,654 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:14,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:16,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567537921] [2022-11-20 09:34:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567537921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:16,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:16,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:34:16,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077324507] [2022-11-20 09:34:16,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:16,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:34:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:34:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:34:16,838 INFO L87 Difference]: Start difference. First operand 1680 states and 6408 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:24,058 INFO L93 Difference]: Finished difference Result 2544 states and 9119 transitions. [2022-11-20 09:34:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:34:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:24,064 INFO L225 Difference]: With dead ends: 2544 [2022-11-20 09:34:24,064 INFO L226 Difference]: Without dead ends: 2544 [2022-11-20 09:34:24,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:34:24,065 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 160 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:24,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 134 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 889 Invalid, 0 Unknown, 475 Unchecked, 5.2s Time] [2022-11-20 09:34:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-20 09:34:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1763. [2022-11-20 09:34:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1758 states have (on average 3.7610921501706485) internal successors, (6612), 1762 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6612 transitions. [2022-11-20 09:34:24,102 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6612 transitions. Word has length 14 [2022-11-20 09:34:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:24,103 INFO L495 AbstractCegarLoop]: Abstraction has 1763 states and 6612 transitions. [2022-11-20 09:34:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6612 transitions. [2022-11-20 09:34:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:24,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:24,104 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:24,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:24,305 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1229576700, now seen corresponding path program 1 times [2022-11-20 09:34:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:24,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422953622] [2022-11-20 09:34:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:24,307 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:24,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 09:34:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:24,657 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:24,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:25,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:26,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422953622] [2022-11-20 09:34:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422953622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:26,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943111813] [2022-11-20 09:34:26,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:26,444 INFO L87 Difference]: Start difference. First operand 1763 states and 6612 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:29,503 INFO L93 Difference]: Finished difference Result 2365 states and 9066 transitions. [2022-11-20 09:34:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:29,510 INFO L225 Difference]: With dead ends: 2365 [2022-11-20 09:34:29,510 INFO L226 Difference]: Without dead ends: 2365 [2022-11-20 09:34:29,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:29,510 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:29,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 49 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 362 Invalid, 0 Unknown, 101 Unchecked, 2.5s Time] [2022-11-20 09:34:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2022-11-20 09:34:29,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2139. [2022-11-20 09:34:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2134 states have (on average 3.8767572633552017) internal successors, (8273), 2138 states have internal predecessors, (8273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 8273 transitions. [2022-11-20 09:34:29,561 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 8273 transitions. Word has length 15 [2022-11-20 09:34:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:29,561 INFO L495 AbstractCegarLoop]: Abstraction has 2139 states and 8273 transitions. [2022-11-20 09:34:29,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 8273 transitions. [2022-11-20 09:34:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:29,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:29,564 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:29,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:29,777 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1201871070, now seen corresponding path program 2 times [2022-11-20 09:34:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993471783] [2022-11-20 09:34:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:34:29,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:29,779 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:29,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 09:34:30,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:34:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:30,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:32,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:32,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993471783] [2022-11-20 09:34:32,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993471783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:32,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:32,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:32,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476518514] [2022-11-20 09:34:32,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:32,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:32,001 INFO L87 Difference]: Start difference. First operand 2139 states and 8273 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:34,532 INFO L93 Difference]: Finished difference Result 2340 states and 9118 transitions. [2022-11-20 09:34:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:34:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:34,539 INFO L225 Difference]: With dead ends: 2340 [2022-11-20 09:34:34,539 INFO L226 Difference]: Without dead ends: 2340 [2022-11-20 09:34:34,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:34,541 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:34,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 54 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 23 Unchecked, 1.8s Time] [2022-11-20 09:34:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2022-11-20 09:34:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2187. [2022-11-20 09:34:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2182 states have (on average 3.88955087076077) internal successors, (8487), 2186 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 8487 transitions. [2022-11-20 09:34:34,596 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 8487 transitions. Word has length 15 [2022-11-20 09:34:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:34,597 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 8487 transitions. [2022-11-20 09:34:34,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 8487 transitions. [2022-11-20 09:34:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:34,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:34,599 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:34,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:34,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:34,800 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:34,800 INFO L85 PathProgramCache]: Analyzing trace with hash -177357406, now seen corresponding path program 3 times [2022-11-20 09:34:34,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:34,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011845620] [2022-11-20 09:34:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:34:34,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:34,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:34,802 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:34,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 09:34:35,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:34:35,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:34:35,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:35,216 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:35,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:35,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:37,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011845620] [2022-11-20 09:34:37,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011845620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:37,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:37,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690146653] [2022-11-20 09:34:37,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:37,294 INFO L87 Difference]: Start difference. First operand 2187 states and 8487 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:38,806 INFO L93 Difference]: Finished difference Result 2357 states and 9240 transitions. [2022-11-20 09:34:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:38,813 INFO L225 Difference]: With dead ends: 2357 [2022-11-20 09:34:38,813 INFO L226 Difference]: Without dead ends: 2357 [2022-11-20 09:34:38,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:38,814 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:38,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 61 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 55 Unchecked, 0.9s Time] [2022-11-20 09:34:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-20 09:34:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2214. [2022-11-20 09:34:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2209 states have (on average 3.900860117700317) internal successors, (8617), 2213 states have internal predecessors, (8617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 8617 transitions. [2022-11-20 09:34:38,876 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 8617 transitions. Word has length 15 [2022-11-20 09:34:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:38,876 INFO L495 AbstractCegarLoop]: Abstraction has 2214 states and 8617 transitions. [2022-11-20 09:34:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 8617 transitions. [2022-11-20 09:34:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:38,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:38,879 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:38,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:39,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:39,093 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash 515283344, now seen corresponding path program 4 times [2022-11-20 09:34:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179083611] [2022-11-20 09:34:39,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:39,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:39,094 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:39,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 09:34:39,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:39,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:39,483 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:39,483 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 [2022-11-20 09:34:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:41,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179083611] [2022-11-20 09:34:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179083611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:41,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:41,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:41,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517954080] [2022-11-20 09:34:41,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:41,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:41,308 INFO L87 Difference]: Start difference. First operand 2214 states and 8617 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:44,763 INFO L93 Difference]: Finished difference Result 2585 states and 10202 transitions. [2022-11-20 09:34:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:44,770 INFO L225 Difference]: With dead ends: 2585 [2022-11-20 09:34:44,770 INFO L226 Difference]: Without dead ends: 2585 [2022-11-20 09:34:44,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:44,771 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:44,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 61 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 418 Invalid, 0 Unknown, 160 Unchecked, 2.7s Time] [2022-11-20 09:34:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-11-20 09:34:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2251. [2022-11-20 09:34:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2246 states have (on average 3.9154051647373107) internal successors, (8794), 2250 states have internal predecessors, (8794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 8794 transitions. [2022-11-20 09:34:44,823 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 8794 transitions. Word has length 15 [2022-11-20 09:34:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:44,823 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 8794 transitions. [2022-11-20 09:34:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 8794 transitions. [2022-11-20 09:34:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:44,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:44,825 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:44,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-20 09:34:45,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:45,026 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash -998053700, now seen corresponding path program 5 times [2022-11-20 09:34:45,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:45,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903909285] [2022-11-20 09:34:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:45,028 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:45,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 09:34:45,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:34:45,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:34:45,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:45,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:45,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:45,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:47,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903909285] [2022-11-20 09:34:47,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903909285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:47,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:47,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504698982] [2022-11-20 09:34:47,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:47,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:47,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:47,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:47,460 INFO L87 Difference]: Start difference. First operand 2251 states and 8794 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:50,139 INFO L93 Difference]: Finished difference Result 2357 states and 9242 transitions. [2022-11-20 09:34:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:34:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:50,147 INFO L225 Difference]: With dead ends: 2357 [2022-11-20 09:34:50,147 INFO L226 Difference]: Without dead ends: 2357 [2022-11-20 09:34:50,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:50,147 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:50,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 35 Unchecked, 1.6s Time] [2022-11-20 09:34:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-20 09:34:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2322. [2022-11-20 09:34:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2317 states have (on average 3.933534743202417) internal successors, (9114), 2321 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 9114 transitions. [2022-11-20 09:34:50,200 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 9114 transitions. Word has length 15 [2022-11-20 09:34:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:50,200 INFO L495 AbstractCegarLoop]: Abstraction has 2322 states and 9114 transitions. [2022-11-20 09:34:50,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 9114 transitions. [2022-11-20 09:34:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:50,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:50,202 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:50,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-20 09:34:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:50,403 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -804114290, now seen corresponding path program 6 times [2022-11-20 09:34:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:50,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387859299] [2022-11-20 09:34:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:34:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:50,405 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:50,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 09:34:50,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:34:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:50,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:50,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:51,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:52,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387859299] [2022-11-20 09:34:52,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387859299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:52,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:52,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958838742] [2022-11-20 09:34:52,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:52,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:52,805 INFO L87 Difference]: Start difference. First operand 2322 states and 9114 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:54,255 INFO L93 Difference]: Finished difference Result 2450 states and 9700 transitions. [2022-11-20 09:34:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:34:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:54,263 INFO L225 Difference]: With dead ends: 2450 [2022-11-20 09:34:54,263 INFO L226 Difference]: Without dead ends: 2450 [2022-11-20 09:34:54,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:54,263 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:54,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 129 Unchecked, 0.9s Time] [2022-11-20 09:34:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2022-11-20 09:34:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2405. [2022-11-20 09:34:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2400 states have (on average 3.9720833333333334) internal successors, (9533), 2404 states have internal predecessors, (9533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 9533 transitions. [2022-11-20 09:34:54,330 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 9533 transitions. Word has length 15 [2022-11-20 09:34:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:54,331 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 9533 transitions. [2022-11-20 09:34:54,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 9533 transitions. [2022-11-20 09:34:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:54,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:54,334 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:54,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:54,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:54,548 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:54,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:54,548 INFO L85 PathProgramCache]: Analyzing trace with hash -601856787, now seen corresponding path program 1 times [2022-11-20 09:34:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354827975] [2022-11-20 09:34:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:54,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:54,549 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:54,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 09:34:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:54,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:54,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:55,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:56,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:56,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354827975] [2022-11-20 09:34:56,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354827975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:56,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:56,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:56,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233032229] [2022-11-20 09:34:56,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:56,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:34:56,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:34:56,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:56,874 INFO L87 Difference]: Start difference. First operand 2405 states and 9533 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:59,019 INFO L93 Difference]: Finished difference Result 2493 states and 9879 transitions. [2022-11-20 09:34:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:34:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:59,027 INFO L225 Difference]: With dead ends: 2493 [2022-11-20 09:34:59,027 INFO L226 Difference]: Without dead ends: 2493 [2022-11-20 09:34:59,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:34:59,027 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:59,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 56 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 0 Unknown, 19 Unchecked, 1.4s Time] [2022-11-20 09:34:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-20 09:34:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2445. [2022-11-20 09:34:59,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2445 states, 2440 states have (on average 3.969672131147541) internal successors, (9686), 2444 states have internal predecessors, (9686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 9686 transitions. [2022-11-20 09:34:59,097 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 9686 transitions. Word has length 15 [2022-11-20 09:34:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:59,097 INFO L495 AbstractCegarLoop]: Abstraction has 2445 states and 9686 transitions. [2022-11-20 09:34:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 9686 transitions. [2022-11-20 09:34:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:59,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:59,100 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:59,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-20 09:34:59,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:59,300 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:34:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash -458711032, now seen corresponding path program 1 times [2022-11-20 09:34:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:59,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660092351] [2022-11-20 09:34:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:59,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:59,303 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:59,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 09:34:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:59,656 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:59,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:00,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:01,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:01,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660092351] [2022-11-20 09:35:01,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660092351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:01,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:01,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:35:01,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218341131] [2022-11-20 09:35:01,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:01,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:35:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:01,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:35:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:35:01,590 INFO L87 Difference]: Start difference. First operand 2445 states and 9686 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:03,980 INFO L93 Difference]: Finished difference Result 2561 states and 10105 transitions. [2022-11-20 09:35:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:35:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:03,987 INFO L225 Difference]: With dead ends: 2561 [2022-11-20 09:35:03,987 INFO L226 Difference]: Without dead ends: 2561 [2022-11-20 09:35:03,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:35:03,988 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:03,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 63 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 218 Invalid, 0 Unknown, 75 Unchecked, 1.6s Time] [2022-11-20 09:35:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-11-20 09:35:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2477. [2022-11-20 09:35:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2472 states have (on average 3.960760517799353) internal successors, (9791), 2476 states have internal predecessors, (9791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 9791 transitions. [2022-11-20 09:35:04,072 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 9791 transitions. Word has length 15 [2022-11-20 09:35:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:04,072 INFO L495 AbstractCegarLoop]: Abstraction has 2477 states and 9791 transitions. [2022-11-20 09:35:04,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 9791 transitions. [2022-11-20 09:35:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:35:04,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:04,075 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:04,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:04,288 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -675592891, now seen corresponding path program 2 times [2022-11-20 09:35:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434795021] [2022-11-20 09:35:04,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:04,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:04,290 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 09:35:04,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:04,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:35:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:04,665 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:04,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:05,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:06,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:06,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434795021] [2022-11-20 09:35:06,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434795021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:06,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:06,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:35:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422480108] [2022-11-20 09:35:06,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:35:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:35:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:35:06,470 INFO L87 Difference]: Start difference. First operand 2477 states and 9791 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:08,386 INFO L93 Difference]: Finished difference Result 2519 states and 9950 transitions. [2022-11-20 09:35:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:35:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:08,394 INFO L225 Difference]: With dead ends: 2519 [2022-11-20 09:35:08,394 INFO L226 Difference]: Without dead ends: 2519 [2022-11-20 09:35:08,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:35:08,395 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:08,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 60 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 61 Unchecked, 1.1s Time] [2022-11-20 09:35:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2022-11-20 09:35:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 2510. [2022-11-20 09:35:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2505 states have (on average 3.9584830339321355) internal successors, (9916), 2509 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 9916 transitions. [2022-11-20 09:35:08,471 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 9916 transitions. Word has length 15 [2022-11-20 09:35:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 2510 states and 9916 transitions. [2022-11-20 09:35:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 9916 transitions. [2022-11-20 09:35:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:35:08,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:08,475 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:08,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-20 09:35:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:08,675 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -532447136, now seen corresponding path program 2 times [2022-11-20 09:35:08,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:08,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100714556] [2022-11-20 09:35:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:08,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:08,677 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:08,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 09:35:08,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:08,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:08,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:35:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:09,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:09,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:09,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:10,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100714556] [2022-11-20 09:35:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100714556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:10,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:10,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:35:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304277202] [2022-11-20 09:35:10,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:35:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:10,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:35:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:35:10,903 INFO L87 Difference]: Start difference. First operand 2510 states and 9916 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:12,891 INFO L93 Difference]: Finished difference Result 2552 states and 10075 transitions. [2022-11-20 09:35:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:35:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:12,899 INFO L225 Difference]: With dead ends: 2552 [2022-11-20 09:35:12,899 INFO L226 Difference]: Without dead ends: 2552 [2022-11-20 09:35:12,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:35:12,899 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:12,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 51 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 19 Unchecked, 1.2s Time] [2022-11-20 09:35:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-11-20 09:35:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2543. [2022-11-20 09:35:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2538 states have (on average 3.9562647754137115) internal successors, (10041), 2542 states have internal predecessors, (10041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 10041 transitions. [2022-11-20 09:35:12,970 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 10041 transitions. Word has length 15 [2022-11-20 09:35:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:12,970 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 10041 transitions. [2022-11-20 09:35:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:12,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 10041 transitions. [2022-11-20 09:35:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:35:12,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:12,974 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:12,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:13,187 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -486354564, now seen corresponding path program 5 times [2022-11-20 09:35:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904363377] [2022-11-20 09:35:13,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:35:13,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:13,190 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:13,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 09:35:13,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 09:35:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:35:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:13,582 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:13,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:14,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:16,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:16,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904363377] [2022-11-20 09:35:16,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904363377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:16,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:16,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-20 09:35:16,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663616934] [2022-11-20 09:35:16,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:16,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:35:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:35:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:35:16,012 INFO L87 Difference]: Start difference. First operand 2543 states and 10041 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:26,863 INFO L93 Difference]: Finished difference Result 4289 states and 16108 transitions. [2022-11-20 09:35:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:35:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:26,875 INFO L225 Difference]: With dead ends: 4289 [2022-11-20 09:35:26,875 INFO L226 Difference]: Without dead ends: 4289 [2022-11-20 09:35:26,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:35:26,876 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 379 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:26,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 133 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1145 Invalid, 0 Unknown, 199 Unchecked, 8.2s Time] [2022-11-20 09:35:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-11-20 09:35:26,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 2746. [2022-11-20 09:35:26,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2741 states have (on average 4.002188982123313) internal successors, (10970), 2745 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 10970 transitions. [2022-11-20 09:35:26,965 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 10970 transitions. Word has length 15 [2022-11-20 09:35:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:26,966 INFO L495 AbstractCegarLoop]: Abstraction has 2746 states and 10970 transitions. [2022-11-20 09:35:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 10970 transitions. [2022-11-20 09:35:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:35:26,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:26,968 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:26,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-20 09:35:27,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:27,171 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:27,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1954482517, now seen corresponding path program 5 times [2022-11-20 09:35:27,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:27,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581831681] [2022-11-20 09:35:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:35:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:27,173 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:27,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 09:35:27,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:35:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:35:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:27,546 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:27,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:27,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:29,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:29,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581831681] [2022-11-20 09:35:29,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581831681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:29,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:29,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:35:29,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330419132] [2022-11-20 09:35:29,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:29,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:35:29,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:29,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:35:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:35:29,853 INFO L87 Difference]: Start difference. First operand 2746 states and 10970 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:42,585 INFO L93 Difference]: Finished difference Result 4740 states and 17707 transitions. [2022-11-20 09:35:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:35:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:42,599 INFO L225 Difference]: With dead ends: 4740 [2022-11-20 09:35:42,599 INFO L226 Difference]: Without dead ends: 4740 [2022-11-20 09:35:42,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:35:42,600 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 561 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:42,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 140 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 978 Invalid, 0 Unknown, 452 Unchecked, 7.0s Time] [2022-11-20 09:35:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2022-11-20 09:35:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 2124. [2022-11-20 09:35:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2119 states have (on average 3.746578574799434) internal successors, (7939), 2123 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 7939 transitions. [2022-11-20 09:35:42,686 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 7939 transitions. Word has length 15 [2022-11-20 09:35:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:42,686 INFO L495 AbstractCegarLoop]: Abstraction has 2124 states and 7939 transitions. [2022-11-20 09:35:42,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 7939 transitions. [2022-11-20 09:35:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:35:42,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:42,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:42,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:42,902 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 401576643, now seen corresponding path program 3 times [2022-11-20 09:35:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835393741] [2022-11-20 09:35:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:35:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:42,904 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:42,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 09:35:43,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:35:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:43,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:35:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:43,360 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:43,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:35:43,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:35:45,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:45,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835393741] [2022-11-20 09:35:45,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835393741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:45,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:45,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:35:45,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874139831] [2022-11-20 09:35:45,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:45,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:35:45,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:35:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:35:45,180 INFO L87 Difference]: Start difference. First operand 2124 states and 7939 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:54,214 INFO L93 Difference]: Finished difference Result 4513 states and 16152 transitions. [2022-11-20 09:35:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:35:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:35:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:54,226 INFO L225 Difference]: With dead ends: 4513 [2022-11-20 09:35:54,226 INFO L226 Difference]: Without dead ends: 4513 [2022-11-20 09:35:54,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:35:54,227 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 816 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:54,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 36 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 09:35:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2022-11-20 09:35:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 2297. [2022-11-20 09:35:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2292 states have (on average 3.9576788830715532) internal successors, (9071), 2296 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 9071 transitions. [2022-11-20 09:35:54,283 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 9071 transitions. Word has length 15 [2022-11-20 09:35:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:54,283 INFO L495 AbstractCegarLoop]: Abstraction has 2297 states and 9071 transitions. [2022-11-20 09:35:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 9071 transitions. [2022-11-20 09:35:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:35:54,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:54,286 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:54,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 09:35:54,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:54,486 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:35:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash -633583114, now seen corresponding path program 6 times [2022-11-20 09:35:54,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:54,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515581710] [2022-11-20 09:35:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:54,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:54,488 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:54,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 09:35:54,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:35:54,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:35:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:54,996 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:54,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:35:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:35:58,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:58,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515581710] [2022-11-20 09:35:58,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515581710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:58,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:58,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 09:35:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192932345] [2022-11-20 09:35:58,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:58,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:35:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:35:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:35:58,270 INFO L87 Difference]: Start difference. First operand 2297 states and 9071 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:13,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:13,514 INFO L93 Difference]: Finished difference Result 2405 states and 9351 transitions. [2022-11-20 09:36:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:36:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 09:36:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:13,522 INFO L225 Difference]: With dead ends: 2405 [2022-11-20 09:36:13,522 INFO L226 Difference]: Without dead ends: 2405 [2022-11-20 09:36:13,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:36:13,522 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:13,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-11-20 09:36:13,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-11-20 09:36:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2314. [2022-11-20 09:36:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2309 states have (on average 3.9480294499783457) internal successors, (9116), 2313 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 9116 transitions. [2022-11-20 09:36:13,597 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 9116 transitions. Word has length 19 [2022-11-20 09:36:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:13,598 INFO L495 AbstractCegarLoop]: Abstraction has 2314 states and 9116 transitions. [2022-11-20 09:36:13,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 9116 transitions. [2022-11-20 09:36:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 09:36:13,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:13,602 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:13,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:13,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:13,816 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:36:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash -90608370, now seen corresponding path program 4 times [2022-11-20 09:36:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:13,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557567450] [2022-11-20 09:36:13,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:13,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:13,818 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:13,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 09:36:14,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:14,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:36:14,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:14,293 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:14,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:36:15,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:21,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557567450] [2022-11-20 09:36:21,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557567450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:21,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:21,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:36:21,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890479594] [2022-11-20 09:36:21,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:36:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:36:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:36:21,104 INFO L87 Difference]: Start difference. First operand 2314 states and 9116 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:43,597 INFO L93 Difference]: Finished difference Result 5208 states and 19465 transitions. [2022-11-20 09:36:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 09:36:43,599 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 09:36:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:43,613 INFO L225 Difference]: With dead ends: 5208 [2022-11-20 09:36:43,613 INFO L226 Difference]: Without dead ends: 5208 [2022-11-20 09:36:43,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 09:36:43,614 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 393 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:43,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 266 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2240 Invalid, 0 Unknown, 325 Unchecked, 17.2s Time] [2022-11-20 09:36:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2022-11-20 09:36:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 2900. [2022-11-20 09:36:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2895 states have (on average 4.147150259067358) internal successors, (12006), 2899 states have internal predecessors, (12006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 12006 transitions. [2022-11-20 09:36:43,707 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 12006 transitions. Word has length 20 [2022-11-20 09:36:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:43,707 INFO L495 AbstractCegarLoop]: Abstraction has 2900 states and 12006 transitions. [2022-11-20 09:36:43,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 12006 transitions. [2022-11-20 09:36:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 09:36:43,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:43,711 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:43,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 09:36:43,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:43,911 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:36:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1494593638, now seen corresponding path program 5 times [2022-11-20 09:36:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399509877] [2022-11-20 09:36:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:36:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:43,913 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:43,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 09:36:44,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 09:36:44,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 09:36:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:44,474 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:44,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:36:45,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:51,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:51,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399509877] [2022-11-20 09:36:51,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399509877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:51,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:51,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:36:51,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764578246] [2022-11-20 09:36:51,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:36:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:36:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:36:51,285 INFO L87 Difference]: Start difference. First operand 2900 states and 12006 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:23,754 INFO L93 Difference]: Finished difference Result 10489 states and 42838 transitions. [2022-11-20 09:37:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 09:37:23,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 09:37:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:23,788 INFO L225 Difference]: With dead ends: 10489 [2022-11-20 09:37:23,788 INFO L226 Difference]: Without dead ends: 10489 [2022-11-20 09:37:23,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 09:37:23,789 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 683 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 272 Invalid, 3702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2909 Invalid, 0 Unknown, 778 Unchecked, 22.8s Time] [2022-11-20 09:37:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10489 states. [2022-11-20 09:37:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10489 to 4987. [2022-11-20 09:37:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4982 states have (on average 4.324167001204335) internal successors, (21543), 4986 states have internal predecessors, (21543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 21543 transitions. [2022-11-20 09:37:23,954 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 21543 transitions. Word has length 20 [2022-11-20 09:37:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:23,955 INFO L495 AbstractCegarLoop]: Abstraction has 4987 states and 21543 transitions. [2022-11-20 09:37:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 21543 transitions. [2022-11-20 09:37:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 09:37:23,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:23,959 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:23,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:24,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:24,159 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:37:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 227136460, now seen corresponding path program 6 times [2022-11-20 09:37:24,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:24,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315861459] [2022-11-20 09:37:24,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:37:24,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:24,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:24,161 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:37:24,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 09:37:24,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:37:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:37:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:24,751 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:24,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:37:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:37:28,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315861459] [2022-11-20 09:37:28,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315861459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:28,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:28,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 09:37:28,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971850137] [2022-11-20 09:37:28,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:28,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:37:28,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:37:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:37:28,747 INFO L87 Difference]: Start difference. First operand 4987 states and 21543 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:42,668 INFO L93 Difference]: Finished difference Result 5145 states and 21982 transitions. [2022-11-20 09:37:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:37:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 09:37:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:42,684 INFO L225 Difference]: With dead ends: 5145 [2022-11-20 09:37:42,685 INFO L226 Difference]: Without dead ends: 5145 [2022-11-20 09:37:42,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:37:42,685 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:42,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 73 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2022-11-20 09:37:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2022-11-20 09:37:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 4973. [2022-11-20 09:37:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4968 states have (on average 4.32024959742351) internal successors, (21463), 4972 states have internal predecessors, (21463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 21463 transitions. [2022-11-20 09:37:42,827 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 21463 transitions. Word has length 20 [2022-11-20 09:37:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:42,828 INFO L495 AbstractCegarLoop]: Abstraction has 4973 states and 21463 transitions. [2022-11-20 09:37:42,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 21463 transitions. [2022-11-20 09:37:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 09:37:42,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:42,832 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:42,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 09:37:43,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:43,033 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:37:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1494517572, now seen corresponding path program 4 times [2022-11-20 09:37:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:43,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90256801] [2022-11-20 09:37:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:37:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:43,035 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:37:43,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 09:37:43,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:37:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:37:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:43,542 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:43,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:37:44,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:50,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:50,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90256801] [2022-11-20 09:37:50,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90256801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:50,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:50,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:37:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695617798] [2022-11-20 09:37:50,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:50,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:37:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:37:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:37:50,312 INFO L87 Difference]: Start difference. First operand 4973 states and 21463 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:43,721 INFO L93 Difference]: Finished difference Result 7857 states and 30333 transitions. [2022-11-20 09:38:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 09:38:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 09:38:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:43,743 INFO L225 Difference]: With dead ends: 7857 [2022-11-20 09:38:43,743 INFO L226 Difference]: Without dead ends: 7857 [2022-11-20 09:38:43,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=510, Invalid=3150, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 09:38:43,744 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1527 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 5336 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 6588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1238 IncrementalHoareTripleChecker+Unchecked, 43.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:43,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1527 Valid, 499 Invalid, 6588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 5336 Invalid, 0 Unknown, 1238 Unchecked, 43.2s Time] [2022-11-20 09:38:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2022-11-20 09:38:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 5609. [2022-11-20 09:38:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5604 states have (on average 4.296038543897216) internal successors, (24075), 5608 states have internal predecessors, (24075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 24075 transitions. [2022-11-20 09:38:43,861 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 24075 transitions. Word has length 20 [2022-11-20 09:38:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:43,861 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 24075 transitions. [2022-11-20 09:38:43,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:43,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 24075 transitions. [2022-11-20 09:38:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:38:43,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:43,867 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:43,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-20 09:38:44,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:44,067 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:38:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash 711616424, now seen corresponding path program 1 times [2022-11-20 09:38:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:44,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292389010] [2022-11-20 09:38:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:44,069 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:38:44,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 09:38:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:44,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:38:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:44,586 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:44,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:38:45,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:51,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:51,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292389010] [2022-11-20 09:38:51,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292389010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:51,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:51,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:38:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595719386] [2022-11-20 09:38:51,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:38:51,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:51,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:38:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:38:51,544 INFO L87 Difference]: Start difference. First operand 5609 states and 24075 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:20,915 INFO L93 Difference]: Finished difference Result 7179 states and 27932 transitions. [2022-11-20 09:39:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:39:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 09:39:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:20,942 INFO L225 Difference]: With dead ends: 7179 [2022-11-20 09:39:20,942 INFO L226 Difference]: Without dead ends: 7179 [2022-11-20 09:39:20,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 09:39:20,943 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 458 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 2830 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1215 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:20,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 298 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2830 Invalid, 0 Unknown, 1215 Unchecked, 22.9s Time] [2022-11-20 09:39:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-11-20 09:39:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 3915. [2022-11-20 09:39:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3910 states have (on average 4.099744245524296) internal successors, (16030), 3914 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16030 transitions. [2022-11-20 09:39:21,095 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16030 transitions. Word has length 21 [2022-11-20 09:39:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:21,095 INFO L495 AbstractCegarLoop]: Abstraction has 3915 states and 16030 transitions. [2022-11-20 09:39:21,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16030 transitions. [2022-11-20 09:39:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:39:21,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:21,102 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:21,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:21,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:21,302 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:39:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:21,303 INFO L85 PathProgramCache]: Analyzing trace with hash 12384818, now seen corresponding path program 2 times [2022-11-20 09:39:21,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:21,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607592851] [2022-11-20 09:39:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:39:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:21,304 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:39:21,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 09:39:21,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:39:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:21,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:39:21,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:21,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:21,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:39:23,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:28,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:28,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607592851] [2022-11-20 09:39:28,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607592851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:28,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:28,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:39:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466968013] [2022-11-20 09:39:28,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:39:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:39:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:39:28,765 INFO L87 Difference]: Start difference. First operand 3915 states and 16030 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:11,514 INFO L93 Difference]: Finished difference Result 8479 states and 32082 transitions. [2022-11-20 09:40:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 09:40:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 09:40:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:11,537 INFO L225 Difference]: With dead ends: 8479 [2022-11-20 09:40:11,537 INFO L226 Difference]: Without dead ends: 8479 [2022-11-20 09:40:11,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 09:40:11,538 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1322 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 4687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1140 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:11,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 327 Invalid, 4687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3533 Invalid, 0 Unknown, 1140 Unchecked, 29.2s Time] [2022-11-20 09:40:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2022-11-20 09:40:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 3354. [2022-11-20 09:40:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3349 states have (on average 3.971036130188116) internal successors, (13299), 3353 states have internal predecessors, (13299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 13299 transitions. [2022-11-20 09:40:11,626 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 13299 transitions. Word has length 21 [2022-11-20 09:40:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:11,627 INFO L495 AbstractCegarLoop]: Abstraction has 3354 states and 13299 transitions. [2022-11-20 09:40:11,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 13299 transitions. [2022-11-20 09:40:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:40:11,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:11,633 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:11,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-20 09:40:11,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:11,834 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:40:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash 11020534, now seen corresponding path program 6 times [2022-11-20 09:40:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725488819] [2022-11-20 09:40:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:40:11,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:11,836 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:40:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 09:40:12,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:40:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:40:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:12,492 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:12,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:40:13,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:40:16,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:16,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725488819] [2022-11-20 09:40:16,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725488819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:16,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:16,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 09:40:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047043307] [2022-11-20 09:40:16,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:16,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:40:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:40:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:40:16,253 INFO L87 Difference]: Start difference. First operand 3354 states and 13299 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:21,714 INFO L93 Difference]: Finished difference Result 3514 states and 13715 transitions. [2022-11-20 09:40:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:40:21,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 09:40:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:21,725 INFO L225 Difference]: With dead ends: 3514 [2022-11-20 09:40:21,725 INFO L226 Difference]: Without dead ends: 3514 [2022-11-20 09:40:21,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:40:21,725 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:21,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-11-20 09:40:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2022-11-20 09:40:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3356. [2022-11-20 09:40:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3351 states have (on average 3.969262906595046) internal successors, (13301), 3355 states have internal predecessors, (13301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 13301 transitions. [2022-11-20 09:40:21,794 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 13301 transitions. Word has length 21 [2022-11-20 09:40:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 3356 states and 13301 transitions. [2022-11-20 09:40:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 13301 transitions. [2022-11-20 09:40:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:40:21,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:21,798 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:21,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 09:40:21,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:21,999 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:40:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash 964717162, now seen corresponding path program 3 times [2022-11-20 09:40:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:22,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595308526] [2022-11-20 09:40:22,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:40:22,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:22,001 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:40:22,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 09:40:22,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:40:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:22,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:40:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:22,778 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:22,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:40:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:40:23,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:40:24,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:24,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595308526] [2022-11-20 09:40:24,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595308526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:24,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:24,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-20 09:40:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156668826] [2022-11-20 09:40:24,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:40:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:40:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:40:24,475 INFO L87 Difference]: Start difference. First operand 3356 states and 13301 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:31,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:31,467 INFO L93 Difference]: Finished difference Result 4415 states and 16549 transitions. [2022-11-20 09:40:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:40:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 09:40:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:31,504 INFO L225 Difference]: With dead ends: 4415 [2022-11-20 09:40:31,504 INFO L226 Difference]: Without dead ends: 4415 [2022-11-20 09:40:31,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:40:31,505 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 665 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:31,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 144 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-20 09:40:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2022-11-20 09:40:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 3164. [2022-11-20 09:40:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3159 states have (on average 3.922127255460589) internal successors, (12390), 3163 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 12390 transitions. [2022-11-20 09:40:31,563 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 12390 transitions. Word has length 21 [2022-11-20 09:40:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:31,563 INFO L495 AbstractCegarLoop]: Abstraction has 3164 states and 12390 transitions. [2022-11-20 09:40:31,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 12390 transitions. [2022-11-20 09:40:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:40:31,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:31,567 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2022-11-20 09:40:31,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-20 09:40:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:31,767 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:40:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:31,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1485447475, now seen corresponding path program 5 times [2022-11-20 09:40:31,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346963299] [2022-11-20 09:40:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:31,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:31,769 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:40:31,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 09:40:32,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 09:40:32,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:40:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:32,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:32,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:40:33,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:41,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:41,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346963299] [2022-11-20 09:40:41,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346963299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:41,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:41,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 35 [2022-11-20 09:40:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472491423] [2022-11-20 09:40:41,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:41,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 09:40:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 09:40:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:40:41,287 INFO L87 Difference]: Start difference. First operand 3164 states and 12390 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:57,519 INFO L93 Difference]: Finished difference Result 11149 states and 41837 transitions. [2022-11-20 09:41:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 09:41:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 09:41:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:57,550 INFO L225 Difference]: With dead ends: 11149 [2022-11-20 09:41:57,550 INFO L226 Difference]: Without dead ends: 11149 [2022-11-20 09:41:57,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=672, Invalid=4878, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 09:41:57,551 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 892 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 5720 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 6137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:57,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 448 Invalid, 6137 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 5720 Invalid, 0 Unknown, 393 Unchecked, 44.2s Time] [2022-11-20 09:41:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2022-11-20 09:41:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 3358. [2022-11-20 09:41:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3358 states, 3353 states have (on average 3.931702952579779) internal successors, (13183), 3357 states have internal predecessors, (13183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 13183 transitions. [2022-11-20 09:41:57,666 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 13183 transitions. Word has length 21 [2022-11-20 09:41:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:57,666 INFO L495 AbstractCegarLoop]: Abstraction has 3358 states and 13183 transitions. [2022-11-20 09:41:57,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 13183 transitions. [2022-11-20 09:41:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:41:57,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:57,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:57,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:57,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:57,871 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:41:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1086444266, now seen corresponding path program 1 times [2022-11-20 09:41:57,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:57,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452139172] [2022-11-20 09:41:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:57,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:57,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:57,872 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:57,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 09:41:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:41:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:58,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:41:58,229 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 63 treesize of output 19 [2022-11-20 09:41:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:41:58,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:41:58,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:58,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452139172] [2022-11-20 09:41:58,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452139172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:41:58,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:41:58,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:41:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755387978] [2022-11-20 09:41:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:41:58,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:41:58,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:41:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:41:58,430 INFO L87 Difference]: Start difference. First operand 3358 states and 13183 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:58,672 INFO L93 Difference]: Finished difference Result 4287 states and 16440 transitions. [2022-11-20 09:41:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:41:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 22 [2022-11-20 09:41:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:58,692 INFO L225 Difference]: With dead ends: 4287 [2022-11-20 09:41:58,693 INFO L226 Difference]: Without dead ends: 4244 [2022-11-20 09:41:58,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:41:58,693 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:58,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 09:41:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-11-20 09:41:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 4140. [2022-11-20 09:41:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 4135 states have (on average 3.8287787182587665) internal successors, (15832), 4139 states have internal predecessors, (15832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 15832 transitions. [2022-11-20 09:41:58,790 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 15832 transitions. Word has length 22 [2022-11-20 09:41:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:58,790 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 15832 transitions. [2022-11-20 09:41:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 15832 transitions. [2022-11-20 09:41:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:41:58,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:58,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:58,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-20 09:41:58,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:58,998 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:41:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash -568045180, now seen corresponding path program 2 times [2022-11-20 09:41:58,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:58,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550848649] [2022-11-20 09:41:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:41:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:58,999 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:59,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 09:41:59,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:41:59,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:59,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:41:59,313 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 63 treesize of output 19 [2022-11-20 09:41:59,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:41:59,524 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 160 treesize of output 55 [2022-11-20 09:42:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:42:00,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:02,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:42:02,197 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 145 treesize of output 40 [2022-11-20 09:42:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:42:04,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550848649] [2022-11-20 09:42:04,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550848649] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:42:04,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:42:04,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 09:42:04,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743146593] [2022-11-20 09:42:04,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:42:04,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:42:04,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:04,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:42:04,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-11-20 09:42:04,466 INFO L87 Difference]: Start difference. First operand 4140 states and 15832 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:06,833 INFO L93 Difference]: Finished difference Result 4139 states and 15831 transitions. [2022-11-20 09:42:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:42:06,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 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 22 [2022-11-20 09:42:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:06,844 INFO L225 Difference]: With dead ends: 4139 [2022-11-20 09:42:06,844 INFO L226 Difference]: Without dead ends: 3963 [2022-11-20 09:42:06,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=19, Invalid=35, Unknown=2, NotChecked=0, Total=56 [2022-11-20 09:42:06,845 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:06,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:42:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2022-11-20 09:42:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3143. [2022-11-20 09:42:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3139 states have (on average 3.6664542848040775) internal successors, (11509), 3142 states have internal predecessors, (11509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 11509 transitions. [2022-11-20 09:42:06,959 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 11509 transitions. Word has length 22 [2022-11-20 09:42:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:06,959 INFO L495 AbstractCegarLoop]: Abstraction has 3143 states and 11509 transitions. [2022-11-20 09:42:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 11509 transitions. [2022-11-20 09:42:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:06,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:06,965 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:06,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-20 09:42:07,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:07,178 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:07,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1538398993, now seen corresponding path program 7 times [2022-11-20 09:42:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:07,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185690854] [2022-11-20 09:42:07,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:42:07,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:07,180 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:07,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 09:42:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:42:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:42:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:07,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:42:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:42:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:42:08,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:42:13,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:13,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185690854] [2022-11-20 09:42:13,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185690854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:13,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:42:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2022-11-20 09:42:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275698188] [2022-11-20 09:42:13,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:42:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:42:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:42:13,953 INFO L87 Difference]: Start difference. First operand 3143 states and 11509 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:18,240 INFO L93 Difference]: Finished difference Result 3242 states and 11792 transitions. [2022-11-20 09:42:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 09:42:18,241 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:42:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:18,252 INFO L225 Difference]: With dead ends: 3242 [2022-11-20 09:42:18,252 INFO L226 Difference]: Without dead ends: 3242 [2022-11-20 09:42:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:42:18,253 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:18,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 78 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 40 Unchecked, 2.8s Time] [2022-11-20 09:42:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2022-11-20 09:42:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3225. [2022-11-20 09:42:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3221 states have (on average 3.6494877367277243) internal successors, (11755), 3224 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 11755 transitions. [2022-11-20 09:42:18,350 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 11755 transitions. Word has length 22 [2022-11-20 09:42:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:18,351 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 11755 transitions. [2022-11-20 09:42:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 11755 transitions. [2022-11-20 09:42:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:18,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:18,356 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:18,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-20 09:42:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:18,570 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1960884719, now seen corresponding path program 8 times [2022-11-20 09:42:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:18,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059252596] [2022-11-20 09:42:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:42:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:18,572 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:18,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 09:42:18,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:42:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:42:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:19,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:42:19,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:42:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:42:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:42:24,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:24,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059252596] [2022-11-20 09:42:24,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059252596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:24,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:42:24,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2022-11-20 09:42:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922892658] [2022-11-20 09:42:24,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:24,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:42:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:42:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:42:24,923 INFO L87 Difference]: Start difference. First operand 3225 states and 11755 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:29,548 INFO L93 Difference]: Finished difference Result 3302 states and 11951 transitions. [2022-11-20 09:42:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:42:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:42:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:29,561 INFO L225 Difference]: With dead ends: 3302 [2022-11-20 09:42:29,562 INFO L226 Difference]: Without dead ends: 3302 [2022-11-20 09:42:29,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:42:29,562 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:29,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 86 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 411 Invalid, 0 Unknown, 31 Unchecked, 3.5s Time] [2022-11-20 09:42:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2022-11-20 09:42:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3243. [2022-11-20 09:42:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 3239 states have (on average 3.6437171966656376) internal successors, (11802), 3242 states have internal predecessors, (11802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 11802 transitions. [2022-11-20 09:42:29,675 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 11802 transitions. Word has length 22 [2022-11-20 09:42:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:29,675 INFO L495 AbstractCegarLoop]: Abstraction has 3243 states and 11802 transitions. [2022-11-20 09:42:29,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 11802 transitions. [2022-11-20 09:42:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:29,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:29,681 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:29,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-20 09:42:29,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:29,896 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:29,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1049851611, now seen corresponding path program 9 times [2022-11-20 09:42:29,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:29,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850350378] [2022-11-20 09:42:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:42:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:29,898 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:29,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 09:42:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:42:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:42:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 09:42:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 09:42:30,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:30,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850350378] [2022-11-20 09:42:30,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850350378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:30,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:42:30,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 09:42:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165927485] [2022-11-20 09:42:30,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:42:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:30,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:42:30,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:42:30,848 INFO L87 Difference]: Start difference. First operand 3243 states and 11802 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:32,350 INFO L93 Difference]: Finished difference Result 3266 states and 11830 transitions. [2022-11-20 09:42:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:42:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:42:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:32,358 INFO L225 Difference]: With dead ends: 3266 [2022-11-20 09:42:32,358 INFO L226 Difference]: Without dead ends: 3131 [2022-11-20 09:42:32,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:42:32,359 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:32,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 27 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 09:42:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-20 09:42:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2022-11-20 09:42:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3127 states have (on average 3.683082826990726) internal successors, (11517), 3130 states have internal predecessors, (11517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 11517 transitions. [2022-11-20 09:42:32,453 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 11517 transitions. Word has length 22 [2022-11-20 09:42:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 11517 transitions. [2022-11-20 09:42:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 11517 transitions. [2022-11-20 09:42:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:32,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:32,491 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:32,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-20 09:42:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:32,691 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -191221138, now seen corresponding path program 4 times [2022-11-20 09:42:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486769288] [2022-11-20 09:42:32,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:42:32,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:32,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:32,694 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:32,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 09:42:32,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:42:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:42:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:33,186 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:42:33,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:42:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:42:34,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:42:39,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:39,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486769288] [2022-11-20 09:42:39,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486769288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:39,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:42:39,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 29 [2022-11-20 09:42:39,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546837276] [2022-11-20 09:42:39,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:39,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 09:42:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 09:42:39,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:42:39,938 INFO L87 Difference]: Start difference. First operand 3131 states and 11517 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:49,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:49,733 INFO L93 Difference]: Finished difference Result 3598 states and 13101 transitions. [2022-11-20 09:42:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 09:42:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:42:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:49,744 INFO L225 Difference]: With dead ends: 3598 [2022-11-20 09:42:49,745 INFO L226 Difference]: Without dead ends: 3598 [2022-11-20 09:42:49,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:42:49,745 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:49,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 182 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 749 Invalid, 0 Unknown, 66 Unchecked, 7.4s Time] [2022-11-20 09:42:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-11-20 09:42:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3374. [2022-11-20 09:42:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3370 states have (on average 3.727299703264095) internal successors, (12561), 3373 states have internal predecessors, (12561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 12561 transitions. [2022-11-20 09:42:49,806 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 12561 transitions. Word has length 22 [2022-11-20 09:42:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:49,806 INFO L495 AbstractCegarLoop]: Abstraction has 3374 states and 12561 transitions. [2022-11-20 09:42:49,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 12561 transitions. [2022-11-20 09:42:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:49,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:49,810 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:49,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-20 09:42:50,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:50,011 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -683400040, now seen corresponding path program 6 times [2022-11-20 09:42:50,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:50,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396292215] [2022-11-20 09:42:50,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:42:50,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:50,012 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 09:42:50,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 09:42:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:42:50,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:50,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:42:50,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:42:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 09:42:51,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 09:42:54,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:42:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396292215] [2022-11-20 09:42:54,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396292215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:54,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:42:54,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 09:42:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239070430] [2022-11-20 09:42:54,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:54,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:42:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:42:54,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:42:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:42:54,873 INFO L87 Difference]: Start difference. First operand 3374 states and 12561 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:55,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:55,169 INFO L93 Difference]: Finished difference Result 3372 states and 12549 transitions. [2022-11-20 09:42:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:42:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:42:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:55,178 INFO L225 Difference]: With dead ends: 3372 [2022-11-20 09:42:55,178 INFO L226 Difference]: Without dead ends: 3372 [2022-11-20 09:42:55,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:42:55,179 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:55,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 09:42:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2022-11-20 09:42:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3370. [2022-11-20 09:42:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3366 states have (on average 3.7263814616755795) internal successors, (12543), 3369 states have internal predecessors, (12543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 12543 transitions. [2022-11-20 09:42:55,280 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 12543 transitions. Word has length 22 [2022-11-20 09:42:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:55,281 INFO L495 AbstractCegarLoop]: Abstraction has 3370 states and 12543 transitions. [2022-11-20 09:42:55,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:42:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 12543 transitions. [2022-11-20 09:42:55,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:42:55,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:55,284 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:55,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 09:42:55,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:55,484 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:42:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash 317708642, now seen corresponding path program 5 times [2022-11-20 09:42:55,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:42:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049406892] [2022-11-20 09:42:55,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:42:55,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:42:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:42:55,486 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:42:55,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 09:42:55,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 09:42:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 09:42:55,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:56,095 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:42:56,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:42:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:42:57,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:43:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:43:03,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:43:03,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049406892] [2022-11-20 09:43:03,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049406892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:43:03,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:43:03,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:43:03,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145542803] [2022-11-20 09:43:03,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:43:03,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:43:03,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:43:03,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:43:03,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:43:03,229 INFO L87 Difference]: Start difference. First operand 3370 states and 12543 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:43:42,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:43:55,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:43:55,254 INFO L93 Difference]: Finished difference Result 6720 states and 23287 transitions. [2022-11-20 09:43:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 09:43:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:43:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:43:55,276 INFO L225 Difference]: With dead ends: 6720 [2022-11-20 09:43:55,276 INFO L226 Difference]: Without dead ends: 6720 [2022-11-20 09:43:55,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 09:43:55,277 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 569 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:43:55,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 417 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2775 Invalid, 0 Unknown, 599 Unchecked, 28.1s Time] [2022-11-20 09:43:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2022-11-20 09:43:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 3657. [2022-11-20 09:43:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3653 states have (on average 3.6663016698603887) internal successors, (13393), 3656 states have internal predecessors, (13393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:43:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 13393 transitions. [2022-11-20 09:43:55,377 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 13393 transitions. Word has length 22 [2022-11-20 09:43:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:43:55,378 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 13393 transitions. [2022-11-20 09:43:55,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:43:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 13393 transitions. [2022-11-20 09:43:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:43:55,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:43:55,382 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:43:55,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 09:43:55,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:43:55,582 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:43:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:43:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1509579254, now seen corresponding path program 6 times [2022-11-20 09:43:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:43:55,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620009194] [2022-11-20 09:43:55,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:43:55,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:43:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:43:55,584 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:43:55,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 09:43:55,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:43:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:43:56,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:43:56,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:43:56,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:43:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:43:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 43 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:43:57,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:44:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:44:00,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:44:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620009194] [2022-11-20 09:44:00,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620009194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:44:00,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:44:00,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 09:44:00,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511950604] [2022-11-20 09:44:00,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:44:00,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:44:00,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:44:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:44:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:44:00,973 INFO L87 Difference]: Start difference. First operand 3657 states and 13393 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:44:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:44:10,648 INFO L93 Difference]: Finished difference Result 3721 states and 13443 transitions. [2022-11-20 09:44:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:44:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:44:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:44:10,660 INFO L225 Difference]: With dead ends: 3721 [2022-11-20 09:44:10,660 INFO L226 Difference]: Without dead ends: 3721 [2022-11-20 09:44:10,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:44:10,660 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:44:10,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-11-20 09:44:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-11-20 09:44:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3522. [2022-11-20 09:44:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3522 states, 3518 states have (on average 3.67708925525867) internal successors, (12936), 3521 states have internal predecessors, (12936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:44:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3522 states to 3522 states and 12936 transitions. [2022-11-20 09:44:10,725 INFO L78 Accepts]: Start accepts. Automaton has 3522 states and 12936 transitions. Word has length 22 [2022-11-20 09:44:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:44:10,725 INFO L495 AbstractCegarLoop]: Abstraction has 3522 states and 12936 transitions. [2022-11-20 09:44:10,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:44:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3522 states and 12936 transitions. [2022-11-20 09:44:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:44:10,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:44:10,729 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:44:10,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 09:44:10,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:44:10,932 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 09:44:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:44:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1969980788, now seen corresponding path program 7 times [2022-11-20 09:44:10,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:44:10,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62950873] [2022-11-20 09:44:10,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:44:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:44:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:44:10,933 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:44:10,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc6df6a-1e91-4523-8e41-805c95386436/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 09:44:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:44:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:44:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:44:11,564 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:44:11,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:44:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:44:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:44:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:44:19,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:44:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62950873] [2022-11-20 09:44:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62950873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:44:19,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:44:19,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-11-20 09:44:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501229659] [2022-11-20 09:44:19,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:44:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:44:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:44:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:44:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:44:19,142 INFO L87 Difference]: Start difference. First operand 3522 states and 12936 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:44:51,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []