./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/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_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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 09:31:30,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:31:30,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:31:30,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:31:30,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:31:30,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:31:30,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:31:30,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:31:30,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:31:30,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:31:30,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:31:30,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:31:30,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:31:30,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:31:30,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:31:30,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:31:30,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:31:30,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:31:30,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:31:30,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:31:30,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:31:30,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:31:30,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:31:30,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:31:30,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:31:30,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:31:30,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:31:30,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:31:30,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:31:30,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:31:30,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:31:30,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:31:30,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:31:30,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:31:30,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:31:30,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:31:30,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:31:30,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:31:30,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:31:30,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:31:30,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:31:30,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-20 09:31:30,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:31:30,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:31:30,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:31:30,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:31:30,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:31:30,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:31:30,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:31:30,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:31:30,810 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:31:30,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:31:30,811 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:31:30,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:31:30,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:31:30,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:31:30,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:31:30,812 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:31:30,812 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:31:30,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:31:30,813 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:31:30,813 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:31:30,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:31:30,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:31:30,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:31:30,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:31:30,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:30,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:31:30,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:31:30,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:31:30,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:31:30,816 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_fc22c523-09eb-448f-985b-d36940a365ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-20 09:31:31,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:31:31,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:31:31,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:31:31,200 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:31:31,201 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:31:31,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-20 09:31:34,240 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:31:34,498 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:31:34,499 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-20 09:31:34,509 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/5e0b83fb3/39c18283d1e94f178484a9b602f21570/FLAG3a4528a2b [2022-11-20 09:31:34,528 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/5e0b83fb3/39c18283d1e94f178484a9b602f21570 [2022-11-20 09:31:34,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:31:34,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:31:34,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:34,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:31:34,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:31:34,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:34" (1/1) ... [2022-11-20 09:31:34,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f1200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:34, skipping insertion in model container [2022-11-20 09:31:34,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:34" (1/1) ... [2022-11-20 09:31:34,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:31:34,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:31:34,779 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_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-20 09:31:34,809 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:34,812 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:34,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:34,853 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 09:31:34,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@664a000f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:34, skipping insertion in model container [2022-11-20 09:31:34,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:34,854 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 09:31:34,856 INFO L158 Benchmark]: Toolchain (without parser) took 322.88ms. Allocated memory is still 146.8MB. Free memory was 120.3MB in the beginning and 109.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:31:34,857 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 83.7MB in the beginning and 83.6MB in the end (delta: 79.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:31:34,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.54ms. Allocated memory is still 146.8MB. Free memory was 120.3MB in the beginning and 109.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:31:34,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 83.7MB in the beginning and 83.6MB in the end (delta: 79.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.54ms. Allocated memory is still 146.8MB. Free memory was 120.3MB in the beginning and 109.9MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/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_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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 09:31:37,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:31:37,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:31:37,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:31:37,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:31:37,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:31:37,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:31:37,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:31:37,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:31:37,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:31:37,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:31:37,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:31:37,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:31:37,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:31:37,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:31:37,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:31:37,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:31:37,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:31:37,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:31:37,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:31:37,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:31:37,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:31:37,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:31:37,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:31:37,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:31:37,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:31:37,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:31:37,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:31:37,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:31:37,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:31:37,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:31:37,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:31:37,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:31:37,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:31:37,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:31:37,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:31:37,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:31:37,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:31:37,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:31:37,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:31:37,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:31:37,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-20 09:31:37,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:31:37,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:31:37,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:31:37,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:31:37,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:31:37,345 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:31:37,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:31:37,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:31:37,346 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:31:37,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:31:37,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:31:37,347 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:31:37,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:31:37,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:31:37,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:31:37,348 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:31:37,348 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:31:37,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:31:37,349 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:31:37,349 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 09:31:37,349 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 09:31:37,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:31:37,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:31:37,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:31:37,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:31:37,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:31:37,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:37,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:31:37,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:31:37,351 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 09:31:37,351 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 09:31:37,351 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 09:31:37,351 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_fc22c523-09eb-448f-985b-d36940a365ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-20 09:31:37,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:31:37,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:31:37,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:31:37,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:31:37,698 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:31:37,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-20 09:31:40,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:31:41,103 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:31:41,104 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-20 09:31:41,113 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/60e48fe82/8fc48c746e2843a180ee5fdaf24083b6/FLAGc218911d0 [2022-11-20 09:31:41,133 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/data/60e48fe82/8fc48c746e2843a180ee5fdaf24083b6 [2022-11-20 09:31:41,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:31:41,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:31:41,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:41,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:31:41,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:31:41,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@609c9af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41, skipping insertion in model container [2022-11-20 09:31:41,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:31:41,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:31:41,399 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_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-20 09:31:41,431 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,437 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:41,493 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 09:31:41,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:31:41,517 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_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-20 09:31:41,524 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,530 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:41,563 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:31:41,583 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_fc22c523-09eb-448f-985b-d36940a365ce/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-20 09:31:41,598 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,600 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-20 09:31:41,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:41,643 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:31:41,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41 WrapperNode [2022-11-20 09:31:41,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:41,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:41,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:31:41,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:31:41,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,711 INFO L138 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-20 09:31:41,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:41,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:31:41,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:31:41,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:31:41,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:31:41,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:31:41,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:31:41,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:31:41,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (1/1) ... [2022-11-20 09:31:41,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:41,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:31:41,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:31:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:31:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 09:31:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:31:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 09:31:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-11-20 09:31:41,888 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-11-20 09:31:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-11-20 09:31:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-11-20 09:31:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 09:31:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-20 09:31:41,889 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-20 09:31:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 09:31:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-20 09:31:41,890 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-20 09:31:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:31:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-11-20 09:31:41,891 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-11-20 09:31:41,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:31:41,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:31:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 09:31:41,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 09:31:41,892 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-11-20 09:31:41,892 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-11-20 09:31:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:31:41,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 09:31:42,072 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:31:42,074 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:31:42,720 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:31:42,727 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:31:42,727 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:31:42,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:42 BoogieIcfgContainer [2022-11-20 09:31:42,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:31:42,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:31:42,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:31:42,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:31:42,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:31:41" (1/3) ... [2022-11-20 09:31:42,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e6dba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:42, skipping insertion in model container [2022-11-20 09:31:42,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:41" (2/3) ... [2022-11-20 09:31:42,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e6dba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:42, skipping insertion in model container [2022-11-20 09:31:42,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:42" (3/3) ... [2022-11-20 09:31:42,739 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2022-11-20 09:31:42,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:31:42,758 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-11-20 09:31:42,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:31:42,811 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;@37c26e0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:31:42,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-20 09:31:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 09:31:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:31:42,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:42,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:31:42,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash 120433579, now seen corresponding path program 1 times [2022-11-20 09:31:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865740160] [2022-11-20 09:31:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:42,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:42,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:42,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:31:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:43,093 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:43,109 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 09:31:43,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:43,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865740160] [2022-11-20 09:31:43,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865740160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:43,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:43,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:43,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137584668] [2022-11-20 09:31:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:43,164 INFO L87 Difference]: Start difference. First operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:43,475 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2022-11-20 09:31:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:31:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:43,491 INFO L225 Difference]: With dead ends: 175 [2022-11-20 09:31:43,491 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 09:31:43,499 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 09:31:43,504 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:43,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 09:31:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2022-11-20 09:31:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 140 states have internal predecessors, (148), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 09:31:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-11-20 09:31:43,568 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 5 [2022-11-20 09:31:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:43,568 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-11-20 09:31:43,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-11-20 09:31:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:31:43,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:43,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:31:43,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:43,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:43,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 120433580, now seen corresponding path program 1 times [2022-11-20 09:31:43,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:43,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101788850] [2022-11-20 09:31:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:43,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:43,777 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:43,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:43,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:43,859 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 09:31:43,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:43,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:43,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101788850] [2022-11-20 09:31:43,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101788850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:43,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:43,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:43,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629232992] [2022-11-20 09:31:43,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:43,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:43,880 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:44,144 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-20 09:31:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 09:31:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:44,147 INFO L225 Difference]: With dead ends: 169 [2022-11-20 09:31:44,147 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 09:31:44,147 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 09:31:44,148 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:44,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:31:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 09:31:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-20 09:31:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 139 states have internal predecessors, (147), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-20 09:31:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-11-20 09:31:44,169 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 5 [2022-11-20 09:31:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:44,170 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-11-20 09:31:44,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-11-20 09:31:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:44,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:44,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:44,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:44,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:44,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:44,384 INFO L85 PathProgramCache]: Analyzing trace with hash 854953177, now seen corresponding path program 1 times [2022-11-20 09:31:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157814724] [2022-11-20 09:31:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:44,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:44,386 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:44,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:31:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:44,603 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 09:31:44,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:44,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157814724] [2022-11-20 09:31:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157814724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:44,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:44,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:31:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466226533] [2022-11-20 09:31:44,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:44,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:31:44,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:44,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:31:44,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:44,605 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:44,875 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-11-20 09:31:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-20 09:31:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:44,879 INFO L225 Difference]: With dead ends: 233 [2022-11-20 09:31:44,879 INFO L226 Difference]: Without dead ends: 233 [2022-11-20 09:31:44,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:31:44,884 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 91 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:44,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1124 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:31:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-20 09:31:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 177. [2022-11-20 09:31:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 145 states have internal predecessors, (152), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-20 09:31:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-11-20 09:31:44,914 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 11 [2022-11-20 09:31:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:44,914 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-11-20 09:31:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-11-20 09:31:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:44,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:44,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:44,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-20 09:31:45,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:45,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash 873486780, now seen corresponding path program 1 times [2022-11-20 09:31:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:45,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052353333] [2022-11-20 09:31:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:45,133 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 09:31:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:45,135 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:45,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:31:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:45,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:45,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:45,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:45,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052353333] [2022-11-20 09:31:45,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052353333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:45,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:45,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:45,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993113927] [2022-11-20 09:31:45,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:45,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:45,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:45,303 INFO L87 Difference]: Start difference. First operand 177 states and 201 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:45,881 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-20 09:31:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:31:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-20 09:31:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:45,885 INFO L225 Difference]: With dead ends: 181 [2022-11-20 09:31:45,885 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 09:31:45,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 09:31:45,886 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 95 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:45,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 202 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:31:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 09:31:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-11-20 09:31:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 94 states have (on average 1.6595744680851063) internal successors, (156), 145 states have internal predecessors, (156), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 25 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-20 09:31:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2022-11-20 09:31:45,899 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 11 [2022-11-20 09:31:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:45,899 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2022-11-20 09:31:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:45,900 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2022-11-20 09:31:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:45,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:45,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:45,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:46,112 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash 873486781, now seen corresponding path program 1 times [2022-11-20 09:31:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037858291] [2022-11-20 09:31:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:46,114 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 09:31:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:46,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:46,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:31:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:46,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:46,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:46,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:46,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037858291] [2022-11-20 09:31:46,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037858291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:46,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:46,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456532911] [2022-11-20 09:31:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:31:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:31:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:31:46,264 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:46,880 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2022-11-20 09:31:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:31:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-20 09:31:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:46,883 INFO L225 Difference]: With dead ends: 185 [2022-11-20 09:31:46,883 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 09:31:46,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 09:31:46,884 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:46,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 177 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:31:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 09:31:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-20 09:31:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 147 states have internal predecessors, (157), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-11-20 09:31:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-11-20 09:31:46,902 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 11 [2022-11-20 09:31:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:46,902 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-11-20 09:31:46,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 09:31:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-11-20 09:31:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 09:31:46,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:46,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:46,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:47,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1280810199, now seen corresponding path program 1 times [2022-11-20 09:31:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535187869] [2022-11-20 09:31:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:47,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:47,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:47,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:31:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:47,309 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 09:31:47,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:31:47,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535187869] [2022-11-20 09:31:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535187869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:47,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:47,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:31:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411631435] [2022-11-20 09:31:47,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:47,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:31:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:47,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:31:47,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:47,313 INFO L87 Difference]: Start difference. First operand 182 states and 209 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:31:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:47,497 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-11-20 09:31:47,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:47,498 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-20 09:31:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:47,500 INFO L225 Difference]: With dead ends: 242 [2022-11-20 09:31:47,500 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 09:31:47,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:31:47,501 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 90 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:47,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1123 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 09:31:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2022-11-20 09:31:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 110 states have (on average 1.5909090909090908) internal successors, (175), 161 states have internal predecessors, (175), 31 states have call successors, (31), 9 states have call predecessors, (31), 10 states have return successors, (35), 33 states have call predecessors, (35), 31 states have call successors, (35) [2022-11-20 09:31:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2022-11-20 09:31:47,529 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 17 [2022-11-20 09:31:47,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:47,529 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2022-11-20 09:31:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 09:31:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2022-11-20 09:31:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 09:31:47,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:47,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:47,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:47,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:47,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1539264760, now seen corresponding path program 1 times [2022-11-20 09:31:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658474142] [2022-11-20 09:31:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:47,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:31:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:48,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:48,069 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_109 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109))))) is different from true [2022-11-20 09:31:48,133 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:31:48,242 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:31:48,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:31:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-20 09:31:48,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:48,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658474142] [2022-11-20 09:31:48,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658474142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1365830177] [2022-11-20 09:31:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:31:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:31:48,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:31:48,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 09:31:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:48,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:31:48,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:48,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:48,821 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:31:48,889 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 09:31:48,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 09:31:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-20 09:31:48,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:49,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1365830177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:49,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:49,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-20 09:31:49,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238202641] [2022-11-20 09:31:49,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:31:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:31:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-20 09:31:49,033 INFO L87 Difference]: Start difference. First operand 204 states and 241 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:31:51,255 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:31:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:51,612 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2022-11-20 09:31:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:31:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2022-11-20 09:31:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:51,615 INFO L225 Difference]: With dead ends: 210 [2022-11-20 09:31:51,615 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 09:31:51,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=21, Unknown=5, NotChecked=44, Total=90 [2022-11-20 09:31:51,616 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 92 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:51,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 206 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 248 Invalid, 0 Unknown, 597 Unchecked, 0.5s Time] [2022-11-20 09:31:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 09:31:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-11-20 09:31:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 113 states have (on average 1.584070796460177) internal successors, (179), 164 states have internal predecessors, (179), 31 states have call successors, (31), 9 states have call predecessors, (31), 11 states have return successors, (39), 34 states have call predecessors, (39), 31 states have call successors, (39) [2022-11-20 09:31:51,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2022-11-20 09:31:51,640 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 29 [2022-11-20 09:31:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:51,640 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2022-11-20 09:31:51,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:31:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2022-11-20 09:31:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:31:51,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:51,647 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:51,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-20 09:31:51,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:52,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:52,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1070284721, now seen corresponding path program 1 times [2022-11-20 09:31:52,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:52,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271958376] [2022-11-20 09:31:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:52,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:52,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:52,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:52,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:52,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:52,245 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:52,322 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_227 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_227) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:31:52,370 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_227 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_227) |c_#length|))) is different from true [2022-11-20 09:31:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:52,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:31:52,464 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:31:52,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:31:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-20 09:31:52,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:52,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:52,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271958376] [2022-11-20 09:31:52,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271958376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:52,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426760493] [2022-11-20 09:31:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:52,835 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:31:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:31:52,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:31:52,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-20 09:31:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:53,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:53,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:53,221 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_279 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_279) |c_#length|)))) is different from true [2022-11-20 09:31:53,257 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_279 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_279) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:31:53,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:53,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:31:53,338 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:31:53,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:31:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-20 09:31:53,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:53,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426760493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:53,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:53,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 09:31:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581702880] [2022-11-20 09:31:53,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-20 09:31:53,527 INFO L87 Difference]: Start difference. First operand 208 states and 249 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 09:31:53,968 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_227 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_227) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_279 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_279) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:31:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:54,505 INFO L93 Difference]: Finished difference Result 227 states and 281 transitions. [2022-11-20 09:31:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:31:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-11-20 09:31:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:54,507 INFO L225 Difference]: With dead ends: 227 [2022-11-20 09:31:54,508 INFO L226 Difference]: Without dead ends: 227 [2022-11-20 09:31:54,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-20 09:31:54,508 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 185 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 846 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:54,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 225 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 438 Invalid, 0 Unknown, 846 Unchecked, 0.9s Time] [2022-11-20 09:31:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-20 09:31:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-11-20 09:31:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 124 states have (on average 1.532258064516129) internal successors, (190), 176 states have internal predecessors, (190), 34 states have call successors, (34), 10 states have call predecessors, (34), 13 states have return successors, (48), 37 states have call predecessors, (48), 34 states have call successors, (48) [2022-11-20 09:31:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 272 transitions. [2022-11-20 09:31:54,520 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 272 transitions. Word has length 25 [2022-11-20 09:31:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:54,521 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 272 transitions. [2022-11-20 09:31:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 09:31:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 272 transitions. [2022-11-20 09:31:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:31:54,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:54,522 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:54,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:54,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:54,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050227, now seen corresponding path program 1 times [2022-11-20 09:31:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399621056] [2022-11-20 09:31:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:54,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:54,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:54,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:55,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:31:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:55,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:31:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:55,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:55,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399621056] [2022-11-20 09:31:55,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399621056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:55,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:55,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 09:31:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645248957] [2022-11-20 09:31:55,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:31:55,444 INFO L87 Difference]: Start difference. First operand 224 states and 272 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:31:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:56,923 INFO L93 Difference]: Finished difference Result 244 states and 296 transitions. [2022-11-20 09:31:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:31:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2022-11-20 09:31:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:56,925 INFO L225 Difference]: With dead ends: 244 [2022-11-20 09:31:56,926 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 09:31:56,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:31:56,926 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 162 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:56,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 621 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1030 Invalid, 0 Unknown, 59 Unchecked, 1.4s Time] [2022-11-20 09:31:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 09:31:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 236. [2022-11-20 09:31:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.5185185185185186) internal successors, (205), 185 states have internal predecessors, (205), 36 states have call successors, (36), 11 states have call predecessors, (36), 14 states have return successors, (50), 39 states have call predecessors, (50), 36 states have call successors, (50) [2022-11-20 09:31:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 291 transitions. [2022-11-20 09:31:56,943 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 291 transitions. Word has length 25 [2022-11-20 09:31:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:56,945 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 291 transitions. [2022-11-20 09:31:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:31:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 291 transitions. [2022-11-20 09:31:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:31:56,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:56,948 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:56,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:57,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:57,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:31:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050226, now seen corresponding path program 1 times [2022-11-20 09:31:57,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:57,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604788616] [2022-11-20 09:31:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:57,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:57,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:57,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:57,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:31:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:57,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:57,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:57,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:58,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:58,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604788616] [2022-11-20 09:31:58,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604788616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:58,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:58,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 09:31:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644563964] [2022-11-20 09:31:58,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:31:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:31:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:31:58,827 INFO L87 Difference]: Start difference. First operand 236 states and 291 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 09:32:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:04,064 INFO L93 Difference]: Finished difference Result 261 states and 327 transitions. [2022-11-20 09:32:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:32:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-11-20 09:32:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:04,068 INFO L225 Difference]: With dead ends: 261 [2022-11-20 09:32:04,070 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 09:32:04,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:32:04,071 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 161 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:04,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 658 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1555 Invalid, 0 Unknown, 45 Unchecked, 4.9s Time] [2022-11-20 09:32:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 09:32:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2022-11-20 09:32:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 147 states have (on average 1.4965986394557824) internal successors, (220), 197 states have internal predecessors, (220), 39 states have call successors, (39), 12 states have call predecessors, (39), 15 states have return successors, (53), 42 states have call predecessors, (53), 39 states have call successors, (53) [2022-11-20 09:32:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 312 transitions. [2022-11-20 09:32:04,092 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 312 transitions. Word has length 25 [2022-11-20 09:32:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:04,092 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 312 transitions. [2022-11-20 09:32:04,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 09:32:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 312 transitions. [2022-11-20 09:32:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:32:04,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:04,097 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:04,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:04,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:04,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting tree_inorderErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 369889479, now seen corresponding path program 1 times [2022-11-20 09:32:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262464592] [2022-11-20 09:32:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:04,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:04,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:04,312 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:04,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:32:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:04,441 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 09:32:04,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:04,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262464592] [2022-11-20 09:32:04,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262464592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:04,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:04,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:32:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963528665] [2022-11-20 09:32:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:04,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:32:04,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:32:04,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:32:04,444 INFO L87 Difference]: Start difference. First operand 252 states and 312 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:32:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:04,492 INFO L93 Difference]: Finished difference Result 242 states and 293 transitions. [2022-11-20 09:32:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:32:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-20 09:32:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:04,494 INFO L225 Difference]: With dead ends: 242 [2022-11-20 09:32:04,494 INFO L226 Difference]: Without dead ends: 226 [2022-11-20 09:32:04,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:32:04,495 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 0 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:04,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 744 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:32:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-20 09:32:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-11-20 09:32:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 130 states have (on average 1.5307692307692307) internal successors, (199), 181 states have internal predecessors, (199), 31 states have call successors, (31), 10 states have call predecessors, (31), 14 states have return successors, (47), 34 states have call predecessors, (47), 31 states have call successors, (47) [2022-11-20 09:32:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 277 transitions. [2022-11-20 09:32:04,506 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 277 transitions. Word has length 30 [2022-11-20 09:32:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:04,507 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 277 transitions. [2022-11-20 09:32:04,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:32:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 277 transitions. [2022-11-20 09:32:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:32:04,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:04,508 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 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 09:32:04,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:04,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash -648076771, now seen corresponding path program 1 times [2022-11-20 09:32:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:04,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500875286] [2022-11-20 09:32:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:04,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:04,722 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:04,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:32:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:32:04,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:04,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:04,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500875286] [2022-11-20 09:32:04,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500875286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:04,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:04,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 09:32:04,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169641012] [2022-11-20 09:32:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:32:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:32:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:32:04,910 INFO L87 Difference]: Start difference. First operand 226 states and 277 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 09:32:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:05,250 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2022-11-20 09:32:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-11-20 09:32:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:05,252 INFO L225 Difference]: With dead ends: 232 [2022-11-20 09:32:05,252 INFO L226 Difference]: Without dead ends: 228 [2022-11-20 09:32:05,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:05,253 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 109 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:05,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1017 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:32:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-20 09:32:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2022-11-20 09:32:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 130 states have (on average 1.5153846153846153) internal successors, (197), 181 states have internal predecessors, (197), 31 states have call successors, (31), 10 states have call predecessors, (31), 14 states have return successors, (47), 34 states have call predecessors, (47), 31 states have call successors, (47) [2022-11-20 09:32:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2022-11-20 09:32:05,262 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 31 [2022-11-20 09:32:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:05,263 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2022-11-20 09:32:05,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 09:32:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2022-11-20 09:32:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:32:05,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:05,264 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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 09:32:05,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:05,475 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2088825952, now seen corresponding path program 1 times [2022-11-20 09:32:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:05,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477781877] [2022-11-20 09:32:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:05,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:05,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:05,479 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:05,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 09:32:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:32:05,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:32:05,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:32:05,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:32:06,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 [2022-11-20 09:32:06,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 [2022-11-20 09:32:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:06,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:07,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477781877] [2022-11-20 09:32:07,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477781877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:07,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:07,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2022-11-20 09:32:07,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644782191] [2022-11-20 09:32:07,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:07,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 09:32:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 09:32:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:32:07,714 INFO L87 Difference]: Start difference. First operand 226 states and 275 transitions. Second operand has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:32:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:09,250 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2022-11-20 09:32:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:32:09,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-11-20 09:32:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:09,252 INFO L225 Difference]: With dead ends: 248 [2022-11-20 09:32:09,253 INFO L226 Difference]: Without dead ends: 248 [2022-11-20 09:32:09,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:32:09,254 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 90 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:09,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 2524 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 464 Invalid, 0 Unknown, 106 Unchecked, 1.1s Time] [2022-11-20 09:32:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-20 09:32:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 236. [2022-11-20 09:32:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.5036496350364963) internal successors, (206), 188 states have internal predecessors, (206), 31 states have call successors, (31), 13 states have call predecessors, (31), 17 states have return successors, (47), 34 states have call predecessors, (47), 31 states have call successors, (47) [2022-11-20 09:32:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 284 transitions. [2022-11-20 09:32:09,265 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 284 transitions. Word has length 31 [2022-11-20 09:32:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:09,266 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 284 transitions. [2022-11-20 09:32:09,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 09:32:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 284 transitions. [2022-11-20 09:32:09,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 09:32:09,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:09,268 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:09,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:09,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:09,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:09,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1361134830, now seen corresponding path program 1 times [2022-11-20 09:32:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:09,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828437555] [2022-11-20 09:32:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:09,485 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:09,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:09,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:09,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:09,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:32:09,927 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_530 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_530))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:09,985 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_530 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_530)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:10,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:10,079 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:32:10,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:32:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 13 not checked. [2022-11-20 09:32:10,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:10,330 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:10,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828437555] [2022-11-20 09:32:10,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828437555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:10,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [354992081] [2022-11-20 09:32:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:10,330 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:10,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:32:10,332 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:32:10,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 09:32:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:10,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:32:10,899 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_634 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_634) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:10,934 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_634 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_634) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:11,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:11,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:11,041 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:32:11,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:32:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 13 not checked. [2022-11-20 09:32:11,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:13,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [354992081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:13,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:13,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 09:32:13,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453422547] [2022-11-20 09:32:13,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:13,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:13,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-20 09:32:13,269 INFO L87 Difference]: Start difference. First operand 236 states and 284 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:32:13,386 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_634 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_634) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_530 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_530)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:32:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:14,211 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2022-11-20 09:32:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 51 [2022-11-20 09:32:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:14,216 INFO L225 Difference]: With dead ends: 241 [2022-11-20 09:32:14,216 INFO L226 Difference]: Without dead ends: 241 [2022-11-20 09:32:14,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-20 09:32:14,218 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 177 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 786 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:14,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 217 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 420 Invalid, 0 Unknown, 786 Unchecked, 0.8s Time] [2022-11-20 09:32:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-20 09:32:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2022-11-20 09:32:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 138 states have (on average 1.5072463768115942) internal successors, (208), 188 states have internal predecessors, (208), 31 states have call successors, (31), 13 states have call predecessors, (31), 17 states have return successors, (47), 35 states have call predecessors, (47), 31 states have call successors, (47) [2022-11-20 09:32:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 286 transitions. [2022-11-20 09:32:14,228 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 286 transitions. Word has length 51 [2022-11-20 09:32:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:14,228 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 286 transitions. [2022-11-20 09:32:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 6 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:32:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 286 transitions. [2022-11-20 09:32:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:32:14,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:14,230 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:14,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 09:32:14,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:14,652 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash -931523585, now seen corresponding path program 1 times [2022-11-20 09:32:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:14,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043089885] [2022-11-20 09:32:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:14,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:14,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:32:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:14,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:15,025 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_731 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_731))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:15,059 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_731 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_731)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:15,135 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:32:15,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:32:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-20 09:32:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:15,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043089885] [2022-11-20 09:32:15,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043089885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880531232] [2022-11-20 09:32:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:32:15,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:32:15,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-20 09:32:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:32:15,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:15,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:15,725 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:32:15,783 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 09:32:15,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 09:32:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-20 09:32:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:15,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [880531232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:15,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:15,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-20 09:32:15,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292726417] [2022-11-20 09:32:15,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:15,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:32:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:32:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-20 09:32:15,913 INFO L87 Difference]: Start difference. First operand 237 states and 286 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:32:17,985 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_731 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_731)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:32:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:18,433 INFO L93 Difference]: Finished difference Result 240 states and 294 transitions. [2022-11-20 09:32:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:32:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-20 09:32:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:18,435 INFO L225 Difference]: With dead ends: 240 [2022-11-20 09:32:18,435 INFO L226 Difference]: Without dead ends: 240 [2022-11-20 09:32:18,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=21, Unknown=5, NotChecked=44, Total=90 [2022-11-20 09:32:18,436 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 89 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:18,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 211 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 241 Invalid, 0 Unknown, 599 Unchecked, 0.5s Time] [2022-11-20 09:32:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-20 09:32:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2022-11-20 09:32:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.5036496350364963) internal successors, (206), 188 states have internal predecessors, (206), 31 states have call successors, (31), 13 states have call predecessors, (31), 17 states have return successors, (47), 34 states have call predecessors, (47), 31 states have call successors, (47) [2022-11-20 09:32:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 284 transitions. [2022-11-20 09:32:18,445 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 284 transitions. Word has length 45 [2022-11-20 09:32:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:18,446 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 284 transitions. [2022-11-20 09:32:18,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:32:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 284 transitions. [2022-11-20 09:32:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:32:18,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:18,447 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 09:32:18,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:18,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:18,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash -189298012, now seen corresponding path program 2 times [2022-11-20 09:32:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788861366] [2022-11-20 09:32:18,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:18,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:18,860 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:18,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:19,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:32:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:19,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:19,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_906 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_906) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:19,135 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:32:19,285 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 09:32:19,285 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 09:32:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 23 not checked. [2022-11-20 09:32:19,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:21,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:21,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788861366] [2022-11-20 09:32:21,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788861366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212079013] [2022-11-20 09:32:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:21,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:32:21,431 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:32:21,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-20 09:32:21,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:32:21,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471675369] [2022-11-20 09:32:21,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:21,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:21,739 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:21,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:32:21,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 1 [2022-11-20 09:32:21,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:21,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:32:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:22,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:22,020 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1063 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1063) |c_#valid|)) is different from true [2022-11-20 09:32:22,041 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1064 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1064))) is different from true [2022-11-20 09:32:24,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1063 (_ BitVec 1)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1063) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) is different from true [2022-11-20 09:32:26,227 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1063 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1063) v_nondet_tree_~n~0.base_66 (_ bv1 1)) |c_#valid|))) is different from true [2022-11-20 09:32:26,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:32:26,304 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-20 09:32:26,304 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-20 09:32:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 28 not checked. [2022-11-20 09:32:26,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:26,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471675369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:26,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:26,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 12 [2022-11-20 09:32:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124129341] [2022-11-20 09:32:26,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:32:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:32:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=53, Unknown=9, NotChecked=114, Total=210 [2022-11-20 09:32:26,542 INFO L87 Difference]: Start difference. First operand 236 states and 284 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 09:32:30,739 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_1064 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1064)))) is different from true [2022-11-20 09:32:34,781 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1063 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1063) v_nondet_tree_~n~0.base_66 (_ bv1 1)) |c_#valid|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-20 09:32:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:39,287 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2022-11-20 09:32:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:32:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) Word has length 39 [2022-11-20 09:32:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:39,290 INFO L225 Difference]: With dead ends: 242 [2022-11-20 09:32:39,290 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 09:32:39,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=53, Invalid=75, Unknown=14, NotChecked=200, Total=342 [2022-11-20 09:32:39,291 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 92 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1317 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:39,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 271 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 1317 Unchecked, 0.4s Time] [2022-11-20 09:32:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 09:32:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-11-20 09:32:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 141 states have (on average 1.49645390070922) internal successors, (211), 191 states have internal predecessors, (211), 31 states have call successors, (31), 13 states have call predecessors, (31), 18 states have return successors, (54), 36 states have call predecessors, (54), 31 states have call successors, (54) [2022-11-20 09:32:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 296 transitions. [2022-11-20 09:32:39,300 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 296 transitions. Word has length 39 [2022-11-20 09:32:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:39,300 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 296 transitions. [2022-11-20 09:32:39,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 09:32:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 296 transitions. [2022-11-20 09:32:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:32:39,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:39,301 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 09:32:39,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:39,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:39,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:39,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash -189298011, now seen corresponding path program 2 times [2022-11-20 09:32:39,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191841878] [2022-11-20 09:32:39,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:39,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:39,710 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:39,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:39,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:39,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:32:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:39,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:39,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:32:40,032 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1146 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1146) |c_#length|)))) is different from true [2022-11-20 09:32:40,060 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:32:40,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1146 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1146) v_nondet_tree_~n~0.base_77 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:40,221 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 09:32:40,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:32:40,240 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:32:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:32:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 30 not checked. [2022-11-20 09:32:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:41,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:41,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191841878] [2022-11-20 09:32:41,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191841878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200153739] [2022-11-20 09:32:41,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:32:41,539 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:32:41,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 09:32:41,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:41,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:41,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:32:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:41,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:32:41,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:41,956 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1229 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1229))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:42,031 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1229 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1229) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-20 09:32:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:42,138 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 09:32:42,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:32:42,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:32:42,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:32:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 30 not checked. [2022-11-20 09:32:42,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:44,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200153739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:44,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:44,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-20 09:32:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106263504] [2022-11-20 09:32:44,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 09:32:44,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 09:32:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=43, Unknown=5, NotChecked=80, Total=156 [2022-11-20 09:32:44,701 INFO L87 Difference]: Start difference. First operand 241 states and 296 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:32:45,190 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1229 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1229) nondet_tree_~n~0.base (_ bv12 32))))) (exists ((v_ArrVal_1146 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1146) v_nondet_tree_~n~0.base_77 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:32:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:45,412 INFO L93 Difference]: Finished difference Result 263 states and 332 transitions. [2022-11-20 09:32:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:32:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-11-20 09:32:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:45,414 INFO L225 Difference]: With dead ends: 263 [2022-11-20 09:32:45,414 INFO L226 Difference]: Without dead ends: 263 [2022-11-20 09:32:45,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=43, Invalid=64, Unknown=7, NotChecked=126, Total=240 [2022-11-20 09:32:45,415 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 179 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1019 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:45,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 182 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 271 Invalid, 0 Unknown, 1019 Unchecked, 0.6s Time] [2022-11-20 09:32:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-20 09:32:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-11-20 09:32:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 155 states have (on average 1.4580645161290322) internal successors, (226), 208 states have internal predecessors, (226), 35 states have call successors, (35), 15 states have call predecessors, (35), 21 states have return successors, (70), 38 states have call predecessors, (70), 35 states have call successors, (70) [2022-11-20 09:32:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 331 transitions. [2022-11-20 09:32:45,425 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 331 transitions. Word has length 39 [2022-11-20 09:32:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:45,425 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 331 transitions. [2022-11-20 09:32:45,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:32:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 331 transitions. [2022-11-20 09:32:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:32:45,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:45,427 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:45,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:45,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:45,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2047148606, now seen corresponding path program 2 times [2022-11-20 09:32:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179617894] [2022-11-20 09:32:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:45,833 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:45,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:46,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:32:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:32:46,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:47,064 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 22 treesize of output 18 [2022-11-20 09:32:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:32:47,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179617894] [2022-11-20 09:32:47,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179617894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:47,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:47,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 09:32:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947074619] [2022-11-20 09:32:47,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:32:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:32:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:32:47,218 INFO L87 Difference]: Start difference. First operand 262 states and 331 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:32:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:50,076 INFO L93 Difference]: Finished difference Result 267 states and 336 transitions. [2022-11-20 09:32:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:32:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2022-11-20 09:32:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:50,079 INFO L225 Difference]: With dead ends: 267 [2022-11-20 09:32:50,079 INFO L226 Difference]: Without dead ends: 267 [2022-11-20 09:32:50,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:32:50,080 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 74 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:50,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1694 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 708 Invalid, 0 Unknown, 164 Unchecked, 2.6s Time] [2022-11-20 09:32:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-20 09:32:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 262. [2022-11-20 09:32:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 208 states have internal predecessors, (224), 35 states have call successors, (35), 15 states have call predecessors, (35), 21 states have return successors, (70), 38 states have call predecessors, (70), 35 states have call successors, (70) [2022-11-20 09:32:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 329 transitions. [2022-11-20 09:32:50,090 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 329 transitions. Word has length 39 [2022-11-20 09:32:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:50,090 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 329 transitions. [2022-11-20 09:32:50,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:32:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 329 transitions. [2022-11-20 09:32:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 09:32:50,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:50,091 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 09:32:50,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:50,304 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:32:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1831948676, now seen corresponding path program 3 times [2022-11-20 09:32:50,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:50,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43959314] [2022-11-20 09:32:50,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:50,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:50,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:50,306 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:32:50,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:32:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:32:50,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:50,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:50,743 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1386 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1386) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:50,773 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1386 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1386) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:32:50,793 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1387 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1387) |c_#valid|)) is different from true [2022-11-20 09:32:50,831 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:32:52,948 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 09:32:52,948 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 09:32:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 22 not checked. [2022-11-20 09:32:52,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:53,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43959314] [2022-11-20 09:32:53,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43959314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200755587] [2022-11-20 09:32:53,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:53,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:32:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:32:53,511 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:32:53,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-20 09:32:54,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:32:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:54,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:32:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:54,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1485 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1485))) is different from true [2022-11-20 09:32:54,061 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1486 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1486) |c_#valid|)) is different from true [2022-11-20 09:32:54,116 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1485 (_ BitVec 1)) (v_nondet_tree_~n~0.base_123 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1485) v_nondet_tree_~n~0.base_123 (_ bv1 1)))) is different from true [2022-11-20 09:32:56,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:32:56,217 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-20 09:32:56,217 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-20 09:32:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 20 not checked. [2022-11-20 09:32:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:56,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200755587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:56,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:56,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-20 09:32:56,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481538730] [2022-11-20 09:32:56,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:56,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:32:56,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:56,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:32:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=61, Unknown=9, NotChecked=154, Total=272 [2022-11-20 09:32:56,523 INFO L87 Difference]: Start difference. First operand 262 states and 329 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:33:00,657 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1485 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1485))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_1386 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1386) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:33:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:01,807 INFO L93 Difference]: Finished difference Result 275 states and 368 transitions. [2022-11-20 09:33:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:33:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2022-11-20 09:33:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:01,809 INFO L225 Difference]: With dead ends: 275 [2022-11-20 09:33:01,809 INFO L226 Difference]: Without dead ends: 275 [2022-11-20 09:33:01,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=67, Invalid=86, Unknown=11, NotChecked=216, Total=380 [2022-11-20 09:33:01,810 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 95 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1625 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:01,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 273 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 253 Invalid, 0 Unknown, 1625 Unchecked, 0.4s Time] [2022-11-20 09:33:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-20 09:33:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 267. [2022-11-20 09:33:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 159 states have (on average 1.440251572327044) internal successors, (229), 211 states have internal predecessors, (229), 35 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (81), 40 states have call predecessors, (81), 35 states have call successors, (81) [2022-11-20 09:33:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 345 transitions. [2022-11-20 09:33:01,822 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 345 transitions. Word has length 43 [2022-11-20 09:33:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 345 transitions. [2022-11-20 09:33:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 09:33:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 345 transitions. [2022-11-20 09:33:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 09:33:01,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:01,824 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 09:33:01,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:02,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:02,243 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:33:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 356253163, now seen corresponding path program 3 times [2022-11-20 09:33:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247911913] [2022-11-20 09:33:02,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:02,244 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 09:33:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:02,245 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:02,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:02,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:33:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:02,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:33:02,846 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (v_ArrVal_1591 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1591) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:33:02,914 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 09:33:02,914 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-20 09:33:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 3 refuted. 1 times theorem prover too weak. 19 trivial. 26 not checked. [2022-11-20 09:33:02,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:03,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:03,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247911913] [2022-11-20 09:33:03,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247911913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:03,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899338622] [2022-11-20 09:33:03,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:33:03,456 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:33:03,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 09:33:04,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:33:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 09:33:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:04,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:04,101 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:04,260 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1698 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1698)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:04,460 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1699 (_ BitVec 32)) (v_ArrVal_1698 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1698) |c_nondet_tree_#t~ret9.base| v_ArrVal_1699) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:04,480 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1699 (_ BitVec 32)) (v_ArrVal_1698 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1698) |nondet_tree_#t~ret9.base| v_ArrVal_1699)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:04,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:04,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:04,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 09:33:04,549 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 09:33:04,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-20 09:33:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 14 not checked. [2022-11-20 09:33:04,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:05,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1899338622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:05,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:05,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2022-11-20 09:33:05,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232514402] [2022-11-20 09:33:05,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:05,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:33:05,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:33:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=170, Unknown=11, NotChecked=150, Total=380 [2022-11-20 09:33:05,399 INFO L87 Difference]: Start difference. First operand 267 states and 345 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-20 09:33:09,822 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1699 (_ BitVec 32)) (v_ArrVal_1698 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1698) |nondet_tree_#t~ret9.base| v_ArrVal_1699)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (v_ArrVal_1591 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1591) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 09:33:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:10,247 INFO L93 Difference]: Finished difference Result 269 states and 351 transitions. [2022-11-20 09:33:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:33:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2022-11-20 09:33:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:10,250 INFO L225 Difference]: With dead ends: 269 [2022-11-20 09:33:10,250 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 09:33:10,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=81, Invalid=308, Unknown=15, NotChecked=246, Total=650 [2022-11-20 09:33:10,251 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 99 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1915 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:10,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 398 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 1915 Unchecked, 0.5s Time] [2022-11-20 09:33:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 09:33:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2022-11-20 09:33:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 159 states have (on average 1.4339622641509433) internal successors, (228), 211 states have internal predecessors, (228), 35 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (81), 40 states have call predecessors, (81), 35 states have call successors, (81) [2022-11-20 09:33:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 344 transitions. [2022-11-20 09:33:10,261 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 344 transitions. Word has length 49 [2022-11-20 09:33:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:10,262 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 344 transitions. [2022-11-20 09:33:10,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-20 09:33:10,262 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 344 transitions. [2022-11-20 09:33:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 09:33:10,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:10,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 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 09:33:10,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:10,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:10,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:10,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:33:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1322566655, now seen corresponding path program 1 times [2022-11-20 09:33:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:10,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754508387] [2022-11-20 09:33:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:10,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:10,681 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:10,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 09:33:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:10,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:33:10,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:33:11,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-20 09:33:11,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-20 09:33:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:33:11,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:33:11,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:11,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754508387] [2022-11-20 09:33:11,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754508387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:11,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:11,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-11-20 09:33:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910736082] [2022-11-20 09:33:11,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:11,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:33:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:33:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:33:11,770 INFO L87 Difference]: Start difference. First operand 267 states and 344 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:33:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:12,408 INFO L93 Difference]: Finished difference Result 308 states and 404 transitions. [2022-11-20 09:33:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:33:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-20 09:33:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:12,411 INFO L225 Difference]: With dead ends: 308 [2022-11-20 09:33:12,411 INFO L226 Difference]: Without dead ends: 308 [2022-11-20 09:33:12,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:33:12,412 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 43 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:12,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1545 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-11-20 09:33:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-20 09:33:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 299. [2022-11-20 09:33:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 183 states have (on average 1.4207650273224044) internal successors, (260), 236 states have internal predecessors, (260), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 44 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:33:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 397 transitions. [2022-11-20 09:33:12,425 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 397 transitions. Word has length 38 [2022-11-20 09:33:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:12,426 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 397 transitions. [2022-11-20 09:33:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:33:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 397 transitions. [2022-11-20 09:33:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 09:33:12,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:12,428 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:33:12,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:12,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:12,639 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:33:12,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1545271268, now seen corresponding path program 2 times [2022-11-20 09:33:12,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983658583] [2022-11-20 09:33:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:12,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:12,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:13,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:13,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:33:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:13,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:13,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:13,134 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1855 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1855) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:13,174 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1855 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1855) |c_#length|))) is different from true [2022-11-20 09:33:13,199 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:33:13,259 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1855 (_ BitVec 32)) (v_nondet_tree_~n~0.base_159 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_159)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_159 v_ArrVal_1855) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:33:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:13,327 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 09:33:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:33:13,346 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:33:13,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:33:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-20 09:33:13,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:15,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:15,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983658583] [2022-11-20 09:33:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983658583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047660489] [2022-11-20 09:33:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:33:15,733 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:33:15,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-20 09:33:16,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:33:16,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:16,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:16,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:16,327 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1967 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1967) |c_#length|)))) is different from true [2022-11-20 09:33:16,358 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1967 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1967) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:16,432 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1967 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_170 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1967) v_nondet_tree_~n~0.base_170 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:16,522 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 09:33:16,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:33:16,540 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:33:16,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:33:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-20 09:33:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:16,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047660489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:16,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:16,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 09:33:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360048855] [2022-11-20 09:33:16,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:16,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:33:16,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:33:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=44, Unknown=8, NotChecked=126, Total=210 [2022-11-20 09:33:16,922 INFO L87 Difference]: Start difference. First operand 299 states and 397 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 09:33:17,162 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1967 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_170 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1967) v_nondet_tree_~n~0.base_170 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_1855 (_ BitVec 32)) (v_nondet_tree_~n~0.base_159 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_159)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_159 v_ArrVal_1855) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 09:33:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:17,715 INFO L93 Difference]: Finished difference Result 301 states and 399 transitions. [2022-11-20 09:33:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:33:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 55 [2022-11-20 09:33:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:17,718 INFO L225 Difference]: With dead ends: 301 [2022-11-20 09:33:17,718 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 09:33:17,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=40, Invalid=55, Unknown=9, NotChecked=168, Total=272 [2022-11-20 09:33:17,719 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 95 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1360 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:17,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 204 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 1360 Unchecked, 0.6s Time] [2022-11-20 09:33:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 09:33:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-11-20 09:33:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 184 states have (on average 1.423913043478261) internal successors, (262), 236 states have internal predecessors, (262), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 45 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:33:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 399 transitions. [2022-11-20 09:33:17,729 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 399 transitions. Word has length 55 [2022-11-20 09:33:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:17,730 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 399 transitions. [2022-11-20 09:33:17,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 09:33:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 399 transitions. [2022-11-20 09:33:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 09:33:17,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:17,731 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:33:17,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:17,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:18,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:33:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1545271269, now seen corresponding path program 2 times [2022-11-20 09:33:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821565104] [2022-11-20 09:33:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:18,155 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:18,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:18,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:18,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:18,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:18,621 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2078 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2078) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:18,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2078 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2078) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:18,674 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:33:18,785 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 09:33:18,785 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 09:33:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 31 not checked. [2022-11-20 09:33:18,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:20,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821565104] [2022-11-20 09:33:20,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821565104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018818492] [2022-11-20 09:33:20,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:20,967 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:33:20,968 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:33:20,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-20 09:33:21,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:33:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388956576] [2022-11-20 09:33:21,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:21,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:21,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:21,546 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:21,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 1 [2022-11-20 09:33:21,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 09:33:21,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:21,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:21,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:33:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:21,893 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2292 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2292) |c_#valid|)) is different from true [2022-11-20 09:33:21,925 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2293 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2293) |c_#valid|)) is different from true [2022-11-20 09:33:24,012 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2292 (_ BitVec 1)) (v_nondet_tree_~n~0.base_192 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2292) v_nondet_tree_~n~0.base_192 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:33:26,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:33:26,138 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-20 09:33:26,139 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-20 09:33:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 20 not checked. [2022-11-20 09:33:26,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:26,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388956576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:26,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:26,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-11-20 09:33:26,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325748804] [2022-11-20 09:33:26,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:26,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:33:26,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:33:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=76, Unknown=9, NotChecked=138, Total=272 [2022-11-20 09:33:26,472 INFO L87 Difference]: Start difference. First operand 300 states and 399 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 09:33:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:43,229 INFO L93 Difference]: Finished difference Result 302 states and 400 transitions. [2022-11-20 09:33:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:33:43,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 55 [2022-11-20 09:33:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:43,232 INFO L225 Difference]: With dead ends: 302 [2022-11-20 09:33:43,232 INFO L226 Difference]: Without dead ends: 302 [2022-11-20 09:33:43,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=66, Invalid=101, Unknown=13, NotChecked=162, Total=342 [2022-11-20 09:33:43,233 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 92 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1633 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:43,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 368 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 1633 Unchecked, 0.5s Time] [2022-11-20 09:33:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-20 09:33:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-11-20 09:33:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 185 states have (on average 1.4216216216216215) internal successors, (263), 236 states have internal predecessors, (263), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 46 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:33:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 400 transitions. [2022-11-20 09:33:43,244 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 400 transitions. Word has length 55 [2022-11-20 09:33:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:43,245 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 400 transitions. [2022-11-20 09:33:43,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-20 09:33:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 400 transitions. [2022-11-20 09:33:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 09:33:43,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:43,246 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 09:33:43,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:43,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:43,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:43,654 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:33:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1161376290, now seen corresponding path program 3 times [2022-11-20 09:33:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920610910] [2022-11-20 09:33:43,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:43,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:43,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:43,656 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:43,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:33:44,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 09:33:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:33:44,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:44,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:44,425 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:33:44,500 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 09:33:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:33:44,587 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2431 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2431) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_2430 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2430) |c_#valid|)))) is different from true [2022-11-20 09:33:44,650 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2430 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2431 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2430) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2431) |c_#length|))) is different from true [2022-11-20 09:33:44,690 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2432 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2432) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:44,722 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2432 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2432) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:44,794 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2430 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_207 (_ BitVec 32)) (v_ArrVal_2432 (_ BitVec 32)) (v_ArrVal_2431 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2430) v_nondet_tree_~n~0.base_207)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2431) v_nondet_tree_~n~0.base_207 v_ArrVal_2432) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:44,876 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:33:44,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:33:44,922 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 09:33:44,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-20 09:33:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 41 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 81 not checked. [2022-11-20 09:33:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:45,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920610910] [2022-11-20 09:33:45,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920610910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [858820810] [2022-11-20 09:33:45,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:45,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:33:45,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:33:45,520 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:33:45,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-20 09:33:46,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:33:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857349043] [2022-11-20 09:33:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:46,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:46,457 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:46,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 09:33:46,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 1 [2022-11-20 09:33:56,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 09:33:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 09:33:56,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:56,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:33:56,672 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 09:33:56,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:33:56,860 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2703 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2703) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:56,890 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2703 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2703) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:56,963 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2702 (_ BitVec 32)) (v_ArrVal_2703 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_219 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_219) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2702) v_nondet_tree_~n~0.base_219 v_ArrVal_2703)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:33:57,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 09:33:57,056 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 09:33:57,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-20 09:33:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 75 not checked. [2022-11-20 09:33:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:59,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857349043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:59,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:59,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-20 09:33:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454030537] [2022-11-20 09:33:59,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:33:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:33:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=92, Unknown=10, NotChecked=234, Total=380 [2022-11-20 09:33:59,817 INFO L87 Difference]: Start difference. First operand 301 states and 400 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 09:34:00,258 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2432 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2432) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2703 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2703) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:00,435 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2702 (_ BitVec 32)) (v_ArrVal_2703 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_219 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_219) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2702) v_nondet_tree_~n~0.base_219 v_ArrVal_2703)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2430 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_207 (_ BitVec 32)) (v_ArrVal_2432 (_ BitVec 32)) (v_ArrVal_2431 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2430) v_nondet_tree_~n~0.base_207)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2431) v_nondet_tree_~n~0.base_207 v_ArrVal_2432) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:01,258 INFO L93 Difference]: Finished difference Result 302 states and 401 transitions. [2022-11-20 09:34:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:34:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) Word has length 63 [2022-11-20 09:34:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:01,261 INFO L225 Difference]: With dead ends: 302 [2022-11-20 09:34:01,261 INFO L226 Difference]: Without dead ends: 302 [2022-11-20 09:34:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=72, Invalid=170, Unknown=12, NotChecked=396, Total=650 [2022-11-20 09:34:01,262 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 93 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2099 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:01,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 306 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 451 Invalid, 0 Unknown, 2099 Unchecked, 1.0s Time] [2022-11-20 09:34:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-20 09:34:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-11-20 09:34:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 185 states have (on average 1.4216216216216215) internal successors, (263), 236 states have internal predecessors, (263), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 46 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:34:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 400 transitions. [2022-11-20 09:34:01,273 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 400 transitions. Word has length 63 [2022-11-20 09:34:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:01,273 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 400 transitions. [2022-11-20 09:34:01,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 09:34:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 400 transitions. [2022-11-20 09:34:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 09:34:01,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:01,275 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:34:01,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:01,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:01,689 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:34:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1130294982, now seen corresponding path program 4 times [2022-11-20 09:34:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76693331] [2022-11-20 09:34:01,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:01,692 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:02,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:34:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:02,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:02,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:34:02,279 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2860 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2860) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:02,316 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2860 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2860) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:02,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:02,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:34:02,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:34:02,450 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2861 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2861))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:02,487 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2861 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2861)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:02,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:02,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:02,575 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:34:02,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:34:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 107 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 40 not checked. [2022-11-20 09:34:02,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:02,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:02,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76693331] [2022-11-20 09:34:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76693331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [617754320] [2022-11-20 09:34:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:02,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:34:02,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:34:02,876 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:34:02,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-20 09:34:03,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:03,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 09:34:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:03,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:34:03,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:03,716 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_3011 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3011) |c_#length|)))) is different from true [2022-11-20 09:34:03,768 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3011 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3011) |c_#length|))) is different from true [2022-11-20 09:34:03,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:03,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:03,862 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:34:03,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:34:03,905 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3012 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3012) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:03,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3012 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3012) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:04,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:04,031 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:34:04,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:34:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 40 not checked. [2022-11-20 09:34:04,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:06,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [617754320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:06,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:06,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-20 09:34:06,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194455104] [2022-11-20 09:34:06,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:06,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:34:06,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:34:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=46, Unknown=8, NotChecked=152, Total=240 [2022-11-20 09:34:06,039 INFO L87 Difference]: Start difference. First operand 301 states and 400 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 09:34:06,132 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3011 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3011) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2860 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2860) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2861 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2861)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3012 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3012) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:06,773 INFO L93 Difference]: Finished difference Result 303 states and 402 transitions. [2022-11-20 09:34:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:34:06,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 69 [2022-11-20 09:34:06,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:06,775 INFO L225 Difference]: With dead ends: 303 [2022-11-20 09:34:06,775 INFO L226 Difference]: Without dead ends: 303 [2022-11-20 09:34:06,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=42, Invalid=57, Unknown=9, NotChecked=198, Total=306 [2022-11-20 09:34:06,776 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 175 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1554 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:06,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 182 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 273 Invalid, 0 Unknown, 1554 Unchecked, 0.6s Time] [2022-11-20 09:34:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-20 09:34:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2022-11-20 09:34:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 186 states have (on average 1.424731182795699) internal successors, (265), 236 states have internal predecessors, (265), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 47 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:34:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 402 transitions. [2022-11-20 09:34:06,787 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 402 transitions. Word has length 69 [2022-11-20 09:34:06,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:06,787 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 402 transitions. [2022-11-20 09:34:06,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 09:34:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 402 transitions. [2022-11-20 09:34:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 09:34:06,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:06,789 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:34:06,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:07,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:07,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:07,204 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:34:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1130294983, now seen corresponding path program 3 times [2022-11-20 09:34:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:07,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032238930] [2022-11-20 09:34:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:34:07,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:07,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:07,207 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:07,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:07,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:34:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:34:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:07,676 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3160 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3160) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:07,711 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3160) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:07,818 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:34:07,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:34:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 7 not checked. [2022-11-20 09:34:07,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:08,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:08,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032238930] [2022-11-20 09:34:08,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032238930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:08,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [169520597] [2022-11-20 09:34:08,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:34:08,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:34:08,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:34:08,005 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:34:08,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-20 09:34:08,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:34:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:08,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:34:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:08,595 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3308 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3308))) is different from true [2022-11-20 09:34:08,686 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 09:34:08,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 09:34:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 103 trivial. 3 not checked. [2022-11-20 09:34:08,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:08,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [169520597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:08,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:08,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-11-20 09:34:08,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089113641] [2022-11-20 09:34:08,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:08,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:34:08,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:34:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=29, Unknown=3, NotChecked=36, Total=90 [2022-11-20 09:34:08,886 INFO L87 Difference]: Start difference. First operand 302 states and 402 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:34:10,929 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3160 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3160) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3308 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3308)))) is different from true [2022-11-20 09:34:10,932 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3308 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3308))) (exists ((v_ArrVal_3160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3160) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:10,953 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_3308 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3308))))) (exists ((v_ArrVal_3160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3160) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:11,459 INFO L93 Difference]: Finished difference Result 307 states and 416 transitions. [2022-11-20 09:34:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:34:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 69 [2022-11-20 09:34:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:11,462 INFO L225 Difference]: With dead ends: 307 [2022-11-20 09:34:11,462 INFO L226 Difference]: Without dead ends: 307 [2022-11-20 09:34:11,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=40, Unknown=6, NotChecked=102, Total=182 [2022-11-20 09:34:11,463 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 91 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 746 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:11,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 262 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 243 Invalid, 0 Unknown, 746 Unchecked, 0.5s Time] [2022-11-20 09:34:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-20 09:34:11,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2022-11-20 09:34:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 185 states have (on average 1.4216216216216215) internal successors, (263), 236 states have internal predecessors, (263), 40 states have call successors, (40), 18 states have call predecessors, (40), 25 states have return successors, (97), 46 states have call predecessors, (97), 40 states have call successors, (97) [2022-11-20 09:34:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 400 transitions. [2022-11-20 09:34:11,474 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 400 transitions. Word has length 69 [2022-11-20 09:34:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:11,475 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 400 transitions. [2022-11-20 09:34:11,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 09:34:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 400 transitions. [2022-11-20 09:34:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 09:34:11,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:11,477 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:34:11,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:11,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:11,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:11,880 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:34:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 628904546, now seen corresponding path program 5 times [2022-11-20 09:34:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746689945] [2022-11-20 09:34:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:11,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:11,884 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:11,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:12,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 09:34:12,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:34:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:12,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:12,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:34:12,964 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3443 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3443))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:13,017 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3443 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3443)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:13,116 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3443 (_ BitVec 32)) (v_ArrVal_3441 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_248 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3441) v_nondet_tree_~n~0.base_248 v_ArrVal_3443) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_248) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:13,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:13,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 09:34:13,290 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 09:34:13,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-20 09:34:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 90 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 37 not checked. [2022-11-20 09:34:13,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:13,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746689945] [2022-11-20 09:34:13,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746689945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:13,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400222537] [2022-11-20 09:34:13,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:13,817 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:34:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:34:13,818 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:34:13,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-20 09:34:14,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:34:14,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89430859] [2022-11-20 09:34:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:14,425 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:14,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 1 [2022-11-20 09:34:14,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 09:34:39,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 09:34:39,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:34:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:39,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:34:39,226 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3710 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3710))) (exists ((v_ArrVal_3709 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3709) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:39,272 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3711 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3711) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:39,315 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3711 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3711) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:39,403 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3709 (_ BitVec 32)) (v_ArrVal_3710 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_259 (_ BitVec 32)) (v_ArrVal_3711 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_259) (_ bv0 1)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_259 v_ArrVal_3710) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_259 v_ArrVal_3709) nondet_tree_~n~0.base v_ArrVal_3711) |c_#length|))) is different from true [2022-11-20 09:34:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:39,576 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:34:39,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 09:34:39,623 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 09:34:39,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-20 09:34:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 40 not checked. [2022-11-20 09:34:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:41,991 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (or (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_ArrVal_3723 (_ BitVec 1)) (v_nondet_tree_~n~0.base_269 (_ BitVec 32)) (v_nondet_tree_~n~0.base_268 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_268) (_ bv0 1))) (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_268 v_ArrVal_3723) v_nondet_tree_~n~0.base_269) (_ bv0 1)))))) (forall ((v_nondet_tree_~n~0.base_268 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_268) (_ bv0 1))) (forall ((v_ArrVal_3723 (_ BitVec 1)) (v_nondet_tree_~n~0.base_269 (_ BitVec 32))) (or (forall ((v_ArrVal_3722 (_ BitVec 32)) (v_ArrVal_3721 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| v_nondet_tree_~n~0.base_268 v_ArrVal_3721) v_nondet_tree_~n~0.base_269 v_ArrVal_3722) c_nondet_tree_~n~0.base))) (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_268 v_ArrVal_3723) v_nondet_tree_~n~0.base_269) (_ bv0 1))))))))) is different from false [2022-11-20 09:34:41,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89430859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:41,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:41,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-20 09:34:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077745758] [2022-11-20 09:34:42,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:42,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:34:42,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:34:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=60, Unknown=8, NotChecked=168, Total=272 [2022-11-20 09:34:42,001 INFO L87 Difference]: Start difference. First operand 301 states and 400 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 09:34:42,155 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3711 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3711) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3443 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3443)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:34:42,692 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3443 (_ BitVec 32)) (v_ArrVal_3441 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_248 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3441) v_nondet_tree_~n~0.base_248 v_ArrVal_3443) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_248) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3709 (_ BitVec 32)) (v_ArrVal_3710 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_259 (_ BitVec 32)) (v_ArrVal_3711 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_259) (_ bv0 1)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_259 v_ArrVal_3710) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_259 v_ArrVal_3709) nondet_tree_~n~0.base v_ArrVal_3711) |c_#length|)))) is different from true [2022-11-20 09:34:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:43,048 INFO L93 Difference]: Finished difference Result 337 states and 468 transitions. [2022-11-20 09:34:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:34:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) Word has length 65 [2022-11-20 09:34:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:43,052 INFO L225 Difference]: With dead ends: 337 [2022-11-20 09:34:43,052 INFO L226 Difference]: Without dead ends: 337 [2022-11-20 09:34:43,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=54, Invalid=86, Unknown=10, NotChecked=270, Total=420 [2022-11-20 09:34:43,053 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 95 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1587 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:43,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 242 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 318 Invalid, 0 Unknown, 1587 Unchecked, 0.9s Time] [2022-11-20 09:34:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-20 09:34:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 336. [2022-11-20 09:34:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 210 states have (on average 1.3761904761904762) internal successors, (289), 262 states have internal predecessors, (289), 46 states have call successors, (46), 18 states have call predecessors, (46), 29 states have return successors, (133), 55 states have call predecessors, (133), 46 states have call successors, (133) [2022-11-20 09:34:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 468 transitions. [2022-11-20 09:34:43,068 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 468 transitions. Word has length 65 [2022-11-20 09:34:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:43,068 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 468 transitions. [2022-11-20 09:34:43,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 09:34:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 468 transitions. [2022-11-20 09:34:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:34:43,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:43,071 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 09:34:43,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:43,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:43,489 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:34:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1121861291, now seen corresponding path program 4 times [2022-11-20 09:34:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:43,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921617050] [2022-11-20 09:34:43,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:43,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:43,491 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:43,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:34:43,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:34:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:43,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:43,932 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3806 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3806) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:34:43,964 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:34:44,165 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 09:34:44,165 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-20 09:34:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 28 not checked. [2022-11-20 09:34:44,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:44,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:44,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921617050] [2022-11-20 09:34:44,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921617050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:44,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694069169] [2022-11-20 09:34:44,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:34:44,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:34:44,494 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:34:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-20 09:34:45,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:45,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:34:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:45,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:45,182 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3894 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3894))) is different from true [2022-11-20 09:34:45,240 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_281 (_ BitVec 32)) (v_ArrVal_3894 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3894) v_nondet_tree_~n~0.base_281 (_ bv1 1)))) is different from true [2022-11-20 09:34:47,335 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_281 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3894 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3894) v_nondet_tree_~n~0.base_281 (_ bv1 1)))) (and (= (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)) (_ bv0 1)) (= .cse0 |c_#valid|)))) is different from true [2022-11-20 09:34:47,424 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-20 09:34:47,425 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-20 09:34:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 38 not checked. [2022-11-20 09:34:47,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:47,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694069169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:47,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:47,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2022-11-20 09:34:47,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709040604] [2022-11-20 09:34:47,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:47,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 09:34:47,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 09:34:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=6, NotChecked=70, Total=132 [2022-11-20 09:34:47,658 INFO L87 Difference]: Start difference. First operand 336 states and 468 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 09:34:59,889 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_nondet_tree_~n~0.base_281 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3894 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3894) v_nondet_tree_~n~0.base_281 (_ bv1 1)))) (and (= (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)) (_ bv0 1)) (= .cse0 |c_#valid|))))) is different from true [2022-11-20 09:35:04,273 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_270 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3806 (_ BitVec 1))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_270) (_ bv0 1)) (= |c_#valid| (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_270 v_ArrVal_3806) nondet_tree_~n~0.base (_ bv1 1))))) (exists ((v_nondet_tree_~n~0.base_281 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3894 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3894) v_nondet_tree_~n~0.base_281 (_ bv1 1)))) (and (= (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)) (_ bv0 1)) (= .cse0 |c_#valid|))))) is different from true [2022-11-20 09:35:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:04,464 INFO L93 Difference]: Finished difference Result 336 states and 467 transitions. [2022-11-20 09:35:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:35:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 45 [2022-11-20 09:35:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:04,466 INFO L225 Difference]: With dead ends: 336 [2022-11-20 09:35:04,467 INFO L226 Difference]: Without dead ends: 336 [2022-11-20 09:35:04,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=46, Invalid=59, Unknown=13, NotChecked=154, Total=272 [2022-11-20 09:35:04,468 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1187 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:04,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 272 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 1187 Unchecked, 0.5s Time] [2022-11-20 09:35:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-20 09:35:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2022-11-20 09:35:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 209 states have (on average 1.3732057416267942) internal successors, (287), 262 states have internal predecessors, (287), 46 states have call successors, (46), 18 states have call predecessors, (46), 29 states have return successors, (133), 54 states have call predecessors, (133), 46 states have call successors, (133) [2022-11-20 09:35:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 466 transitions. [2022-11-20 09:35:04,481 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 466 transitions. Word has length 45 [2022-11-20 09:35:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:04,481 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 466 transitions. [2022-11-20 09:35:04,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-20 09:35:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 466 transitions. [2022-11-20 09:35:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:35:04,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:04,483 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:04,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:04,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:35:04,897 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:35:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522260, now seen corresponding path program 2 times [2022-11-20 09:35:04,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:04,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322408567] [2022-11-20 09:35:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:04,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:04,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:04,899 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:35:05,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:05,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 09:35:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:05,264 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:35:05,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:35:05,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 09:35:05,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-11-20 09:35:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:06,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322408567] [2022-11-20 09:35:06,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322408567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:06,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:06,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2022-11-20 09:35:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254831596] [2022-11-20 09:35:06,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:06,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:35:06,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:35:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:35:06,450 INFO L87 Difference]: Start difference. First operand 335 states and 466 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 09:35:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:11,435 INFO L93 Difference]: Finished difference Result 387 states and 536 transitions. [2022-11-20 09:35:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:35:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-11-20 09:35:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:11,440 INFO L225 Difference]: With dead ends: 387 [2022-11-20 09:35:11,440 INFO L226 Difference]: Without dead ends: 387 [2022-11-20 09:35:11,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:35:11,447 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 235 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:11,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1146 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2451 Invalid, 0 Unknown, 150 Unchecked, 4.4s Time] [2022-11-20 09:35:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-20 09:35:11,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 354. [2022-11-20 09:35:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 224 states have (on average 1.3839285714285714) internal successors, (310), 277 states have internal predecessors, (310), 48 states have call successors, (48), 19 states have call predecessors, (48), 31 states have return successors, (135), 57 states have call predecessors, (135), 48 states have call successors, (135) [2022-11-20 09:35:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 493 transitions. [2022-11-20 09:35:11,467 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 493 transitions. Word has length 45 [2022-11-20 09:35:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:11,467 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 493 transitions. [2022-11-20 09:35:11,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 09:35:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 493 transitions. [2022-11-20 09:35:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:35:11,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:11,471 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:11,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:11,671 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:35:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522261, now seen corresponding path program 1 times [2022-11-20 09:35:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361651931] [2022-11-20 09:35:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:11,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:11,673 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:11,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:35:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:35:12,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:12,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:35:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:35:12,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:35:12,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:35:12,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:35:12,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-20 09:35:12,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-11-20 09:35:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:12,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:17,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:17,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361651931] [2022-11-20 09:35:17,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361651931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:17,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:17,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-20 09:35:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55767545] [2022-11-20 09:35:17,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:17,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 09:35:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 09:35:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:35:17,920 INFO L87 Difference]: Start difference. First operand 354 states and 493 transitions. Second operand has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:35:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:32,445 INFO L93 Difference]: Finished difference Result 408 states and 567 transitions. [2022-11-20 09:35:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:35:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-11-20 09:35:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:32,448 INFO L225 Difference]: With dead ends: 408 [2022-11-20 09:35:32,448 INFO L226 Difference]: Without dead ends: 406 [2022-11-20 09:35:32,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 09:35:32,450 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 322 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 3987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:32,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1233 Invalid, 3987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3733 Invalid, 0 Unknown, 168 Unchecked, 12.9s Time] [2022-11-20 09:35:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-20 09:35:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 385. [2022-11-20 09:35:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 248 states have (on average 1.3709677419354838) internal successors, (340), 300 states have internal predecessors, (340), 53 states have call successors, (53), 22 states have call predecessors, (53), 33 states have return successors, (140), 62 states have call predecessors, (140), 53 states have call successors, (140) [2022-11-20 09:35:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 533 transitions. [2022-11-20 09:35:32,464 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 533 transitions. Word has length 45 [2022-11-20 09:35:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:32,476 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 533 transitions. [2022-11-20 09:35:32,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:35:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 533 transitions. [2022-11-20 09:35:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 09:35:32,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:32,478 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 09:35:32,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:35:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:32,691 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:35:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2109781290, now seen corresponding path program 6 times [2022-11-20 09:35:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333808029] [2022-11-20 09:35:32,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:32,693 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:32,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:35:33,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 09:35:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:33,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:35:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:33,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:35:33,537 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:35:33,631 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4211 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_316 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4211) v_nondet_tree_~n~0.base_316 (_ bv12 32))) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:35:33,710 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 09:35:33,711 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-20 09:35:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 149 proven. 3 refuted. 4 times theorem prover too weak. 78 trivial. 33 not checked. [2022-11-20 09:35:33,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:35,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:35,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333808029] [2022-11-20 09:35:35,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333808029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:35,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861299057] [2022-11-20 09:35:35,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:35,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:35:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:35:35,246 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:35:35,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-20 09:35:36,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 09:35:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:36,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:35:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:36,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:35:36,569 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (= (store (store |c_old(#length)| c_nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:35:36,576 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#t~ret9.base| (_ BitVec 32))) (= (store (store |c_old(#length)| |c_nondet_tree_#res.base| (_ bv12 32)) |nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:35:36,622 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-20 09:35:36,622 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 2 case distinctions, treesize of input 15 treesize of output 19 [2022-11-20 09:35:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 149 proven. 23 refuted. 0 times theorem prover too weak. 84 trivial. 11 not checked. [2022-11-20 09:35:36,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:37,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861299057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:37,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:37,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-20 09:35:37,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030995422] [2022-11-20 09:35:37,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:35:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:35:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=189, Unknown=10, NotChecked=124, Total=380 [2022-11-20 09:35:37,965 INFO L87 Difference]: Start difference. First operand 385 states and 533 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-20 09:35:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:40,219 INFO L93 Difference]: Finished difference Result 389 states and 543 transitions. [2022-11-20 09:35:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:35:40,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2022-11-20 09:35:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:40,223 INFO L225 Difference]: With dead ends: 389 [2022-11-20 09:35:40,223 INFO L226 Difference]: Without dead ends: 389 [2022-11-20 09:35:40,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=294, Unknown=11, NotChecked=156, Total=552 [2022-11-20 09:35:40,224 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 105 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1296 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:40,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 436 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 728 Invalid, 0 Unknown, 1296 Unchecked, 1.5s Time] [2022-11-20 09:35:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-20 09:35:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 387. [2022-11-20 09:35:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 249 states have (on average 1.3694779116465863) internal successors, (341), 302 states have internal predecessors, (341), 54 states have call successors, (54), 22 states have call predecessors, (54), 33 states have return successors, (146), 62 states have call predecessors, (146), 54 states have call successors, (146) [2022-11-20 09:35:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 541 transitions. [2022-11-20 09:35:40,238 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 541 transitions. Word has length 79 [2022-11-20 09:35:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:40,239 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 541 transitions. [2022-11-20 09:35:40,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 12 states have internal predecessors, (49), 6 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-20 09:35:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 541 transitions. [2022-11-20 09:35:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 09:35:40,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:40,241 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 09:35:40,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:40,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:35:40,656 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:35:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1410861584, now seen corresponding path program 4 times [2022-11-20 09:35:40,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:40,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569266778] [2022-11-20 09:35:40,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:35:40,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:40,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:40,658 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:40,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:35:41,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:35:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:35:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:41,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:35:41,204 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4505 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4505))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:35:41,229 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4506 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4506) |c_#valid|)) is different from true [2022-11-20 09:35:41,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:35:41,288 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4506 (_ BitVec 1)) (v_nondet_tree_~n~0.base_334 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4506) v_nondet_tree_~n~0.base_334 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:35:41,349 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4506 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_334 (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4506) v_nondet_tree_~n~0.base_334 (_ bv1 1)) |c_#valid|))) is different from true [2022-11-20 09:35:45,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:35:45,703 INFO L321 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2022-11-20 09:35:45,703 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 5 case distinctions, treesize of input 25 treesize of output 52 [2022-11-20 09:35:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 9 refuted. 2 times theorem prover too weak. 34 trivial. 55 not checked. [2022-11-20 09:35:45,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:47,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569266778] [2022-11-20 09:35:47,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569266778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1875861743] [2022-11-20 09:35:47,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:35:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:35:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:35:47,449 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:35:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-20 09:35:48,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:35:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:35:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:48,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:35:48,356 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4640 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4640) |c_#valid|)) is different from true [2022-11-20 09:35:48,375 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4641 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4641) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:35:54,533 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4640 (_ BitVec 1)) (v_ArrVal_4641 (_ BitVec 1)) (v_nondet_tree_~n~0.base_355 (_ BitVec 32)) (v_nondet_tree_~n~0.base_356 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4640))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_356)) (= (store (store .cse0 v_nondet_tree_~n~0.base_356 v_ArrVal_4641) v_nondet_tree_~n~0.base_355 (_ bv1 1)) |c_#valid|)))) is different from true [2022-11-20 09:36:03,690 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4640 (_ BitVec 1)) (v_ArrVal_4641 (_ BitVec 1)) (v_nondet_tree_~n~0.base_355 (_ BitVec 32)) (v_nondet_tree_~n~0.base_356 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4640))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_356 v_ArrVal_4641) v_nondet_tree_~n~0.base_355 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_356)) (= .cse0 |c_#valid|))))) is different from true [2022-11-20 09:36:03,848 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-20 09:36:03,849 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 5 case distinctions, treesize of input 76 treesize of output 109 [2022-11-20 09:36:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 9 refuted. 2 times theorem prover too weak. 34 trivial. 55 not checked. [2022-11-20 09:36:03,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:04,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1875861743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:04,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:04,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-20 09:36:04,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750631444] [2022-11-20 09:36:04,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:04,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:36:04,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:36:04,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=49, Unknown=19, NotChecked=198, Total=306 [2022-11-20 09:36:04,253 INFO L87 Difference]: Start difference. First operand 387 states and 541 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-20 09:36:24,134 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4641 (_ BitVec 1)) (v_nondet_tree_~n~0.base_355 (_ BitVec 32))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4641) v_nondet_tree_~n~0.base_355 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4640 (_ BitVec 1)) (v_ArrVal_4641 (_ BitVec 1)) (v_nondet_tree_~n~0.base_355 (_ BitVec 32)) (v_nondet_tree_~n~0.base_356 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4640))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_356 v_ArrVal_4641) v_nondet_tree_~n~0.base_355 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_356)) (= .cse0 |c_#valid|))))) (exists ((v_ArrVal_4506 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_334 (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4506) v_nondet_tree_~n~0.base_334 (_ bv1 1)) |c_#valid|)))) is different from true [2022-11-20 09:36:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:43,543 INFO L93 Difference]: Finished difference Result 393 states and 564 transitions. [2022-11-20 09:36:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:36:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) Word has length 57 [2022-11-20 09:36:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:43,547 INFO L225 Difference]: With dead ends: 393 [2022-11-20 09:36:43,547 INFO L226 Difference]: Without dead ends: 393 [2022-11-20 09:36:43,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.6s TimeCoverageRelationStatistics Valid=81, Invalid=112, Unknown=29, NotChecked=330, Total=552 [2022-11-20 09:36:43,548 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 88 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2386 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 421 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 2386 Unchecked, 0.5s Time] [2022-11-20 09:36:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-20 09:36:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2022-11-20 09:36:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 253 states have (on average 1.3675889328063242) internal successors, (346), 305 states have internal predecessors, (346), 54 states have call successors, (54), 22 states have call predecessors, (54), 34 states have return successors, (164), 64 states have call predecessors, (164), 54 states have call successors, (164) [2022-11-20 09:36:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 564 transitions. [2022-11-20 09:36:43,562 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 564 transitions. Word has length 57 [2022-11-20 09:36:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:43,563 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 564 transitions. [2022-11-20 09:36:43,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (12), 8 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-20 09:36:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 564 transitions. [2022-11-20 09:36:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 09:36:43,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:43,565 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 09:36:43,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:43,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:36:43,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:43,973 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:36:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1034333407, now seen corresponding path program 4 times [2022-11-20 09:36:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:43,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117944967] [2022-11-20 09:36:43,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:43,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:43,975 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:36:44,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:44,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:36:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:44,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:36:44,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:36:44,606 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_4782 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4782))))) is different from true [2022-11-20 09:36:44,636 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:36:44,698 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_376 (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:36:44,753 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4782 (_ BitVec 32)) (v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_377 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_377) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_377 v_ArrVal_4782) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_376 (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:36:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:44,908 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-20 09:36:44,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 31 [2022-11-20 09:36:44,930 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:36:44,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:36:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 63 not checked. [2022-11-20 09:36:44,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:45,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117944967] [2022-11-20 09:36:45,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117944967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2144143617] [2022-11-20 09:36:45,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:45,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:36:45,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:36:45,503 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:36:45,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-20 09:36:46,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 09:36:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:46,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:36:46,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:36:46,556 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4919 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4919))) (exists ((v_ArrVal_4920 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4920))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:36:46,596 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4921 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4921) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:36:46,709 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4921 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_397 v_ArrVal_4921) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_397)))) is different from true [2022-11-20 09:36:46,804 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_398 (_ BitVec 32)) (v_ArrVal_4919 (_ BitVec 32)) (v_ArrVal_4920 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4921 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_398 v_ArrVal_4920) v_nondet_tree_~n~0.base_397)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_398 v_ArrVal_4919) v_nondet_tree_~n~0.base_397 v_ArrVal_4921) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_398)))) is different from true [2022-11-20 09:36:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:47,030 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 09:36:47,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-20 09:36:47,079 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 09:36:47,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-20 09:36:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 66 not checked. [2022-11-20 09:36:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:53,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2144143617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:53,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:53,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-11-20 09:36:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876258640] [2022-11-20 09:36:53,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:36:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:36:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=57, Unknown=9, NotChecked=168, Total=272 [2022-11-20 09:36:53,799 INFO L87 Difference]: Start difference. First operand 392 states and 564 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 09:36:54,367 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_376 (_ bv12 32)) |c_#length|)) (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4921 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_397 v_ArrVal_4921) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_397))))) is different from true [2022-11-20 09:36:54,374 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_398 (_ BitVec 32)) (v_ArrVal_4919 (_ BitVec 32)) (v_ArrVal_4920 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4921 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_398 v_ArrVal_4920) v_nondet_tree_~n~0.base_397)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_398 v_ArrVal_4919) v_nondet_tree_~n~0.base_397 v_ArrVal_4921) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_398)))) (exists ((v_ArrVal_4782 (_ BitVec 32)) (v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_377 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_377) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_377 v_ArrVal_4782) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_376 (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 09:36:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:54,610 INFO L93 Difference]: Finished difference Result 399 states and 576 transitions. [2022-11-20 09:36:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:36:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 63 [2022-11-20 09:36:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:54,613 INFO L225 Difference]: With dead ends: 399 [2022-11-20 09:36:54,614 INFO L226 Difference]: Without dead ends: 399 [2022-11-20 09:36:54,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=57, Invalid=80, Unknown=13, NotChecked=270, Total=420 [2022-11-20 09:36:54,614 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 96 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1700 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:54,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 215 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 305 Invalid, 0 Unknown, 1700 Unchecked, 0.7s Time] [2022-11-20 09:36:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-20 09:36:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2022-11-20 09:36:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 258 states have (on average 1.3565891472868217) internal successors, (350), 310 states have internal predecessors, (350), 55 states have call successors, (55), 22 states have call predecessors, (55), 35 states have return successors, (171), 66 states have call predecessors, (171), 55 states have call successors, (171) [2022-11-20 09:36:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 576 transitions. [2022-11-20 09:36:54,629 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 576 transitions. Word has length 63 [2022-11-20 09:36:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:54,630 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 576 transitions. [2022-11-20 09:36:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 09:36:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 576 transitions. [2022-11-20 09:36:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 09:36:54,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:54,632 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1] [2022-11-20 09:36:54,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:36:54,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:36:55,047 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:36:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1745955578, now seen corresponding path program 7 times [2022-11-20 09:36:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152659993] [2022-11-20 09:36:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:36:55,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:55,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:55,049 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:55,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:36:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 09:36:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:56,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:36:56,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:36:56,135 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5157 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5157))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:36:56,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:36:56,215 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:36:56,317 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:36:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:36:56,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_418 nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_418 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-20 09:36:56,416 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (v_ArrVal_5157 (_ BitVec 32)) (v_nondet_tree_~n~0.base_419 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5157) v_nondet_tree_~n~0.base_418 (_ bv12 32)) v_nondet_tree_~n~0.base_419 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (not (= v_nondet_tree_~n~0.base_418 v_nondet_tree_~n~0.base_419)))) is different from true [2022-11-20 09:36:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:56,607 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-11-20 09:36:56,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 31 [2022-11-20 09:36:56,632 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:36:56,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:36:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 240 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 78 not checked. [2022-11-20 09:36:56,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:57,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:36:59,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152659993] [2022-11-20 09:36:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152659993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659354527] [2022-11-20 09:36:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:36:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:36:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:36:59,337 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:36:59,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-20 09:37:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:37:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:00,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:37:00,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:37:00,939 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5389 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5389))) (exists ((v_ArrVal_5388 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5388))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:37:00,976 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5390 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5390))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:37:00,999 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:37:01,052 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5390 (_ BitVec 32)) (v_nondet_tree_~n~0.base_439 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_439) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_439 v_ArrVal_5390) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:37:01,139 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5388 (_ BitVec 32)) (v_nondet_tree_~n~0.base_440 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5389 (_ BitVec 1)) (v_ArrVal_5390 (_ BitVec 32)) (v_nondet_tree_~n~0.base_439 (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5388) v_nondet_tree_~n~0.base_439 v_ArrVal_5390) v_nondet_tree_~n~0.base_440 (_ bv12 32))) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5389) v_nondet_tree_~n~0.base_439) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:37:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:37:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:37:01,381 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 09:37:01,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-20 09:37:01,433 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 09:37:01,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-20 09:37:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 239 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 81 not checked. [2022-11-20 09:37:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:08,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [659354527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:08,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:08,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-20 09:37:08,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848775233] [2022-11-20 09:37:08,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:08,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:37:08,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:37:08,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=89, Unknown=11, NotChecked=234, Total=380 [2022-11-20 09:37:08,589 INFO L87 Difference]: Start difference. First operand 399 states and 576 transitions. Second operand has 17 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 12 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 09:37:08,867 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:37:09,275 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5390 (_ BitVec 32)) (v_nondet_tree_~n~0.base_439 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_439) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_439 v_ArrVal_5390) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_418 nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_418 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-20 09:37:09,353 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (v_ArrVal_5157 (_ BitVec 32)) (v_nondet_tree_~n~0.base_419 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5157) v_nondet_tree_~n~0.base_418 (_ bv12 32)) v_nondet_tree_~n~0.base_419 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (not (= v_nondet_tree_~n~0.base_418 v_nondet_tree_~n~0.base_419)))) (exists ((v_ArrVal_5388 (_ BitVec 32)) (v_nondet_tree_~n~0.base_440 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5389 (_ BitVec 1)) (v_ArrVal_5390 (_ BitVec 32)) (v_nondet_tree_~n~0.base_439 (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5388) v_nondet_tree_~n~0.base_439 v_ArrVal_5390) v_nondet_tree_~n~0.base_440 (_ bv12 32))) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5389) v_nondet_tree_~n~0.base_439) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:37:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:09,623 INFO L93 Difference]: Finished difference Result 407 states and 591 transitions. [2022-11-20 09:37:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:37:09,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 12 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 12 states have call successors, (17) Word has length 101 [2022-11-20 09:37:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:09,626 INFO L225 Difference]: With dead ends: 407 [2022-11-20 09:37:09,626 INFO L226 Difference]: Without dead ends: 407 [2022-11-20 09:37:09,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=87, Invalid=155, Unknown=16, NotChecked=444, Total=702 [2022-11-20 09:37:09,627 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 176 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2028 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:09,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 226 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 2028 Unchecked, 0.6s Time] [2022-11-20 09:37:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-20 09:37:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-11-20 09:37:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 264 states have (on average 1.3522727272727273) internal successors, (357), 315 states have internal predecessors, (357), 56 states have call successors, (56), 22 states have call predecessors, (56), 36 states have return successors, (178), 69 states have call predecessors, (178), 56 states have call successors, (178) [2022-11-20 09:37:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 591 transitions. [2022-11-20 09:37:09,641 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 591 transitions. Word has length 101 [2022-11-20 09:37:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:09,641 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 591 transitions. [2022-11-20 09:37:09,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 12 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (17), 10 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 09:37:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 591 transitions. [2022-11-20 09:37:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 09:37:09,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:09,643 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 09:37:09,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:09,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:37:10,062 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:37:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -313154347, now seen corresponding path program 5 times [2022-11-20 09:37:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219966222] [2022-11-20 09:37:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:10,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:10,064 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:37:10,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:37:11,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 09:37:11,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:37:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:11,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:37:11,339 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_5563 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5563) |c_#valid|)))) is different from true [2022-11-20 09:37:11,358 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5564 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5564) |c_#valid|)) is different from true [2022-11-20 09:37:11,410 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:37:17,777 INFO L321 Elim1Store]: treesize reduction 123, result has 21.7 percent of original size [2022-11-20 09:37:17,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 56 [2022-11-20 09:37:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 44 refuted. 0 times theorem prover too weak. 66 trivial. 37 not checked. [2022-11-20 09:37:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:22,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:22,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219966222] [2022-11-20 09:37:22,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219966222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:22,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061708587] [2022-11-20 09:37:22,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:22,107 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:37:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:37:22,108 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:37:22,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-20 09:37:22,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:37:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798231079] [2022-11-20 09:37:22,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:22,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:22,836 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:22,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 09:37:22,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 1 [2022-11-20 09:38:10,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 09:38:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:10,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:38:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:10,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:38:10,635 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5891 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5891))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:38:10,671 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5891 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5891)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:38:17,193 INFO L321 Elim1Store]: treesize reduction 153, result has 18.2 percent of original size [2022-11-20 09:38:17,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 47 treesize of output 67 [2022-11-20 09:38:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 124 proven. 34 refuted. 0 times theorem prover too weak. 76 trivial. 33 not checked. [2022-11-20 09:38:17,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:25,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798231079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:25,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:25,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-11-20 09:38:25,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934246946] [2022-11-20 09:38:25,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:38:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:38:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=160, Unknown=18, NotChecked=150, Total=380 [2022-11-20 09:38:25,685 INFO L87 Difference]: Start difference. First operand 407 states and 591 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 09:38:52,902 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5891 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5891)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_5564 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5564) |c_#valid|)))) (exists ((v_nondet_tree_~n~0.base_460 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5563 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_460 v_ArrVal_5563) nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_460) (_ bv0 1)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-20 09:38:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:55,363 INFO L93 Difference]: Finished difference Result 410 states and 595 transitions. [2022-11-20 09:38:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:38:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) Word has length 79 [2022-11-20 09:38:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:55,366 INFO L225 Difference]: With dead ends: 410 [2022-11-20 09:38:55,366 INFO L226 Difference]: Without dead ends: 410 [2022-11-20 09:38:55,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=102, Invalid=311, Unknown=31, NotChecked=258, Total=702 [2022-11-20 09:38:55,367 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 91 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1522 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:55,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 637 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 1522 Unchecked, 0.3s Time] [2022-11-20 09:38:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-11-20 09:38:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 402. [2022-11-20 09:38:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 260 states have (on average 1.353846153846154) internal successors, (352), 312 states have internal predecessors, (352), 56 states have call successors, (56), 22 states have call predecessors, (56), 35 states have return successors, (174), 67 states have call predecessors, (174), 56 states have call successors, (174) [2022-11-20 09:38:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 582 transitions. [2022-11-20 09:38:55,381 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 582 transitions. Word has length 79 [2022-11-20 09:38:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:55,381 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 582 transitions. [2022-11-20 09:38:55,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 12 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (17), 11 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 09:38:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 582 transitions. [2022-11-20 09:38:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 09:38:55,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:55,383 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 09:38:55,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:55,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:38:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:55,811 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:38:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash -526143384, now seen corresponding path program 8 times [2022-11-20 09:38:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:55,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288994960] [2022-11-20 09:38:55,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:38:55,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:55,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:55,813 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:38:55,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:38:56,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:56,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 09:38:56,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:56,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:38:56,644 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:38:56,755 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6055 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6055) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:38:56,809 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6055 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6055) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:38:56,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:38:56,961 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:38:57,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:38:57,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:38:57,068 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_502 nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_502 (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:38:57,109 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6055 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32)) (v_nondet_tree_~n~0.base_503 (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_502 nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_503 v_ArrVal_6055) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_502 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_503) (_ bv0 1)))) is different from true [2022-11-20 09:38:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:38:57,258 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-11-20 09:38:57,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 31 [2022-11-20 09:38:57,283 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:38:57,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:38:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 90 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 75 not checked. [2022-11-20 09:38:57,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:57,742 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 10 treesize of output 8 [2022-11-20 09:39:00,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:00,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288994960] [2022-11-20 09:39:00,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288994960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:00,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1221234172] [2022-11-20 09:39:00,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:39:00,473 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:39:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:39:00,475 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:39:00,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-20 09:39:01,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:39:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:01,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 09:39:01,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:01,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:39:01,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:39:01,678 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6217 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6217))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_6218 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6218))))) is different from true [2022-11-20 09:39:01,733 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6218 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6217 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6217)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6218)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:39:01,771 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6219 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6219) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:39:01,805 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6219 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6219) |c_#length|))) is different from true [2022-11-20 09:39:01,829 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 09:39:01,892 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_523 (_ BitVec 32)) (v_ArrVal_6219 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_523) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_523 v_ArrVal_6219) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 09:39:01,937 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6218 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_523 (_ BitVec 32)) (v_ArrVal_6219 (_ BitVec 32)) (v_nondet_tree_~n~0.base_524 (_ BitVec 32)) (v_ArrVal_6217 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6218) v_nondet_tree_~n~0.base_523)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6217) v_nondet_tree_~n~0.base_523 v_ArrVal_6219) v_nondet_tree_~n~0.base_524 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:39:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:02,085 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 09:39:02,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-20 09:39:02,145 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 09:39:02,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-20 09:39:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 84 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 81 not checked. [2022-11-20 09:39:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:04,617 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (or (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_nondet_tree_~n~0.base_542 (_ BitVec 32)) (v_nondet_tree_~n~0.base_543 (_ BitVec 32)) (v_ArrVal_6231 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_543))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_543 v_ArrVal_6231) v_nondet_tree_~n~0.base_542)))))) (forall ((v_nondet_tree_~n~0.base_543 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_543))) (forall ((v_nondet_tree_~n~0.base_542 (_ BitVec 32)) (v_ArrVal_6231 (_ BitVec 1))) (or (forall ((v_ArrVal_6233 (_ BitVec 32)) (v_nondet_tree_~n~0.base_541 (_ BitVec 32)) (v_ArrVal_6232 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_543 v_ArrVal_6233) v_nondet_tree_~n~0.base_542 v_ArrVal_6232) v_nondet_tree_~n~0.base_541 (_ bv12 32)) c_nondet_tree_~n~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_543 v_ArrVal_6231) v_nondet_tree_~n~0.base_542))))))))) is different from false [2022-11-20 09:39:04,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1221234172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:04,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:04,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-11-20 09:39:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145641807] [2022-11-20 09:39:04,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:39:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:39:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=78, Unknown=14, NotChecked=364, Total=506 [2022-11-20 09:39:04,627 INFO L87 Difference]: Start difference. First operand 402 states and 582 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 11 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (16), 14 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 09:39:04,949 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:39:05,101 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_523 (_ BitVec 32)) (v_ArrVal_6219 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_523) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_523 v_ArrVal_6219) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_502 nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_502 (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 09:39:05,680 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6218 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_523 (_ BitVec 32)) (v_ArrVal_6219 (_ BitVec 32)) (v_nondet_tree_~n~0.base_524 (_ BitVec 32)) (v_ArrVal_6217 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6218) v_nondet_tree_~n~0.base_523)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6217) v_nondet_tree_~n~0.base_523 v_ArrVal_6219) v_nondet_tree_~n~0.base_524 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6055 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32)) (v_nondet_tree_~n~0.base_503 (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_502 nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_503 v_ArrVal_6055) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_502 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_503) (_ bv0 1))))) is different from true [2022-11-20 09:39:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:05,854 INFO L93 Difference]: Finished difference Result 407 states and 607 transitions. [2022-11-20 09:39:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:39:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 11 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (16), 14 states have call predecessors, (16), 11 states have call successors, (16) Word has length 73 [2022-11-20 09:39:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:05,856 INFO L225 Difference]: With dead ends: 407 [2022-11-20 09:39:05,856 INFO L226 Difference]: Without dead ends: 407 [2022-11-20 09:39:05,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=63, Invalid=94, Unknown=17, NotChecked=528, Total=702 [2022-11-20 09:39:05,857 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 174 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2524 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:05,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 251 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 404 Invalid, 0 Unknown, 2524 Unchecked, 0.9s Time] [2022-11-20 09:39:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-20 09:39:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-11-20 09:39:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 264 states have (on average 1.3522727272727273) internal successors, (357), 315 states have internal predecessors, (357), 56 states have call successors, (56), 22 states have call predecessors, (56), 36 states have return successors, (194), 69 states have call predecessors, (194), 56 states have call successors, (194) [2022-11-20 09:39:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 607 transitions. [2022-11-20 09:39:05,884 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 607 transitions. Word has length 73 [2022-11-20 09:39:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:05,884 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 607 transitions. [2022-11-20 09:39:05,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 11 states have call successors, (17), 3 states have call predecessors, (17), 9 states have return successors, (16), 14 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 09:39:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 607 transitions. [2022-11-20 09:39:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 09:39:05,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:05,887 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 09:39:05,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:06,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:39:06,303 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:39:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -526143385, now seen corresponding path program 6 times [2022-11-20 09:39:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798588927] [2022-11-20 09:39:06,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:39:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:06,306 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:39:06,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:39:07,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 09:39:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:07,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:39:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:39:07,345 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6385 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6385) |c_#valid|)) is different from true [2022-11-20 09:39:07,370 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6386 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6386))) is different from true [2022-11-20 09:39:07,396 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6387 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6387))) is different from true [2022-11-20 09:39:07,466 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:39:07,480 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_544 (_ BitVec 32)) (v_ArrVal_6386 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6386) v_nondet_tree_~n~0.base_544 (_ bv1 1)))) is different from true [2022-11-20 09:39:07,543 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_544 (_ BitVec 32)) (v_nondet_tree_~n~0.base_545 (_ BitVec 32)) (v_ArrVal_6386 (_ BitVec 1)) (v_ArrVal_6385 (_ BitVec 1))) (and (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6385) v_nondet_tree_~n~0.base_545 v_ArrVal_6386) v_nondet_tree_~n~0.base_544 (_ bv1 1))) (= (bvadd (_ bv1 1) (select |c_#valid| v_nondet_tree_~n~0.base_545)) (_ bv0 1)))) is different from true [2022-11-20 09:39:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:07,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:08,005 INFO L321 Elim1Store]: treesize reduction 70, result has 32.0 percent of original size [2022-11-20 09:39:08,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 45 [2022-11-20 09:39:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 84 proven. 25 refuted. 3 times theorem prover too weak. 57 trivial. 53 not checked. [2022-11-20 09:39:08,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:08,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798588927] [2022-11-20 09:39:08,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798588927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:08,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2040676381] [2022-11-20 09:39:08,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:39:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:39:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:39:08,565 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:39:08,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-20 09:39:09,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:39:09,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991020518] [2022-11-20 09:39:09,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:39:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:39:09,833 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:39:09,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-20 09:39:09,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 1 [2022-11-20 09:39:28,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 09:39:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:39:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:28,553 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6702 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6702))) is different from true [2022-11-20 09:39:28,580 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6703 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6703) |c_#valid|)) is different from true [2022-11-20 09:39:28,606 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6704 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6704) |c_#valid|)) is different from true [2022-11-20 09:39:28,665 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_6703 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6703) v_nondet_tree_~n~0.base_574 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 09:39:28,739 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6702 (_ BitVec 1)) (v_nondet_tree_~n~0.base_544 (_ BitVec 32)) (v_nondet_tree_~n~0.base_575 (_ BitVec 32)) (v_ArrVal_6386 (_ BitVec 1))) (and (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6702) v_nondet_tree_~n~0.base_575 v_ArrVal_6386) v_nondet_tree_~n~0.base_544 (_ bv1 1))) (= (_ bv0 1) (bvadd (select |c_#valid| v_nondet_tree_~n~0.base_575) (_ bv1 1))))) is different from true [2022-11-20 09:39:29,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:29,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:29,079 INFO L321 Elim1Store]: treesize reduction 70, result has 32.0 percent of original size [2022-11-20 09:39:29,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 45 [2022-11-20 09:39:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 104 proven. 18 refuted. 3 times theorem prover too weak. 55 trivial. 42 not checked. [2022-11-20 09:39:29,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:29,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991020518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:29,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:29,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-20 09:39:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650872550] [2022-11-20 09:39:29,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:39:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:29,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:39:29,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=65, Unknown=12, NotChecked=286, Total=420 [2022-11-20 09:39:29,596 INFO L87 Difference]: Start difference. First operand 407 states and 607 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 09:39:29,780 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_574 (_ BitVec 32)) (v_ArrVal_6703 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6703) v_nondet_tree_~n~0.base_574 (_ bv1 1)) |c_#valid|)) (exists ((v_nondet_tree_~n~0.base_544 (_ BitVec 32)) (v_ArrVal_6386 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6386) v_nondet_tree_~n~0.base_544 (_ bv1 1))))) is different from true [2022-11-20 09:39:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:30,815 INFO L93 Difference]: Finished difference Result 414 states and 633 transitions. [2022-11-20 09:39:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:39:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) Word has length 73 [2022-11-20 09:39:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:30,819 INFO L225 Difference]: With dead ends: 414 [2022-11-20 09:39:30,819 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 09:39:30,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=104, Unknown=15, NotChecked=396, Total=600 [2022-11-20 09:39:30,819 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 94 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2347 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:30,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 275 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 2347 Unchecked, 0.5s Time] [2022-11-20 09:39:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 09:39:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 406. [2022-11-20 09:39:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 263 states have (on average 1.349809885931559) internal successors, (355), 315 states have internal predecessors, (355), 56 states have call successors, (56), 22 states have call predecessors, (56), 36 states have return successors, (194), 68 states have call predecessors, (194), 56 states have call successors, (194) [2022-11-20 09:39:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 605 transitions. [2022-11-20 09:39:30,834 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 605 transitions. Word has length 73 [2022-11-20 09:39:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:30,835 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 605 transitions. [2022-11-20 09:39:30,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-20 09:39:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 605 transitions. [2022-11-20 09:39:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 09:39:30,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:30,837 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:30,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:31,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:31,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:31,260 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting minErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:39:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1454919710, now seen corresponding path program 1 times [2022-11-20 09:39:31,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:31,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199333891] [2022-11-20 09:39:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:39:31,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:31,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:31,262 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:39:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:39:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:39:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:39:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:39:32,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:33,445 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 8 treesize of output 6 [2022-11-20 09:39:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:39:33,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199333891] [2022-11-20 09:39:33,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199333891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:33,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:33,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-20 09:39:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047426296] [2022-11-20 09:39:33,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:39:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:39:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:39:33,590 INFO L87 Difference]: Start difference. First operand 406 states and 605 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:39:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:39,531 INFO L93 Difference]: Finished difference Result 428 states and 637 transitions. [2022-11-20 09:39:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:39:39,532 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-11-20 09:39:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:39,533 INFO L225 Difference]: With dead ends: 428 [2022-11-20 09:39:39,533 INFO L226 Difference]: Without dead ends: 428 [2022-11-20 09:39:39,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:39:39,534 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 194 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:39,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 534 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 929 Invalid, 0 Unknown, 313 Unchecked, 5.2s Time] [2022-11-20 09:39:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-20 09:39:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 412. [2022-11-20 09:39:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 267 states have (on average 1.3370786516853932) internal successors, (357), 320 states have internal predecessors, (357), 56 states have call successors, (56), 23 states have call predecessors, (56), 38 states have return successors, (201), 68 states have call predecessors, (201), 56 states have call successors, (201) [2022-11-20 09:39:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 614 transitions. [2022-11-20 09:39:39,549 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 614 transitions. Word has length 48 [2022-11-20 09:39:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:39,550 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 614 transitions. [2022-11-20 09:39:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:39:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 614 transitions. [2022-11-20 09:39:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 09:39:39,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:39,552 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:39,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:39:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:39,772 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:39:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1592442388, now seen corresponding path program 3 times [2022-11-20 09:39:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598250320] [2022-11-20 09:39:39,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:39:39,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:39,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:39,774 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:39:39,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:39:40,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:39:40,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 09:39:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:40,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:39:40,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:39:40,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:39:40,762 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6849 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_6849))) (exists ((v_ArrVal_6850 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_6850) |c_#memory_$Pointer$.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:39:40,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:40,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:39:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:40,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:39:40,829 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:39:40,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:39:40,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:39:40,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:39:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-20 09:39:41,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-11-20 09:39:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-20 09:39:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:43,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598250320] [2022-11-20 09:39:43,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598250320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:43,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850926057] [2022-11-20 09:39:43,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:39:43,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:39:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:39:43,523 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:39:43,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-20 09:39:44,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:39:44,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:44,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 09:39:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:44,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:39:44,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 09:39:45,155 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 09:39:45,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 09:39:45,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 09:39:45,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 09:39:45,353 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| c_nondet_tree_~n~0.base v_arrayElimArr_3)) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= (store |c_old(#memory_$Pointer$.base)| c_nondet_tree_~n~0.base v_arrayElimArr_4) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-20 09:39:45,369 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.offset)| |c_nondet_tree_#res.base| v_arrayElimArr_3) |c_#memory_$Pointer$.offset|) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_nondet_tree_#res.base| v_arrayElimArr_4))))) is different from true [2022-11-20 09:39:45,408 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:39:45,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 09:39:45,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 09:39:45,457 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:39:45,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 09:39:45,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 09:39:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:45,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:45,634 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 09:39:45,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 09:39:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:39:45,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:39:45,649 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-20 09:39:45,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-20 09:39:46,578 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 09:39:46,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 20 [2022-11-20 09:39:46,586 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 09:39:46,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 10 [2022-11-20 09:39:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-11-20 09:39:46,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:52,615 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:39:52,615 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-20 09:39:52,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 09:39:52,635 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-20 09:39:52,662 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset))) (and (forall ((|v_nondet_tree_#t~ret9.base_676| (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_nondet_tree_#t~ret9.base_676| v_arrayElimArr_5) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_5 (_ bv4 32)) (_ bv0 32))))) (forall ((|v_nondet_tree_#t~ret9.base_676| (_ BitVec 32)) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_nondet_tree_#t~ret9.base_676| v_arrayElimArr_6) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_6 (_ bv4 32)) (_ bv0 32))))))) is different from false [2022-11-20 09:39:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850926057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:52,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:52,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 39 [2022-11-20 09:39:52,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407239225] [2022-11-20 09:39:52,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:52,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 09:39:52,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 09:39:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1219, Unknown=14, NotChecked=292, Total=1640 [2022-11-20 09:39:52,667 INFO L87 Difference]: Start difference. First operand 412 states and 614 transitions. Second operand has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 09:39:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:59,898 INFO L93 Difference]: Finished difference Result 477 states and 700 transitions. [2022-11-20 09:39:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 09:39:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-11-20 09:39:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:59,902 INFO L225 Difference]: With dead ends: 477 [2022-11-20 09:39:59,902 INFO L226 Difference]: Without dead ends: 477 [2022-11-20 09:39:59,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=332, Invalid=3693, Unknown=23, NotChecked=508, Total=4556 [2022-11-20 09:39:59,904 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 306 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 2094 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1468 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:59,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 2094 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2542 Invalid, 0 Unknown, 1468 Unchecked, 5.1s Time] [2022-11-20 09:39:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-20 09:39:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 432. [2022-11-20 09:39:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 282 states have (on average 1.326241134751773) internal successors, (374), 335 states have internal predecessors, (374), 59 states have call successors, (59), 25 states have call predecessors, (59), 40 states have return successors, (205), 71 states have call predecessors, (205), 59 states have call successors, (205) [2022-11-20 09:39:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 638 transitions. [2022-11-20 09:39:59,919 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 638 transitions. Word has length 45 [2022-11-20 09:39:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:59,919 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 638 transitions. [2022-11-20 09:39:59,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 09:39:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 638 transitions. [2022-11-20 09:39:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 09:39:59,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:59,921 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 8, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1] [2022-11-20 09:39:59,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:00,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 09:40:00,335 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-20 09:40:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2061755062, now seen corresponding path program 5 times [2022-11-20 09:40:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:00,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695879370] [2022-11-20 09:40:00,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:00,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:00,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:00,337 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:40:00,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/mathsat -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 09:40:02,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 09:40:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:40:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:02,400 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:40:02,426 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7250 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7250) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:40:02,453 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7250 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7250) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:40:02,475 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7251 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7251) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:40:02,499 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7252 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7252))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:40:02,529 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7252 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7252)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 09:40:02,584 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7251 (_ BitVec 1)) (v_ArrVal_7252 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7251))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_637)) (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_637 v_ArrVal_7252)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 09:40:02,689 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7251 (_ BitVec 1)) (v_ArrVal_7250 (_ BitVec 1)) (v_nondet_tree_~n~0.base_638 (_ BitVec 32)) (v_ArrVal_7252 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_637 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_638 v_ArrVal_7250))) (let ((.cse1 (store .cse0 nondet_tree_~n~0.base v_ArrVal_7251))) (and (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_638)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_637)) (= (store .cse1 v_nondet_tree_~n~0.base_637 v_ArrVal_7252) |c_#valid|))))) is different from true [2022-11-20 09:40:02,927 INFO L321 Elim1Store]: treesize reduction 132, result has 29.4 percent of original size [2022-11-20 09:40:02,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 87 treesize of output 128 [2022-11-20 09:40:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 66 not checked. [2022-11-20 09:40:03,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:05,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:05,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695879370] [2022-11-20 09:40:05,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695879370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:40:05,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [415805462] [2022-11-20 09:40:05,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:05,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 09:40:05,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 09:40:05,325 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 09:40:05,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-20 09:40:06,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:40:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204965096] [2022-11-20 09:40:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:06,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:06,343 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:40:06,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 09:40:06,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc22c523-09eb-448f-985b-d36940a365ce/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 1