./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 8393723b 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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro --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-8393723 [2022-11-18 20:40:38,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:40:38,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:40:38,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:40:38,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:40:38,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:40:38,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:40:38,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:40:38,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:40:38,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:40:38,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:40:38,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:40:38,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:40:38,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:40:38,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:40:38,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:40:38,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:40:38,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:40:38,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:40:38,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:40:38,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:40:38,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:40:38,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:40:38,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:40:38,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:40:38,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:40:38,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:40:38,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:40:38,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:40:38,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:40:38,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:40:38,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:40:38,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:40:38,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:40:38,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:40:38,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:40:38,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:40:38,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:40:38,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:40:38,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:40:38,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:40:38,324 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-18 20:40:38,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:40:38,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:40:38,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:40:38,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:40:38,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:40:38,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:40:38,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:40:38,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:40:38,350 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:40:38,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:40:38,351 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:40:38,351 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:40:38,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:40:38,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:40:38,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:40:38,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:40:38,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:40:38,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:40:38,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:40:38,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:40:38,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:40:38,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:40:38,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:40:38,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:40:38,354 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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-18 20:40:38,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:40:38,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:40:38,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:40:38,681 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:40:38,683 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:40:38,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-18 20:40:38,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/d269d9fd7/7405c3836b584e60a83d4de9f78d3fc3/FLAG8737db417 [2022-11-18 20:40:39,270 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:40:39,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-18 20:40:39,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/d269d9fd7/7405c3836b584e60a83d4de9f78d3fc3/FLAG8737db417 [2022-11-18 20:40:39,602 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/d269d9fd7/7405c3836b584e60a83d4de9f78d3fc3 [2022-11-18 20:40:39,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:40:39,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:40:39,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:39,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:40:39,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:40:39,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:39" (1/1) ... [2022-11-18 20:40:39,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79083942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:39, skipping insertion in model container [2022-11-18 20:40:39,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:39" (1/1) ... [2022-11-18 20:40:39,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:40:39,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:40:39,863 WARN L234 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_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-18 20:40:39,895 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:39,897 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:39,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:39,950 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) [2022-11-18 20:40:39,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@216a20ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:39, skipping insertion in model container [2022-11-18 20:40:39,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:39,952 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:40:39,956 INFO L158 Benchmark]: Toolchain (without parser) took 344.96ms. Allocated memory is still 140.5MB. Free memory was 108.2MB in the beginning and 117.6MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:40:39,958 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 42.3MB in the beginning and 42.2MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:40:39,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.02ms. Allocated memory is still 140.5MB. Free memory was 108.2MB in the beginning and 117.6MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:40:39,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 42.3MB in the beginning and 42.2MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.02ms. Allocated memory is still 140.5MB. Free memory was 108.2MB in the beginning and 117.6MB in the end (delta: -9.4MB). Peak memory consumption was 8.4MB. 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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro --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-8393723 [2022-11-18 20:40:42,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:40:42,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:40:42,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:40:42,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:40:42,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:40:42,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:40:42,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:40:42,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:40:42,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:40:42,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:40:42,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:40:42,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:40:42,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:40:42,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:40:42,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:40:42,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:40:42,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:40:42,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:40:42,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:40:42,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:40:42,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:40:42,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:40:42,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:40:42,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:40:42,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:40:42,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:40:42,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:40:42,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:40:42,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:40:42,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:40:42,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:40:42,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:40:42,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:40:42,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:40:42,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:40:42,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:40:42,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:40:42,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:40:42,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:40:42,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:40:42,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-18 20:40:42,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:40:42,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:40:42,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:40:42,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:40:42,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:40:42,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:40:42,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:40:42,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:40:42,196 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:40:42,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:40:42,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:40:42,197 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:40:42,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:40:42,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:40:42,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:40:42,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:40:42,199 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:40:42,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:40:42,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:40:42,199 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:40:42,200 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:40:42,200 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:40:42,200 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:40:42,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:40:42,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:40:42,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:40:42,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:40:42,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:40:42,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:40:42,202 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:40:42,202 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:40:42,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:40:42,203 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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-18 20:40:42,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:40:42,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:40:42,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:40:42,632 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:40:42,633 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:40:42,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-18 20:40:42,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/5d9a59ce7/56133a5e8d2842259ed8390bc7eadff0/FLAG46a673f45 [2022-11-18 20:40:43,255 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:40:43,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-18 20:40:43,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/5d9a59ce7/56133a5e8d2842259ed8390bc7eadff0/FLAG46a673f45 [2022-11-18 20:40:43,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/data/5d9a59ce7/56133a5e8d2842259ed8390bc7eadff0 [2022-11-18 20:40:43,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:40:43,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:40:43,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:43,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:40:43,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:40:43,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:43" (1/1) ... [2022-11-18 20:40:43,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fbbf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:43, skipping insertion in model container [2022-11-18 20:40:43,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:40:43" (1/1) ... [2022-11-18 20:40:43,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:40:43,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:40:43,886 WARN L234 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_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-18 20:40:43,918 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:43,920 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:43,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:44,003 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:40:44,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:40:44,020 WARN L234 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_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-18 20:40:44,026 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:44,027 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:44,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:44,046 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:40:44,058 WARN L234 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_f953c45f-057f-4c1f-981a-c22e75e099ae/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-18 20:40:44,063 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:44,065 WARN L1568 CHandler]: Possible shadowing of function min [2022-11-18 20:40:44,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:40:44,092 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:40:44,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44 WrapperNode [2022-11-18 20:40:44,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:40:44,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:40:44,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:40:44,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:40:44,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,141 INFO L138 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-18 20:40:44,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:40:44,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:40:44,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:40:44,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:40:44,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,204 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:40:44,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:40:44,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:40:44,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:40:44,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (1/1) ... [2022-11-18 20:40:44,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:40:44,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:44,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:40:44,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:40:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-11-18 20:40:44,297 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-11-18 20:40:44,297 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-11-18 20:40:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-11-18 20:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-18 20:40:44,298 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-18 20:40:44,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:40:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-18 20:40:44,299 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-18 20:40:44,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-11-18 20:40:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-11-18 20:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:40:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:40:44,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:40:44,300 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-11-18 20:40:44,301 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-11-18 20:40:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:40:44,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:40:44,415 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:40:44,418 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:40:45,251 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:40:45,259 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:40:45,259 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:40:45,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:40:45 BoogieIcfgContainer [2022-11-18 20:40:45,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:40:45,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:40:45,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:40:45,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:40:45,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:40:43" (1/3) ... [2022-11-18 20:40:45,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fac1b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:40:45, skipping insertion in model container [2022-11-18 20:40:45,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:40:44" (2/3) ... [2022-11-18 20:40:45,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fac1b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:40:45, skipping insertion in model container [2022-11-18 20:40:45,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:40:45" (3/3) ... [2022-11-18 20:40:45,273 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2022-11-18 20:40:45,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:40:45,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-11-18 20:40:45,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:40:45,363 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;@2afd7cde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:40:45,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-18 20:40:45,368 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) [2022-11-18 20:40:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:40:45,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:45,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:40:45,376 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)] === [2022-11-18 20:40:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash 120433579, now seen corresponding path program 1 times [2022-11-18 20:40:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:45,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772169456] [2022-11-18 20:40:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:45,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:45,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:45,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:45,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:40:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:40:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:45,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:45,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772169456] [2022-11-18 20:40:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772169456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:45,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:45,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:40:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961947187] [2022-11-18 20:40:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:45,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:40:45,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:45,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:40:45,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:40:45,604 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) [2022-11-18 20:40:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:45,924 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2022-11-18 20:40:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:40:45,928 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 [2022-11-18 20:40:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:45,938 INFO L225 Difference]: With dead ends: 175 [2022-11-18 20:40:45,939 INFO L226 Difference]: Without dead ends: 172 [2022-11-18 20:40:45,946 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 [2022-11-18 20:40:45,952 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 [2022-11-18 20:40:45,955 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] [2022-11-18 20:40:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-18 20:40:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2022-11-18 20:40:46,020 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) [2022-11-18 20:40:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-11-18 20:40:46,035 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 5 [2022-11-18 20:40:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:46,036 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-11-18 20:40:46,036 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) [2022-11-18 20:40:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-11-18 20:40:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:40:46,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:46,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:40:46,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:46,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:46,249 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)] === [2022-11-18 20:40:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash 120433580, now seen corresponding path program 1 times [2022-11-18 20:40:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:46,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552177753] [2022-11-18 20:40:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:46,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:46,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:40:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:46,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:46,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:46,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552177753] [2022-11-18 20:40:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552177753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:46,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:40:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314083271] [2022-11-18 20:40:46,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:46,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:40:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:40:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:40:46,352 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) [2022-11-18 20:40:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:46,655 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-18 20:40:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:40:46,659 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 [2022-11-18 20:40:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:46,661 INFO L225 Difference]: With dead ends: 169 [2022-11-18 20:40:46,661 INFO L226 Difference]: Without dead ends: 169 [2022-11-18 20:40:46,661 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 [2022-11-18 20:40:46,662 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:46,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:40:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-18 20:40:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-18 20:40:46,678 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) [2022-11-18 20:40:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-11-18 20:40:46,685 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 5 [2022-11-18 20:40:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:46,686 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-11-18 20:40:46,686 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) [2022-11-18 20:40:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-11-18 20:40:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:40:46,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:46,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:46,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:46,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:40:46,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash 854953177, now seen corresponding path program 1 times [2022-11-18 20:40:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234048309] [2022-11-18 20:40:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:46,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:46,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:40:46,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:47,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:47,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234048309] [2022-11-18 20:40:47,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234048309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:47,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:47,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:40:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018030726] [2022-11-18 20:40:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:47,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:40:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:40:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:40:47,083 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) [2022-11-18 20:40:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:47,326 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-11-18 20:40:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:40:47,329 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 [2022-11-18 20:40:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:47,331 INFO L225 Difference]: With dead ends: 233 [2022-11-18 20:40:47,331 INFO L226 Difference]: Without dead ends: 233 [2022-11-18 20:40:47,331 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 [2022-11-18 20:40:47,332 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 91 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-18 20:40:47,333 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] [2022-11-18 20:40:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-18 20:40:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 177. [2022-11-18 20:40:47,353 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) [2022-11-18 20:40:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-11-18 20:40:47,355 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 11 [2022-11-18 20:40:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:47,355 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-11-18 20:40:47,355 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) [2022-11-18 20:40:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-11-18 20:40:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:40:47,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:47,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:47,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:47,568 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)] === [2022-11-18 20:40:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 873486780, now seen corresponding path program 1 times [2022-11-18 20:40:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:47,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994470448] [2022-11-18 20:40:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:47,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:47,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:47,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:40:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:47,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:47,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:47,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:47,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994470448] [2022-11-18 20:40:47,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994470448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:47,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:47,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:40:47,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879352463] [2022-11-18 20:40:47,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:47,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:40:47,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:40:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:40:47,709 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) [2022-11-18 20:40:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:48,311 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-18 20:40:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:40:48,317 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 [2022-11-18 20:40:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:48,318 INFO L225 Difference]: With dead ends: 181 [2022-11-18 20:40:48,318 INFO L226 Difference]: Without dead ends: 181 [2022-11-18 20:40:48,319 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 [2022-11-18 20:40:48,319 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 [2022-11-18 20:40:48,320 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] [2022-11-18 20:40:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-18 20:40:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-11-18 20:40:48,337 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) [2022-11-18 20:40:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2022-11-18 20:40:48,339 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 11 [2022-11-18 20:40:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:48,340 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2022-11-18 20:40:48,341 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) [2022-11-18 20:40:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2022-11-18 20:40:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:40:48,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:48,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:48,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-18 20:40:48,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:48,555 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)] === [2022-11-18 20:40:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 873486781, now seen corresponding path program 1 times [2022-11-18 20:40:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585701089] [2022-11-18 20:40:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:48,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:48,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:48,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:48,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:40:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:48,644 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 [2022-11-18 20:40:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:48,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:48,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585701089] [2022-11-18 20:40:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585701089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:48,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:48,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:40:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737259641] [2022-11-18 20:40:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:40:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:40:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:40:48,719 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) [2022-11-18 20:40:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:49,415 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2022-11-18 20:40:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:40:49,416 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 [2022-11-18 20:40:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:49,417 INFO L225 Difference]: With dead ends: 185 [2022-11-18 20:40:49,417 INFO L226 Difference]: Without dead ends: 185 [2022-11-18 20:40:49,418 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 [2022-11-18 20:40:49,419 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:49,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 177 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:40:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-18 20:40:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-18 20:40:49,430 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) [2022-11-18 20:40:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-11-18 20:40:49,432 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 11 [2022-11-18 20:40:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:49,433 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-11-18 20:40:49,433 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) [2022-11-18 20:40:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-11-18 20:40:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:40:49,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:49,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:49,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:49,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:49,646 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:40:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1280810199, now seen corresponding path program 1 times [2022-11-18 20:40:49,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:49,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018763952] [2022-11-18 20:40:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:49,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:49,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:40:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:49,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:40:49,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018763952] [2022-11-18 20:40:49,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018763952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:40:49,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:40:49,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:40:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988832741] [2022-11-18 20:40:49,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:40:49,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:40:49,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:40:49,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:40:49,857 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) [2022-11-18 20:40:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:50,063 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-11-18 20:40:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:40:50,064 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 [2022-11-18 20:40:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:50,066 INFO L225 Difference]: With dead ends: 242 [2022-11-18 20:40:50,066 INFO L226 Difference]: Without dead ends: 242 [2022-11-18 20:40:50,066 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 [2022-11-18 20:40:50,067 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 [2022-11-18 20:40:50,067 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] [2022-11-18 20:40:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-18 20:40:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2022-11-18 20:40:50,078 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) [2022-11-18 20:40:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2022-11-18 20:40:50,080 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 17 [2022-11-18 20:40:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:50,080 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2022-11-18 20:40:50,080 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) [2022-11-18 20:40:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2022-11-18 20:40:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:40:50,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:50,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:50,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:50,294 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)] === [2022-11-18 20:40:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1539264760, now seen corresponding path program 1 times [2022-11-18 20:40:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:50,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096058261] [2022-11-18 20:40:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:50,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:50,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:50,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:40:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:50,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:50,600 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 [2022-11-18 20:40:50,645 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 [2022-11-18 20:40:50,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:40:50,773 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 [2022-11-18 20:40:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-18 20:40:50,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:50,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096058261] [2022-11-18 20:40:50,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096058261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:50,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [987401176] [2022-11-18 20:40:50,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:50,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:40:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:40:51,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:40:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-18 20:40:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:40:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:51,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:51,331 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 [2022-11-18 20:40:51,417 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:40:51,417 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 [2022-11-18 20:40:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-18 20:40:51,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:51,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [987401176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:51,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:40:51,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-18 20:40:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247790736] [2022-11-18 20:40:51,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:40:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:40:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-18 20:40:51,599 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) [2022-11-18 20:40:53,835 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 [2022-11-18 20:40:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:54,176 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2022-11-18 20:40:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:40:54,178 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 [2022-11-18 20:40:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:54,179 INFO L225 Difference]: With dead ends: 210 [2022-11-18 20:40:54,179 INFO L226 Difference]: Without dead ends: 210 [2022-11-18 20:40:54,180 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 [2022-11-18 20:40:54,180 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 [2022-11-18 20:40:54,181 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] [2022-11-18 20:40:54,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-18 20:40:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2022-11-18 20:40:54,190 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) [2022-11-18 20:40:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2022-11-18 20:40:54,198 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 29 [2022-11-18 20:40:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:54,198 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2022-11-18 20:40:54,198 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) [2022-11-18 20:40:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2022-11-18 20:40:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:40:54,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:54,203 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:54,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-18 20:40:54,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:54,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:54,616 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)] === [2022-11-18 20:40:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1070284721, now seen corresponding path program 1 times [2022-11-18 20:40:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:54,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277047326] [2022-11-18 20:40:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:54,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:54,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:40:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:54,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:54,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:40:54,892 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 [2022-11-18 20:40:54,948 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 [2022-11-18 20:40:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:55,046 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 [2022-11-18 20:40:55,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:40:55,058 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 [2022-11-18 20:40:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-18 20:40:55,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:56,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277047326] [2022-11-18 20:40:56,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277047326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119019618] [2022-11-18 20:40:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:40:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:40:56,879 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:40:56,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-18 20:40:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:40:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:57,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:40:57,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:40:57,241 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 [2022-11-18 20:40:57,279 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 [2022-11-18 20:40:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:57,350 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 [2022-11-18 20:40:57,365 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:40:57,365 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 [2022-11-18 20:40:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-18 20:40:57,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119019618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:57,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:40:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:40:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605229527] [2022-11-18 20:40:57,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:57,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:40:57,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:40:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-18 20:40:57,572 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) [2022-11-18 20:40:57,993 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 [2022-11-18 20:40:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:58,539 INFO L93 Difference]: Finished difference Result 227 states and 281 transitions. [2022-11-18 20:40:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:40:58,540 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 [2022-11-18 20:40:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:58,542 INFO L225 Difference]: With dead ends: 227 [2022-11-18 20:40:58,542 INFO L226 Difference]: Without dead ends: 227 [2022-11-18 20:40:58,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-18 20:40:58,543 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, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 848 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:58,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 225 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 438 Invalid, 0 Unknown, 848 Unchecked, 0.9s Time] [2022-11-18 20:40:58,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-18 20:40:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-11-18 20:40:58,565 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) [2022-11-18 20:40:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 272 transitions. [2022-11-18 20:40:58,568 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 272 transitions. Word has length 25 [2022-11-18 20:40:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:58,569 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 272 transitions. [2022-11-18 20:40:58,569 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) [2022-11-18 20:40:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 272 transitions. [2022-11-18 20:40:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:40:58,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:58,573 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] [2022-11-18 20:40:58,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:58,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:58,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:40:58,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:40:58,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050227, now seen corresponding path program 1 times [2022-11-18 20:40:58,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:40:58,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96699665] [2022-11-18 20:40:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:58,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:40:58,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:40:58,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:40:58,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:40:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:40:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:59,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:40:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:40:59,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:40:59,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:40:59,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96699665] [2022-11-18 20:40:59,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96699665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:40:59,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:40:59,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-18 20:40:59,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290749983] [2022-11-18 20:40:59,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:59,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:40:59,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:40:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:40:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:40:59,507 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) [2022-11-18 20:41:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:01,104 INFO L93 Difference]: Finished difference Result 244 states and 296 transitions. [2022-11-18 20:41:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:41:01,105 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 [2022-11-18 20:41:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:01,107 INFO L225 Difference]: With dead ends: 244 [2022-11-18 20:41:01,107 INFO L226 Difference]: Without dead ends: 244 [2022-11-18 20:41:01,107 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 [2022-11-18 20:41:01,108 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 162 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:01,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 621 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1030 Invalid, 0 Unknown, 59 Unchecked, 1.5s Time] [2022-11-18 20:41:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-18 20:41:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 236. [2022-11-18 20:41:01,118 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) [2022-11-18 20:41:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 291 transitions. [2022-11-18 20:41:01,120 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 291 transitions. Word has length 25 [2022-11-18 20:41:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:01,121 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 291 transitions. [2022-11-18 20:41:01,121 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) [2022-11-18 20:41:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 291 transitions. [2022-11-18 20:41:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:41:01,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:01,122 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] [2022-11-18 20:41:01,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:01,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:01,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:41:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050226, now seen corresponding path program 1 times [2022-11-18 20:41:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:01,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403185860] [2022-11-18 20:41:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:01,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:01,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:01,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:01,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:41:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:01,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:41:01,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:41:02,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403185860] [2022-11-18 20:41:02,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403185860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:02,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:02,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 20:41:02,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754637976] [2022-11-18 20:41:02,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:41:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:41:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:41:02,862 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) [2022-11-18 20:41:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:08,202 INFO L93 Difference]: Finished difference Result 261 states and 327 transitions. [2022-11-18 20:41:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:41:08,203 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 [2022-11-18 20:41:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:08,205 INFO L225 Difference]: With dead ends: 261 [2022-11-18 20:41:08,205 INFO L226 Difference]: Without dead ends: 261 [2022-11-18 20:41:08,205 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 [2022-11-18 20:41:08,206 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 161 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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 [2022-11-18 20:41:08,206 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] [2022-11-18 20:41:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-18 20:41:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2022-11-18 20:41:08,216 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) [2022-11-18 20:41:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 312 transitions. [2022-11-18 20:41:08,218 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 312 transitions. Word has length 25 [2022-11-18 20:41:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:08,219 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 312 transitions. [2022-11-18 20:41:08,219 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) [2022-11-18 20:41:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 312 transitions. [2022-11-18 20:41:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:41:08,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:08,220 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] [2022-11-18 20:41:08,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:08,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:08,432 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)] === [2022-11-18 20:41:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:08,433 INFO L85 PathProgramCache]: Analyzing trace with hash 369889479, now seen corresponding path program 1 times [2022-11-18 20:41:08,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:08,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060734316] [2022-11-18 20:41:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:08,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:08,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:08,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:41:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:08,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:41:08,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:08,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060734316] [2022-11-18 20:41:08,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060734316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:08,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:08,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:41:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971391317] [2022-11-18 20:41:08,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:41:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:41:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:41:08,557 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) [2022-11-18 20:41:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:08,586 INFO L93 Difference]: Finished difference Result 242 states and 293 transitions. [2022-11-18 20:41:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:41:08,587 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 [2022-11-18 20:41:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:08,588 INFO L225 Difference]: With dead ends: 242 [2022-11-18 20:41:08,589 INFO L226 Difference]: Without dead ends: 226 [2022-11-18 20:41:08,589 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 [2022-11-18 20:41:08,590 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 [2022-11-18 20:41:08,590 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] [2022-11-18 20:41:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-18 20:41:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-11-18 20:41:08,598 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) [2022-11-18 20:41:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 277 transitions. [2022-11-18 20:41:08,601 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 277 transitions. Word has length 30 [2022-11-18 20:41:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:08,601 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 277 transitions. [2022-11-18 20:41:08,601 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) [2022-11-18 20:41:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 277 transitions. [2022-11-18 20:41:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:41:08,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:08,603 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] [2022-11-18 20:41:08,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:08,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:08,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:41:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash -648076771, now seen corresponding path program 1 times [2022-11-18 20:41:08,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673905901] [2022-11-18 20:41:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:08,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:08,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:41:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:41:08,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:41:08,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673905901] [2022-11-18 20:41:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673905901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:41:08,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:41:08,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:41:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986549113] [2022-11-18 20:41:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:41:08,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:41:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:41:08,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:41:08,997 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) [2022-11-18 20:41:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:09,349 INFO L93 Difference]: Finished difference Result 232 states and 286 transitions. [2022-11-18 20:41:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:41:09,349 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 [2022-11-18 20:41:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:09,351 INFO L225 Difference]: With dead ends: 232 [2022-11-18 20:41:09,351 INFO L226 Difference]: Without dead ends: 228 [2022-11-18 20:41:09,351 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 [2022-11-18 20:41:09,351 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 109 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-18 20:41:09,352 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] [2022-11-18 20:41:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-18 20:41:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2022-11-18 20:41:09,360 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) [2022-11-18 20:41:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2022-11-18 20:41:09,362 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 31 [2022-11-18 20:41:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:09,362 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2022-11-18 20:41:09,362 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) [2022-11-18 20:41:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2022-11-18 20:41:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:41:09,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:09,364 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] [2022-11-18 20:41:09,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-18 20:41:09,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:09,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:41:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2088825952, now seen corresponding path program 1 times [2022-11-18 20:41:09,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:09,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029491472] [2022-11-18 20:41:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:09,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:09,578 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:09,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:41:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:09,785 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 [2022-11-18 20:41:09,792 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 [2022-11-18 20:41:09,881 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 [2022-11-18 20:41:09,889 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 [2022-11-18 20:41:10,121 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 [2022-11-18 20:41:10,127 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 [2022-11-18 20:41:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:41:10,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:41:11,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:11,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029491472] [2022-11-18 20:41:11,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029491472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:11,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:11,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2022-11-18 20:41:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238044172] [2022-11-18 20:41:11,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:11,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:41:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:41:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:41:11,724 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) [2022-11-18 20:41:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:13,266 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2022-11-18 20:41:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:41:13,267 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 [2022-11-18 20:41:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:13,268 INFO L225 Difference]: With dead ends: 248 [2022-11-18 20:41:13,268 INFO L226 Difference]: Without dead ends: 248 [2022-11-18 20:41:13,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:41:13,270 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 90 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:13,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2535 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 467 Invalid, 0 Unknown, 106 Unchecked, 1.1s Time] [2022-11-18 20:41:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-18 20:41:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 236. [2022-11-18 20:41:13,279 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) [2022-11-18 20:41:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 284 transitions. [2022-11-18 20:41:13,281 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 284 transitions. Word has length 31 [2022-11-18 20:41:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:13,282 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 284 transitions. [2022-11-18 20:41:13,282 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) [2022-11-18 20:41:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 284 transitions. [2022-11-18 20:41:13,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 20:41:13,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:13,284 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:13,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:13,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:13,497 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)] === [2022-11-18 20:41:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1361134830, now seen corresponding path program 1 times [2022-11-18 20:41:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:13,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543075797] [2022-11-18 20:41:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:13,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:13,501 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:13,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:13,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:41:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:13,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:13,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:14,007 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 [2022-11-18 20:41:14,049 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 [2022-11-18 20:41:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:41:14,122 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 [2022-11-18 20:41:14,137 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:41:14,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 20:41:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 13 not checked. [2022-11-18 20:41:14,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:16,322 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.base_42 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_42) (_ bv0 1))) (forall ((v_ArrVal_533 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_42 v_ArrVal_533) c_nondet_tree_~n~0.base))))) (or (forall ((v_nondet_tree_~n~0.base_42 (_ BitVec 32))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_42) (_ bv0 1)))) (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0)))) is different from false [2022-11-18 20:41:16,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543075797] [2022-11-18 20:41:16,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543075797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518676176] [2022-11-18 20:41:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:41:16,327 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:41:16,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-18 20:41:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:41:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:16,791 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 [2022-11-18 20:41:16,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:16,887 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 [2022-11-18 20:41:16,923 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 [2022-11-18 20:41:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:41:16,988 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 [2022-11-18 20:41:17,002 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:41:17,003 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 [2022-11-18 20:41:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 13 not checked. [2022-11-18 20:41:17,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:23,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518676176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:23,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:23,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:41:23,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306754641] [2022-11-18 20:41:23,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:23,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:41:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:41:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=42, Unknown=6, NotChecked=80, Total=156 [2022-11-18 20:41:23,218 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) [2022-11-18 20:41:23,323 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 [2022-11-18 20:41:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:24,204 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2022-11-18 20:41:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:41:24,205 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 [2022-11-18 20:41:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:24,207 INFO L225 Difference]: With dead ends: 241 [2022-11-18 20:41:24,207 INFO L226 Difference]: Without dead ends: 241 [2022-11-18 20:41:24,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=36, Invalid=53, Unknown=7, NotChecked=114, Total=210 [2022-11-18 20:41:24,208 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 177 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:24,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 420 Invalid, 0 Unknown, 794 Unchecked, 0.9s Time] [2022-11-18 20:41:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-18 20:41:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2022-11-18 20:41:24,216 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) [2022-11-18 20:41:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 286 transitions. [2022-11-18 20:41:24,218 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 286 transitions. Word has length 51 [2022-11-18 20:41:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:24,218 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 286 transitions. [2022-11-18 20:41:24,218 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) [2022-11-18 20:41:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 286 transitions. [2022-11-18 20:41:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:41:24,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:24,220 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:24,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:24,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:24,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:24,638 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)] === [2022-11-18 20:41:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash -931523585, now seen corresponding path program 1 times [2022-11-18 20:41:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:24,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376827587] [2022-11-18 20:41:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:24,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:24,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:24,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:41:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:24,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:24,981 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 [2022-11-18 20:41:25,023 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 [2022-11-18 20:41:25,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:41:25,105 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 [2022-11-18 20:41:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-18 20:41:25,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:25,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376827587] [2022-11-18 20:41:25,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376827587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:25,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1704770931] [2022-11-18 20:41:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:41:25,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:41:25,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-18 20:41:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:41:25,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:25,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:41:25,727 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 [2022-11-18 20:41:25,783 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:41:25,784 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 [2022-11-18 20:41:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 13 not checked. [2022-11-18 20:41:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:25,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1704770931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:25,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:25,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-18 20:41:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101742873] [2022-11-18 20:41:25,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:41:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:25,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:41:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-18 20:41:25,912 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) [2022-11-18 20:41:27,973 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 [2022-11-18 20:41:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:28,504 INFO L93 Difference]: Finished difference Result 237 states and 285 transitions. [2022-11-18 20:41:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:41:28,505 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 [2022-11-18 20:41:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:28,507 INFO L225 Difference]: With dead ends: 237 [2022-11-18 20:41:28,507 INFO L226 Difference]: Without dead ends: 237 [2022-11-18 20:41:28,507 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 [2022-11-18 20:41:28,508 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 89 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 595 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:28,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 212 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 595 Unchecked, 0.5s Time] [2022-11-18 20:41:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-18 20:41:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-11-18 20:41:28,516 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) [2022-11-18 20:41:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 284 transitions. [2022-11-18 20:41:28,518 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 284 transitions. Word has length 45 [2022-11-18 20:41:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:28,518 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 284 transitions. [2022-11-18 20:41:28,519 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) [2022-11-18 20:41:28,519 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 284 transitions. [2022-11-18 20:41:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:41:28,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:28,520 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:41:28,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Ended with exit code 0 [2022-11-18 20:41:28,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:28,934 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)] === [2022-11-18 20:41:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1901629290, now seen corresponding path program 2 times [2022-11-18 20:41:28,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:28,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272800343] [2022-11-18 20:41:28,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:28,935 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 [2022-11-18 20:41:28,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:28,936 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:28,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:29,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:41:29,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:29,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:41:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:29,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:29,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_929 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_929))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:41:29,297 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 [2022-11-18 20:41:29,462 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:41:29,463 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 [2022-11-18 20:41:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 23 not checked. [2022-11-18 20:41:29,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:30,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272800343] [2022-11-18 20:41:30,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272800343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760696840] [2022-11-18 20:41:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:30,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:41:30,380 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:41:30,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-18 20:41:30,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:41:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893467692] [2022-11-18 20:41:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:30,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:30,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:30,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:30,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 1 [2022-11-18 20:41:30,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:41:31,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:41:31,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:41:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:31,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:41:31,102 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1132 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1132) |c_#valid|)) is different from true [2022-11-18 20:41:31,119 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1133 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1133) |c_#valid|)) is different from true [2022-11-18 20:41:37,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1132 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1132) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) (and (= .cse0 |c_#valid|) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)))))) is different from true [2022-11-18 20:41:37,523 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-18 20:41:37,523 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 [2022-11-18 20:41:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 8 refuted. 1 times theorem prover too weak. 19 trivial. 21 not checked. [2022-11-18 20:41:37,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:37,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893467692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:37,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:37,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2022-11-18 20:41:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606525536] [2022-11-18 20:41:37,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:37,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:41:37,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:41:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=52, Unknown=8, NotChecked=90, Total=182 [2022-11-18 20:41:37,799 INFO L87 Difference]: Start difference. First operand 236 states and 284 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-18 20:41:45,920 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1133 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1133) |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 [2022-11-18 20:41:49,971 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))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_1133 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1133))))) (exists ((v_ArrVal_1132 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1132) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) (and (= .cse0 |c_#valid|) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))))))) is different from true [2022-11-18 20:41:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:54,511 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2022-11-18 20:41:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:41:54,511 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), 9 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 49 [2022-11-18 20:41:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:54,513 INFO L225 Difference]: With dead ends: 242 [2022-11-18 20:41:54,513 INFO L226 Difference]: Without dead ends: 242 [2022-11-18 20:41:54,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=50, Invalid=76, Unknown=12, NotChecked=168, Total=306 [2022-11-18 20:41:54,514 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 92 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1434 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:54,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 383 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 236 Invalid, 0 Unknown, 1434 Unchecked, 0.4s Time] [2022-11-18 20:41:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-18 20:41:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-11-18 20:41:54,522 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) [2022-11-18 20:41:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 296 transitions. [2022-11-18 20:41:54,524 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 296 transitions. Word has length 49 [2022-11-18 20:41:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 296 transitions. [2022-11-18 20:41:54,524 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), 9 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-18 20:41:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 296 transitions. [2022-11-18 20:41:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:41:54,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:54,525 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-18 20:41:54,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:54,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:54,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:54,933 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)] === [2022-11-18 20:41:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1403739743, now seen corresponding path program 2 times [2022-11-18 20:41:54,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:41:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952598218] [2022-11-18 20:41:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:41:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:41:54,935 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:41:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:41:55,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:41:55,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:41:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:55,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:55,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:55,399 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1270 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1270) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:41:55,431 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 [2022-11-18 20:41:55,490 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32)) (v_ArrVal_1270 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_77)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_77 v_ArrVal_1270) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-18 20:41:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:41:55,620 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:41:55,620 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 [2022-11-18 20:41:55,637 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:41:55,638 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 [2022-11-18 20:41:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 30 not checked. [2022-11-18 20:41:55,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:58,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:41:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952598218] [2022-11-18 20:41:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952598218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870633361] [2022-11-18 20:41:58,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:41:58,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:41:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:41:58,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:41:58,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-18 20:41:58,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:41:58,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:58,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:41:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:58,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:41:58,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:41:58,650 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_1405 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1405) |c_#length|)))) is different from true [2022-11-18 20:41:58,736 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1405 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1405) v_nondet_tree_~n~0.base_88 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:41:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:41:58,860 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:41:58,860 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 [2022-11-18 20:41:58,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:41:58,878 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 [2022-11-18 20:41:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 30 not checked. [2022-11-18 20:41:58,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:59,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1870633361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:59,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:41:59,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-18 20:41:59,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669802871] [2022-11-18 20:41:59,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:59,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:41:59,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:41:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:41:59,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=42, Unknown=6, NotChecked=80, Total=156 [2022-11-18 20:41:59,320 INFO L87 Difference]: Start difference. First operand 241 states and 296 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:42:00,006 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1405 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1405) v_nondet_tree_~n~0.base_88 (_ bv12 32)) |c_#length|) (= (_ 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_77 (_ BitVec 32)) (v_ArrVal_1270 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_77)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_77 v_ArrVal_1270) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-18 20:42:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:00,314 INFO L93 Difference]: Finished difference Result 254 states and 315 transitions. [2022-11-18 20:42:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:42:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 63 [2022-11-18 20:42:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:00,317 INFO L225 Difference]: With dead ends: 254 [2022-11-18 20:42:00,317 INFO L226 Difference]: Without dead ends: 254 [2022-11-18 20:42:00,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=43, Invalid=62, Unknown=9, NotChecked=126, Total=240 [2022-11-18 20:42:00,318 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 96 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1022 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:00,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 243 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 444 Invalid, 0 Unknown, 1022 Unchecked, 0.8s Time] [2022-11-18 20:42:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-18 20:42:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-18 20:42:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 150 states have (on average 1.4666666666666666) internal successors, (220), 201 states have internal predecessors, (220), 33 states have call successors, (33), 14 states have call predecessors, (33), 20 states have return successors, (62), 38 states have call predecessors, (62), 33 states have call successors, (62) [2022-11-18 20:42:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 315 transitions. [2022-11-18 20:42:00,328 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 315 transitions. Word has length 63 [2022-11-18 20:42:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:00,329 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 315 transitions. [2022-11-18 20:42:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:42:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 315 transitions. [2022-11-18 20:42:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:42:00,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:00,330 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] [2022-11-18 20:42:00,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-18 20:42:00,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:00,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:42:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2047148606, now seen corresponding path program 2 times [2022-11-18 20:42:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:00,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178685185] [2022-11-18 20:42:00,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:42:00,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:00,752 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:00,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:00,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:42:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:00,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:42:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:42:01,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:02,040 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 [2022-11-18 20:42:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:42:02,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178685185] [2022-11-18 20:42:02,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178685185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:02,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:02,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-18 20:42:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614795166] [2022-11-18 20:42:02,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:02,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:42:02,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:42:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:42:02,221 INFO L87 Difference]: Start difference. First operand 254 states and 315 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) [2022-11-18 20:42:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:05,181 INFO L93 Difference]: Finished difference Result 258 states and 319 transitions. [2022-11-18 20:42:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:42:05,182 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 [2022-11-18 20:42:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:05,183 INFO L225 Difference]: With dead ends: 258 [2022-11-18 20:42:05,183 INFO L226 Difference]: Without dead ends: 258 [2022-11-18 20:42:05,184 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 [2022-11-18 20:42:05,184 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 71 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:05,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1655 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 746 Invalid, 0 Unknown, 163 Unchecked, 2.7s Time] [2022-11-18 20:42:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-18 20:42:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2022-11-18 20:42:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 150 states have (on average 1.4533333333333334) internal successors, (218), 201 states have internal predecessors, (218), 33 states have call successors, (33), 14 states have call predecessors, (33), 20 states have return successors, (62), 38 states have call predecessors, (62), 33 states have call successors, (62) [2022-11-18 20:42:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 313 transitions. [2022-11-18 20:42:05,195 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 313 transitions. Word has length 39 [2022-11-18 20:42:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:05,196 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 313 transitions. [2022-11-18 20:42:05,196 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) [2022-11-18 20:42:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 313 transitions. [2022-11-18 20:42:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:42:05,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:05,198 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:42:05,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:05,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:05,410 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)] === [2022-11-18 20:42:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:05,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1831948676, now seen corresponding path program 3 times [2022-11-18 20:42:05,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:05,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730735023] [2022-11-18 20:42:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:05,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:05,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:05,412 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:05,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:05,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:42:05,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:05,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:42:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:05,922 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1562 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1562) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:42:05,951 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1562 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1562) |c_#valid|))) is different from true [2022-11-18 20:42:05,976 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1563 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1563))) is different from true [2022-11-18 20:42:06,011 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 [2022-11-18 20:42:08,124 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:42:08,125 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 [2022-11-18 20:42:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 22 not checked. [2022-11-18 20:42:08,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:08,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730735023] [2022-11-18 20:42:08,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730735023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:08,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [203104077] [2022-11-18 20:42:08,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:08,446 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:42:08,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:42:08,451 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:42:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-18 20:42:08,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:42:08,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:08,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:42:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:09,000 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1668 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1668) |c_#valid|)) is different from true [2022-11-18 20:42:09,024 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1669 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1669))) is different from true [2022-11-18 20:42:09,091 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_123 (_ BitVec 32)) (v_ArrVal_1668 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1668) v_nondet_tree_~n~0.base_123 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:42:11,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:42:11,196 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-18 20:42:11,196 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 [2022-11-18 20:42:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 20 not checked. [2022-11-18 20:42:11,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [203104077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:11,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:11,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-18 20:42:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398234124] [2022-11-18 20:42:11,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:42:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:42:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=61, Unknown=9, NotChecked=154, Total=272 [2022-11-18 20:42:11,515 INFO L87 Difference]: Start difference. First operand 254 states and 313 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) [2022-11-18 20:42:21,720 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1562 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1562) |c_#valid|))) (exists ((v_ArrVal_1668 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1668) |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 [2022-11-18 20:42:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:24,306 INFO L93 Difference]: Finished difference Result 263 states and 337 transitions. [2022-11-18 20:42:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:42:24,307 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 [2022-11-18 20:42:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:24,308 INFO L225 Difference]: With dead ends: 263 [2022-11-18 20:42:24,308 INFO L226 Difference]: Without dead ends: 263 [2022-11-18 20:42:24,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=78, Invalid=98, Unknown=12, NotChecked=232, Total=420 [2022-11-18 20:42:24,309 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 94 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1694 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 314 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 1694 Unchecked, 0.5s Time] [2022-11-18 20:42:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-18 20:42:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 258. [2022-11-18 20:42:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 153 states have (on average 1.4509803921568627) internal successors, (222), 204 states have internal predecessors, (222), 33 states have call successors, (33), 14 states have call predecessors, (33), 21 states have return successors, (71), 39 states have call predecessors, (71), 33 states have call successors, (71) [2022-11-18 20:42:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 326 transitions. [2022-11-18 20:42:24,320 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 326 transitions. Word has length 43 [2022-11-18 20:42:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:24,320 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 326 transitions. [2022-11-18 20:42:24,320 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) [2022-11-18 20:42:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 326 transitions. [2022-11-18 20:42:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:42:24,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:24,322 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:42:24,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:24,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:24,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:42:24,735 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)] === [2022-11-18 20:42:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 356253163, now seen corresponding path program 3 times [2022-11-18 20:42:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902450380] [2022-11-18 20:42:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:24,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:24,738 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:24,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:25,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:42:25,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:25,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:42:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:25,260 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 [2022-11-18 20:42:25,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:42:25,402 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 [2022-11-18 20:42:25,509 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1775 (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_1775) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:42:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:25,567 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:42:25,567 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 [2022-11-18 20:42:25,580 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:42:25,580 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 [2022-11-18 20:42:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 26 not checked. [2022-11-18 20:42:25,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:27,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:27,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902450380] [2022-11-18 20:42:27,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902450380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:27,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1240908581] [2022-11-18 20:42:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:27,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:42:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:42:27,972 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:42:27,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-18 20:42:28,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:42:28,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:42:28,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:28,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:28,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:42:28,699 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1881 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1881) |c_#length|))) is different from true [2022-11-18 20:42:28,874 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1775 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1881 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1881) |c_nondet_tree_#t~ret9.base| v_ArrVal_1775) |c_#length|))) is different from true [2022-11-18 20:42:28,891 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1775 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1881 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1881) |nondet_tree_#t~ret9.base| v_ArrVal_1775) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:42:28,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:28,931 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 [2022-11-18 20:42:28,961 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:42:28,962 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 [2022-11-18 20:42:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 14 not checked. [2022-11-18 20:42:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1240908581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:31,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-11-18 20:42:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989159959] [2022-11-18 20:42:31,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:42:31,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:42:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=129, Unknown=7, NotChecked=130, Total=306 [2022-11-18 20:42:31,772 INFO L87 Difference]: Start difference. First operand 258 states and 326 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-18 20:42:44,059 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1775 (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_1775) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_1775 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1881 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1881) |nondet_tree_#t~ret9.base| v_ArrVal_1775) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:42:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:44,928 INFO L93 Difference]: Finished difference Result 264 states and 345 transitions. [2022-11-18 20:42:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:42:44,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 49 [2022-11-18 20:42:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:44,936 INFO L225 Difference]: With dead ends: 264 [2022-11-18 20:42:44,936 INFO L226 Difference]: Without dead ends: 264 [2022-11-18 20:42:44,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=74, Invalid=280, Unknown=12, NotChecked=234, Total=600 [2022-11-18 20:42:44,937 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 100 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1662 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:44,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 405 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 476 Invalid, 0 Unknown, 1662 Unchecked, 1.0s Time] [2022-11-18 20:42:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-18 20:42:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2022-11-18 20:42:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 155 states have (on average 1.4387096774193548) internal successors, (223), 206 states have internal predecessors, (223), 34 states have call successors, (34), 14 states have call predecessors, (34), 21 states have return successors, (76), 40 states have call predecessors, (76), 34 states have call successors, (76) [2022-11-18 20:42:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 333 transitions. [2022-11-18 20:42:44,948 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 333 transitions. Word has length 49 [2022-11-18 20:42:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:44,948 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 333 transitions. [2022-11-18 20:42:44,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 6 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-18 20:42:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 333 transitions. [2022-11-18 20:42:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:42:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:44,950 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] [2022-11-18 20:42:44,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:45,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:45,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:45,359 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:42:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1322566655, now seen corresponding path program 1 times [2022-11-18 20:42:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798813142] [2022-11-18 20:42:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:45,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:45,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:45,361 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:45,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:42:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:45,598 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 [2022-11-18 20:42:45,605 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 [2022-11-18 20:42:46,004 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 [2022-11-18 20:42:46,009 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 [2022-11-18 20:42:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:42:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:42:46,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:46,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798813142] [2022-11-18 20:42:46,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798813142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:46,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:46,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-11-18 20:42:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805579353] [2022-11-18 20:42:46,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:42:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:42:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:42:46,523 INFO L87 Difference]: Start difference. First operand 261 states and 333 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) [2022-11-18 20:42:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:47,657 INFO L93 Difference]: Finished difference Result 307 states and 399 transitions. [2022-11-18 20:42:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:42:47,658 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 [2022-11-18 20:42:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:47,660 INFO L225 Difference]: With dead ends: 307 [2022-11-18 20:42:47,660 INFO L226 Difference]: Without dead ends: 307 [2022-11-18 20:42:47,660 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 [2022-11-18 20:42:47,661 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 43 mSDsluCounter, 2082 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:47,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 2275 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 329 Invalid, 0 Unknown, 46 Unchecked, 0.9s Time] [2022-11-18 20:42:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-18 20:42:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 294. [2022-11-18 20:42:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 179 states have (on average 1.4189944134078212) internal successors, (254), 233 states have internal predecessors, (254), 38 states have call successors, (38), 17 states have call predecessors, (38), 26 states have return successors, (96), 43 states have call predecessors, (96), 38 states have call successors, (96) [2022-11-18 20:42:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 388 transitions. [2022-11-18 20:42:47,673 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 388 transitions. Word has length 38 [2022-11-18 20:42:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:47,673 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 388 transitions. [2022-11-18 20:42:47,674 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) [2022-11-18 20:42:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 388 transitions. [2022-11-18 20:42:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:42:47,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:47,675 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:42:47,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:47,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:47,887 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)] === [2022-11-18 20:42:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 484072692, now seen corresponding path program 2 times [2022-11-18 20:42:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:47,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601140814] [2022-11-18 20:42:47,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:42:47,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:47,889 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:47,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:48,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:42:48,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:42:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:48,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:48,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:48,551 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2056 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2056) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:42:48,589 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 [2022-11-18 20:42:48,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_158 (_ BitVec 32)) (v_ArrVal_2056 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_158) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_158 v_ArrVal_2056) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-18 20:42:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:48,777 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:42:48,778 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 [2022-11-18 20:42:48,794 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:42:48,794 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 [2022-11-18 20:42:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-18 20:42:48,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:49,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:42:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601140814] [2022-11-18 20:42:49,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601140814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [464100311] [2022-11-18 20:42:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:42:49,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:42:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:42:49,581 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:42:49,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-18 20:42:50,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:42:50,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:42:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:50,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:50,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:50,228 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2185 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2185))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:42:50,306 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_169 (_ BitVec 32)) (v_ArrVal_2185 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_169) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_169 v_ArrVal_2185) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:42:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:50,420 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:42:50,421 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 [2022-11-18 20:42:50,439 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:42:50,439 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 [2022-11-18 20:42:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-18 20:42:50,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:56,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [464100311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:56,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:56,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-18 20:42:56,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988186389] [2022-11-18 20:42:56,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:42:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:42:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:42:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=82, Unknown=7, NotChecked=110, Total=240 [2022-11-18 20:42:56,525 INFO L87 Difference]: Start difference. First operand 294 states and 388 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 20:42:57,043 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_169 (_ BitVec 32)) (v_ArrVal_2185 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_169) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_169 v_ArrVal_2185) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_158 (_ BitVec 32)) (v_ArrVal_2056 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_158) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_158 v_ArrVal_2056) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-18 20:42:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:57,294 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2022-11-18 20:42:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:42:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) Word has length 59 [2022-11-18 20:42:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:57,297 INFO L225 Difference]: With dead ends: 313 [2022-11-18 20:42:57,297 INFO L226 Difference]: Without dead ends: 313 [2022-11-18 20:42:57,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=60, Invalid=110, Unknown=10, NotChecked=162, Total=342 [2022-11-18 20:42:57,298 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 177 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1023 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:57,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 185 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 1023 Unchecked, 0.6s Time] [2022-11-18 20:42:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-18 20:42:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2022-11-18 20:42:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 189 states have (on average 1.402116402116402) internal successors, (265), 246 states have internal predecessors, (265), 41 states have call successors, (41), 18 states have call predecessors, (41), 28 states have return successors, (114), 44 states have call predecessors, (114), 41 states have call successors, (114) [2022-11-18 20:42:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 420 transitions. [2022-11-18 20:42:57,319 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 420 transitions. Word has length 59 [2022-11-18 20:42:57,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:57,320 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 420 transitions. [2022-11-18 20:42:57,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 20:42:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 420 transitions. [2022-11-18 20:42:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:42:57,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:57,321 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:42:57,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:42:57,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:57,727 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:42:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 357426734, now seen corresponding path program 3 times [2022-11-18 20:42:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:42:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558361052] [2022-11-18 20:42:57,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:42:57,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:42:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:42:57,730 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:42:57,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:42:58,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:42:58,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:42:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:58,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:42:58,415 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 [2022-11-18 20:42:58,495 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:42:58,495 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 [2022-11-18 20:42:58,574 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2291 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2291))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:42:58,610 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2291 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2291)))) is different from true [2022-11-18 20:42:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:42:58,681 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 [2022-11-18 20:42:58,696 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:42:58,697 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 [2022-11-18 20:42:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 40 not checked. [2022-11-18 20:42:58,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:00,892 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.base_184 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_184))) (forall ((v_ArrVal_2294 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| v_nondet_tree_~n~0.base_184 v_ArrVal_2294) c_nondet_tree_~n~0.base))))) (or (forall ((v_nondet_tree_~n~0.base_184 (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| v_nondet_tree_~n~0.base_184)))) (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0)))) is different from false [2022-11-18 20:43:00,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:00,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558361052] [2022-11-18 20:43:00,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558361052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:00,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1112355302] [2022-11-18 20:43:00,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:00,900 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-18 20:43:01,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:01,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99908827] [2022-11-18 20:43:01,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:01,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:01,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:01,561 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:43:01,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 1 [2022-11-18 20:43:07,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:43:07,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:43:07,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:07,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:43:07,321 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2492 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2492) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:07,365 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2492 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2492) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:07,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:07,464 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 [2022-11-18 20:43:07,477 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:07,478 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 [2022-11-18 20:43:07,531 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2493 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2493) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:07,573 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2493 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2493) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:07,654 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 [2022-11-18 20:43:07,673 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:07,674 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 [2022-11-18 20:43:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 40 not checked. [2022-11-18 20:43:07,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:08,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99908827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:08,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:08,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-18 20:43:08,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836699413] [2022-11-18 20:43:08,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:43:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:43:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=46, Unknown=8, NotChecked=152, Total=240 [2022-11-18 20:43:08,002 INFO L87 Difference]: Start difference. First operand 309 states and 420 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-18 20:43:08,151 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_2493 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2493) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2291 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2291)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2492 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2492) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:09,095 INFO L93 Difference]: Finished difference Result 321 states and 443 transitions. [2022-11-18 20:43:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:43:09,096 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), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-11-18 20:43:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:09,098 INFO L225 Difference]: With dead ends: 321 [2022-11-18 20:43:09,098 INFO L226 Difference]: Without dead ends: 321 [2022-11-18 20:43:09,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=49, Invalid=67, Unknown=10, NotChecked=216, Total=342 [2022-11-18 20:43:09,099 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 176 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1409 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:09,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 181 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 272 Invalid, 0 Unknown, 1409 Unchecked, 0.9s Time] [2022-11-18 20:43:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-18 20:43:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2022-11-18 20:43:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 197 states have (on average 1.3908629441624365) internal successors, (274), 254 states have internal predecessors, (274), 43 states have call successors, (43), 18 states have call predecessors, (43), 29 states have return successors, (126), 47 states have call predecessors, (126), 43 states have call successors, (126) [2022-11-18 20:43:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 443 transitions. [2022-11-18 20:43:09,115 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 443 transitions. Word has length 49 [2022-11-18 20:43:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:09,115 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 443 transitions. [2022-11-18 20:43:09,115 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), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-18 20:43:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 443 transitions. [2022-11-18 20:43:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:43:09,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:09,117 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:43:09,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:09,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:09,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:43:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1201919117, now seen corresponding path program 2 times [2022-11-18 20:43:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:09,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611000937] [2022-11-18 20:43:09,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:09,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:09,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:09,535 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:09,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:09,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:43:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:43:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:09,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:43:10,061 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2619 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2619))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:10,107 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2619 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2619)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:10,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:43:10,201 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 [2022-11-18 20:43:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 67 proven. 4 refuted. 0 times theorem prover too weak. 57 trivial. 11 not checked. [2022-11-18 20:43:10,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:10,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:10,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611000937] [2022-11-18 20:43:10,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611000937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:10,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1428442948] [2022-11-18 20:43:10,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:10,417 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:10,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:10,427 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:10,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-18 20:43:11,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:11,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473608118] [2022-11-18 20:43:11,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:11,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:11,019 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:11,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 20:43:11,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 1 [2022-11-18 20:43:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:43:11,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:43:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:11,380 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2865 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2865))) is different from true [2022-11-18 20:43:11,462 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 [2022-11-18 20:43:11,497 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:43:11,497 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 [2022-11-18 20:43:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 5 not checked. [2022-11-18 20:43:11,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:11,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473608118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:11,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:11,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-11-18 20:43:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950191244] [2022-11-18 20:43:11,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:43:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:43:11,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=4, NotChecked=44, Total=90 [2022-11-18 20:43:11,692 INFO L87 Difference]: Start difference. First operand 320 states and 443 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-18 20:43:13,745 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2865 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2865))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2619 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2619))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:13,749 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2619 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2619)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2865 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2865)))) is different from true [2022-11-18 20:43:15,797 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2619 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2619)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (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 [2022-11-18 20:43:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:16,506 INFO L93 Difference]: Finished difference Result 325 states and 461 transitions. [2022-11-18 20:43:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:43:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2022-11-18 20:43:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:16,510 INFO L225 Difference]: With dead ends: 325 [2022-11-18 20:43:16,510 INFO L226 Difference]: Without dead ends: 325 [2022-11-18 20:43:16,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=36, Invalid=41, Unknown=7, NotChecked=126, Total=210 [2022-11-18 20:43:16,511 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 90 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 932 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:16,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 260 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 244 Invalid, 0 Unknown, 932 Unchecked, 0.7s Time] [2022-11-18 20:43:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-18 20:43:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2022-11-18 20:43:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 198 states have (on average 1.3888888888888888) internal successors, (275), 254 states have internal predecessors, (275), 43 states have call successors, (43), 18 states have call predecessors, (43), 29 states have return successors, (126), 48 states have call predecessors, (126), 43 states have call successors, (126) [2022-11-18 20:43:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 444 transitions. [2022-11-18 20:43:16,528 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 444 transitions. Word has length 59 [2022-11-18 20:43:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:16,528 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 444 transitions. [2022-11-18 20:43:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-18 20:43:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 444 transitions. [2022-11-18 20:43:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:43:16,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:16,530 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:43:16,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:16,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:16,941 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)] === [2022-11-18 20:43:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 812521518, now seen corresponding path program 4 times [2022-11-18 20:43:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:16,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311677398] [2022-11-18 20:43:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:16,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:16,942 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:17,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:17,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:43:17,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:17,590 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 7 [2022-11-18 20:43:17,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:43:17,663 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_3044 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3044))))) is different from true [2022-11-18 20:43:17,704 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3044 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3044)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:17,767 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 [2022-11-18 20:43:17,779 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:17,779 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 [2022-11-18 20:43:17,845 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3045 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3045))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:17,885 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3045 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3045)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:17,916 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 [2022-11-18 20:43:17,984 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3045 (_ BitVec 32)) (v_nondet_tree_~n~0.base_199 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3045) v_nondet_tree_~n~0.base_199 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:18,074 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:43:18,075 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 [2022-11-18 20:43:18,099 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:18,099 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 [2022-11-18 20:43:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 142 proven. 10 refuted. 0 times theorem prover too weak. 65 trivial. 81 not checked. [2022-11-18 20:43:18,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:20,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311677398] [2022-11-18 20:43:20,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311677398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968412592] [2022-11-18 20:43:20,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:20,547 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:20,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:20,548 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:20,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-18 20:43:21,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:21,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:43:21,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:21,507 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 [2022-11-18 20:43:21,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:43:21,555 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3226 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3226) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:21,597 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3226 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3226) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:21,678 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 [2022-11-18 20:43:21,693 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:21,693 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 [2022-11-18 20:43:21,744 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3227 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3227) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:21,785 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3227 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3227) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:21,879 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_211 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3227 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3227) v_nondet_tree_~n~0.base_211 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:21,965 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:43:21,966 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 [2022-11-18 20:43:21,984 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:43:21,984 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 [2022-11-18 20:43:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 140 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 81 not checked. [2022-11-18 20:43:22,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:22,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968412592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:22,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:22,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-18 20:43:22,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081529776] [2022-11-18 20:43:22,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:43:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:43:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=49, Unknown=11, NotChecked=242, Total=342 [2022-11-18 20:43:22,448 INFO L87 Difference]: Start difference. First operand 321 states and 444 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-18 20:43:22,578 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_3226 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3226) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3227 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3227) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3045 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3045)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3044 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3044)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:22,585 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_3226 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3226) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3044 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3044)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:22,719 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3045 (_ BitVec 32)) (v_nondet_tree_~n~0.base_199 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3045) v_nondet_tree_~n~0.base_199 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_nondet_tree_~n~0.base_211 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3227 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3227) v_nondet_tree_~n~0.base_211 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:23,395 INFO L93 Difference]: Finished difference Result 326 states and 463 transitions. [2022-11-18 20:43:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:43:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) Word has length 83 [2022-11-18 20:43:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:23,399 INFO L225 Difference]: With dead ends: 326 [2022-11-18 20:43:23,400 INFO L226 Difference]: Without dead ends: 326 [2022-11-18 20:43:23,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=52, Invalid=62, Unknown=14, NotChecked=378, Total=506 [2022-11-18 20:43:23,401 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 103 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:23,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 212 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 334 Invalid, 0 Unknown, 2269 Unchecked, 0.8s Time] [2022-11-18 20:43:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-18 20:43:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2022-11-18 20:43:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 199 states have (on average 1.3919597989949748) internal successors, (277), 254 states have internal predecessors, (277), 43 states have call successors, (43), 18 states have call predecessors, (43), 29 states have return successors, (126), 49 states have call predecessors, (126), 43 states have call successors, (126) [2022-11-18 20:43:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 446 transitions. [2022-11-18 20:43:23,427 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 446 transitions. Word has length 83 [2022-11-18 20:43:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:23,427 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 446 transitions. [2022-11-18 20:43:23,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-18 20:43:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 446 transitions. [2022-11-18 20:43:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:43:23,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:23,431 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1] [2022-11-18 20:43:23,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:23,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:23,840 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)] === [2022-11-18 20:43:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1553274119, now seen corresponding path program 3 times [2022-11-18 20:43:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553199382] [2022-11-18 20:43:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:23,842 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:23,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:24,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:43:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:24,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:43:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:24,401 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3452 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3452) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:24,437 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3452 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3452) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:24,463 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3453 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3453) |c_#valid|)) is different from true [2022-11-18 20:43:24,511 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 [2022-11-18 20:43:26,648 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:43:26,649 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 [2022-11-18 20:43:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 216 proven. 7 refuted. 0 times theorem prover too weak. 211 trivial. 21 not checked. [2022-11-18 20:43:26,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:28,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553199382] [2022-11-18 20:43:28,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553199382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367243812] [2022-11-18 20:43:28,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:28,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:28,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:28,043 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:28,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-18 20:43:28,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:43:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:28,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:43:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:28,847 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3683 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3683))) is different from true [2022-11-18 20:43:28,887 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3684 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3684) |c_#valid|)) is different from true [2022-11-18 20:43:29,003 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3683 (_ BitVec 1)) (v_nondet_tree_~n~0.base_236 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3683) v_nondet_tree_~n~0.base_236 (_ bv1 1)))) is different from true [2022-11-18 20:43:31,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:43:31,112 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-18 20:43:31,112 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 [2022-11-18 20:43:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 216 proven. 8 refuted. 0 times theorem prover too weak. 211 trivial. 20 not checked. [2022-11-18 20:43:31,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:31,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367243812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:31,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:31,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-18 20:43:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956164092] [2022-11-18 20:43:31,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:31,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:43:31,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:43:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=61, Unknown=9, NotChecked=154, Total=272 [2022-11-18 20:43:31,449 INFO L87 Difference]: Start difference. First operand 322 states and 446 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-18 20:43:39,567 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_222 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3452 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3452) v_nondet_tree_~n~0.base_222 (_ bv1 1))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3452 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3452) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3683 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3683))) (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_3453 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3453)))))) is different from true [2022-11-18 20:43:39,571 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3683 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3683))) (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_3453 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3453))))) (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_3452 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3452) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:43,061 INFO L93 Difference]: Finished difference Result 324 states and 447 transitions. [2022-11-18 20:43:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:43:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 101 [2022-11-18 20:43:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:43,064 INFO L225 Difference]: With dead ends: 324 [2022-11-18 20:43:43,064 INFO L226 Difference]: Without dead ends: 324 [2022-11-18 20:43:43,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 191 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=78, Invalid=101, Unknown=13, NotChecked=270, Total=462 [2022-11-18 20:43:43,065 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 93 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1553 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 322 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 244 Invalid, 0 Unknown, 1553 Unchecked, 0.6s Time] [2022-11-18 20:43:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-18 20:43:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2022-11-18 20:43:43,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 198 states have (on average 1.3888888888888888) internal successors, (275), 254 states have internal predecessors, (275), 43 states have call successors, (43), 18 states have call predecessors, (43), 29 states have return successors, (126), 48 states have call predecessors, (126), 43 states have call successors, (126) [2022-11-18 20:43:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 444 transitions. [2022-11-18 20:43:43,080 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 444 transitions. Word has length 101 [2022-11-18 20:43:43,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:43,082 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 444 transitions. [2022-11-18 20:43:43,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-18 20:43:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 444 transitions. [2022-11-18 20:43:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:43:43,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:43,084 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:43:43,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:43,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:43,497 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)] === [2022-11-18 20:43:43,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1121861290, now seen corresponding path program 5 times [2022-11-18 20:43:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:43,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743011117] [2022-11-18 20:43:43,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:43:43,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:43,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:43,499 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:43,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:43,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:43:43,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:43:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:44,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:43:44,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:43:44,150 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3776 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3776) |c_#length|)) (exists ((v_ArrVal_3775 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3775))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:44,188 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3777 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3777) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:44,230 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3777 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3777) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:44,302 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_250 (_ BitVec 32)) (v_ArrVal_3775 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3777 (_ BitVec 32)) (v_ArrVal_3776 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3776) v_nondet_tree_~n~0.base_250 v_ArrVal_3777)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3775) v_nondet_tree_~n~0.base_250) (_ bv0 1)))) is different from true [2022-11-18 20:43:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:44,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:44,442 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:43:44,442 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 [2022-11-18 20:43:44,496 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-18 20:43:44,496 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 [2022-11-18 20:43:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 40 not checked. [2022-11-18 20:43:44,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:45,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743011117] [2022-11-18 20:43:45,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743011117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766303486] [2022-11-18 20:43:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:43:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:45,022 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:45,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-18 20:43:45,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835468928] [2022-11-18 20:43:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:43:45,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:45,608 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:45,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-18 20:43:45,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 1 [2022-11-18 20:43:48,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:43:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:43:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:48,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:43:49,114 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3955 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3955) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:49,150 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3955 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3955) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:49,225 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_261 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3955 (_ BitVec 32)) (v_ArrVal_3953 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_261) (_ bv0 1)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_261 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_261 v_ArrVal_3953) nondet_tree_~n~0.base v_ArrVal_3955) |c_#length|))) is different from true [2022-11-18 20:43:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:49,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:43:49,387 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 [2022-11-18 20:43:49,420 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:43:49,420 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 [2022-11-18 20:43:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 37 not checked. [2022-11-18 20:43:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835468928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:51,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:51,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-18 20:43:51,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267289667] [2022-11-18 20:43:51,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:51,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:43:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:43:51,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=8, NotChecked=154, Total=272 [2022-11-18 20:43:51,965 INFO L87 Difference]: Start difference. First operand 321 states and 444 transitions. Second operand has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-18 20:43:52,121 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3777 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3777) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3955 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3955) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:43:52,616 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_261 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3955 (_ BitVec 32)) (v_ArrVal_3953 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_261) (_ bv0 1)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_261 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_261 v_ArrVal_3953) nondet_tree_~n~0.base v_ArrVal_3955) |c_#length|))) (exists ((v_nondet_tree_~n~0.base_250 (_ BitVec 32)) (v_ArrVal_3775 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3777 (_ BitVec 32)) (v_ArrVal_3776 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3776) v_nondet_tree_~n~0.base_250 v_ArrVal_3777)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3775) v_nondet_tree_~n~0.base_250) (_ bv0 1))))) is different from true [2022-11-18 20:43:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:52,968 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2022-11-18 20:43:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:43:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) Word has length 45 [2022-11-18 20:43:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:52,971 INFO L225 Difference]: With dead ends: 344 [2022-11-18 20:43:52,971 INFO L226 Difference]: Without dead ends: 344 [2022-11-18 20:43:52,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=58, Invalid=100, Unknown=10, NotChecked=252, Total=420 [2022-11-18 20:43:52,971 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1617 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:52,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 244 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 318 Invalid, 0 Unknown, 1617 Unchecked, 0.8s Time] [2022-11-18 20:43:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-18 20:43:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-11-18 20:43:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 214 states have (on average 1.3644859813084111) internal successors, (292), 269 states have internal predecessors, (292), 46 states have call successors, (46), 18 states have call predecessors, (46), 32 states have return successors, (144), 55 states have call predecessors, (144), 46 states have call successors, (144) [2022-11-18 20:43:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 482 transitions. [2022-11-18 20:43:52,985 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 482 transitions. Word has length 45 [2022-11-18 20:43:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:52,985 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 482 transitions. [2022-11-18 20:43:52,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 14 states have internal predecessors, (48), 11 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 6 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-18 20:43:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 482 transitions. [2022-11-18 20:43:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:43:52,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:52,987 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:43:53,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:53,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:53,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:53,400 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)] === [2022-11-18 20:43:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:53,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1121861291, now seen corresponding path program 4 times [2022-11-18 20:43:53,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:43:53,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254883704] [2022-11-18 20:43:53,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:53,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:43:53,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:43:53,402 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:43:53,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:43:53,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:43:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:53,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:43:53,850 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4048 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4048) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:43:53,874 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 [2022-11-18 20:43:54,046 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:43:54,047 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 [2022-11-18 20:43:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 28 not checked. [2022-11-18 20:43:54,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:56,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:43:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254883704] [2022-11-18 20:43:56,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254883704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963465318] [2022-11-18 20:43:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:43:56,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:43:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:43:56,215 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:43:56,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-18 20:43:56,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:43:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:43:56,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:56,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:43:56,910 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4136 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4136) |c_#valid|)) is different from true [2022-11-18 20:43:56,966 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_283 (_ BitVec 32)) (v_ArrVal_4136 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4136) v_nondet_tree_~n~0.base_283 (_ bv1 1)))) is different from true [2022-11-18 20:43:59,048 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_283 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4136 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4136) v_nondet_tree_~n~0.base_283 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)))) is different from true [2022-11-18 20:43:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:43:59,124 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-18 20:43:59,124 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 [2022-11-18 20:43:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 38 not checked. [2022-11-18 20:43:59,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963465318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:59,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:59,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2022-11-18 20:43:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739292181] [2022-11-18 20:43:59,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:43:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:43:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:43:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=41, Unknown=7, NotChecked=80, Total=156 [2022-11-18 20:43:59,368 INFO L87 Difference]: Start difference. First operand 343 states and 482 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) [2022-11-18 20:44:12,579 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_283 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4136 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4136) v_nondet_tree_~n~0.base_283 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-18 20:44:16,220 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_272 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4048 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_272)) (= |c_#valid| (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_272 v_ArrVal_4048) nondet_tree_~n~0.base (_ bv1 1))))) (exists ((v_nondet_tree_~n~0.base_283 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4136 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4136) v_nondet_tree_~n~0.base_283 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-18 20:44:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:18,480 INFO L93 Difference]: Finished difference Result 343 states and 481 transitions. [2022-11-18 20:44:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:44:18,481 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 [2022-11-18 20:44:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:18,483 INFO L225 Difference]: With dead ends: 343 [2022-11-18 20:44:18,483 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 20:44:18,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=71, Invalid=95, Unknown=18, NotChecked=196, Total=380 [2022-11-18 20:44:18,484 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 91 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:18,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 320 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 1147 Unchecked, 0.5s Time] [2022-11-18 20:44:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 20:44:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2022-11-18 20:44:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 213 states have (on average 1.3615023474178405) internal successors, (290), 269 states have internal predecessors, (290), 46 states have call successors, (46), 18 states have call predecessors, (46), 32 states have return successors, (144), 54 states have call predecessors, (144), 46 states have call successors, (144) [2022-11-18 20:44:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2022-11-18 20:44:18,498 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 45 [2022-11-18 20:44:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:18,498 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2022-11-18 20:44:18,498 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) [2022-11-18 20:44:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2022-11-18 20:44:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:44:18,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:18,500 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] [2022-11-18 20:44:18,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:18,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:44:18,901 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:44:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522260, now seen corresponding path program 2 times [2022-11-18 20:44:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:44:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601455060] [2022-11-18 20:44:18,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:44:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:44:18,902 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:44:18,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:19,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:44:19,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:44:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:19,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:44:19,346 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 [2022-11-18 20:44:19,417 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 [2022-11-18 20:44:19,629 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 [2022-11-18 20:44:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:44:19,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:44:20,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:44:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601455060] [2022-11-18 20:44:20,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601455060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:20,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:44:20,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2022-11-18 20:44:20,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785916750] [2022-11-18 20:44:20,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:44:20,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:44:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:44:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:44:20,460 INFO L87 Difference]: Start difference. First operand 342 states and 480 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) [2022-11-18 20:44:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:25,494 INFO L93 Difference]: Finished difference Result 371 states and 515 transitions. [2022-11-18 20:44:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:44:25,495 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 [2022-11-18 20:44:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:25,498 INFO L225 Difference]: With dead ends: 371 [2022-11-18 20:44:25,498 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 20:44:25,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:44:25,499 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 155 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:25,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1114 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2385 Invalid, 0 Unknown, 257 Unchecked, 4.4s Time] [2022-11-18 20:44:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 20:44:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 356. [2022-11-18 20:44:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 224 states have (on average 1.3705357142857142) internal successors, (307), 280 states have internal predecessors, (307), 48 states have call successors, (48), 19 states have call predecessors, (48), 33 states have return successors, (147), 56 states have call predecessors, (147), 48 states have call successors, (147) [2022-11-18 20:44:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 502 transitions. [2022-11-18 20:44:25,512 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 502 transitions. Word has length 45 [2022-11-18 20:44:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:25,513 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 502 transitions. [2022-11-18 20:44:25,513 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) [2022-11-18 20:44:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 502 transitions. [2022-11-18 20:44:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:44:25,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:25,514 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] [2022-11-18 20:44:25,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:25,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:25,727 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:44:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522261, now seen corresponding path program 1 times [2022-11-18 20:44:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:44:25,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52799314] [2022-11-18 20:44:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:25,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:44:25,730 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:44:25,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:44:26,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:26,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:44:26,275 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 [2022-11-18 20:44:26,283 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 [2022-11-18 20:44:26,404 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 [2022-11-18 20:44:26,413 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 [2022-11-18 20:44:26,753 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 [2022-11-18 20:44:26,760 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 [2022-11-18 20:44:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:44:26,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:44:33,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:44:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52799314] [2022-11-18 20:44:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52799314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:33,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:44:33,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-18 20:44:33,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019436196] [2022-11-18 20:44:33,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:33,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:44:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:44:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:44:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:44:33,361 INFO L87 Difference]: Start difference. First operand 356 states and 502 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) [2022-11-18 20:44:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:50,186 INFO L93 Difference]: Finished difference Result 406 states and 566 transitions. [2022-11-18 20:44:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:44:50,187 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 [2022-11-18 20:44:50,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:50,189 INFO L225 Difference]: With dead ends: 406 [2022-11-18 20:44:50,189 INFO L226 Difference]: Without dead ends: 404 [2022-11-18 20:44:50,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:44:50,190 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 297 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 3954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:50,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1236 Invalid, 3954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3703 Invalid, 0 Unknown, 169 Unchecked, 15.0s Time] [2022-11-18 20:44:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-18 20:44:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 387. [2022-11-18 20:44:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 248 states have (on average 1.3588709677419355) internal successors, (337), 303 states have internal predecessors, (337), 53 states have call successors, (53), 22 states have call predecessors, (53), 35 states have return successors, (154), 61 states have call predecessors, (154), 53 states have call successors, (154) [2022-11-18 20:44:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 544 transitions. [2022-11-18 20:44:50,205 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 544 transitions. Word has length 45 [2022-11-18 20:44:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:50,206 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 544 transitions. [2022-11-18 20:44:50,206 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) [2022-11-18 20:44:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 544 transitions. [2022-11-18 20:44:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:44:50,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:50,208 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 8, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:44:50,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:50,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:50,421 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:44:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1680317002, now seen corresponding path program 4 times [2022-11-18 20:44:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:44:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393586045] [2022-11-18 20:44:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:44:50,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:44:50,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:44:50,423 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:44:50,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:44:51,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:44:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:44:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:51,214 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 7 [2022-11-18 20:44:51,253 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4514 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4514))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:44:51,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4515 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4515) |c_#valid|)) is different from true [2022-11-18 20:44:51,287 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 [2022-11-18 20:44:51,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4515 (_ BitVec 1)) (v_nondet_tree_~n~0.base_318 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4515) v_nondet_tree_~n~0.base_318 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:44:51,378 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4515 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_318 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4515) v_nondet_tree_~n~0.base_318 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-18 20:44:53,656 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-18 20:44:53,656 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 39 treesize of output 66 [2022-11-18 20:44:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 246 proven. 11 refuted. 0 times theorem prover too weak. 146 trivial. 55 not checked. [2022-11-18 20:44:53,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:55,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:44:55,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393586045] [2022-11-18 20:44:55,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393586045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:55,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049003784] [2022-11-18 20:44:55,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:44:55,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:44:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:44:55,251 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:44:55,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-18 20:44:56,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:44:56,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:44:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:56,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:44:56,625 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4747 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4747) |c_#valid|)) is different from true [2022-11-18 20:44:56,641 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4748 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4748) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:45:00,936 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4747 (_ BitVec 1)) (v_ArrVal_4748 (_ BitVec 1)) (v_nondet_tree_~n~0.base_340 (_ BitVec 32)) (v_nondet_tree_~n~0.base_339 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4747))) (and (= (select .cse0 v_nondet_tree_~n~0.base_339) (_ bv0 1)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_339 v_ArrVal_4748) v_nondet_tree_~n~0.base_340 (_ bv1 1)))))) is different from true [2022-11-18 20:45:08,605 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4747 (_ BitVec 1)) (v_ArrVal_4748 (_ BitVec 1)) (v_nondet_tree_~n~0.base_340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_339 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4747))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_339 v_ArrVal_4748) v_nondet_tree_~n~0.base_340 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (bvadd (_ bv1 1) (select .cse0 nondet_tree_~n~0.base)) (_ bv0 1)) (= (select .cse1 v_nondet_tree_~n~0.base_339) (_ bv0 1)))))) is different from true [2022-11-18 20:45:08,785 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-18 20:45:08,785 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 5 case distinctions, treesize of input 115 treesize of output 148 [2022-11-18 20:45:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 246 proven. 11 refuted. 0 times theorem prover too weak. 146 trivial. 55 not checked. [2022-11-18 20:45:08,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049003784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:09,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:09,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-18 20:45:09,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449306120] [2022-11-18 20:45:09,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:45:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:45:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:45:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=15, NotChecked=198, Total=306 [2022-11-18 20:45:09,220 INFO L87 Difference]: Start difference. First operand 387 states and 544 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-18 20:45:18,454 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4515 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_318 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4515) v_nondet_tree_~n~0.base_318 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) (exists ((v_ArrVal_4748 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_339 (_ BitVec 32))) (and (= (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_339 v_ArrVal_4748) nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_339) (_ bv0 1)))) (exists ((v_ArrVal_4747 (_ BitVec 1)) (v_ArrVal_4748 (_ BitVec 1)) (v_nondet_tree_~n~0.base_340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_339 (_ BitVec 32))) (let ((.cse2 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4747))) (let ((.cse1 (store (store .cse2 v_nondet_tree_~n~0.base_339 v_ArrVal_4748) v_nondet_tree_~n~0.base_340 (_ bv1 1)))) (and (= |c_#valid| .cse1) (= (bvadd (_ bv1 1) (select .cse1 nondet_tree_~n~0.base)) (_ bv0 1)) (= (select .cse2 v_nondet_tree_~n~0.base_339) (_ bv0 1))))))) is different from true [2022-11-18 20:45:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:37,557 INFO L93 Difference]: Finished difference Result 396 states and 577 transitions. [2022-11-18 20:45:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:45:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 101 [2022-11-18 20:45:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:37,561 INFO L225 Difference]: With dead ends: 396 [2022-11-18 20:45:37,561 INFO L226 Difference]: Without dead ends: 396 [2022-11-18 20:45:37,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 193 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=69, Invalid=102, Unknown=25, NotChecked=310, Total=506 [2022-11-18 20:45:37,562 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 91 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2265 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:37,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 385 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 236 Invalid, 0 Unknown, 2265 Unchecked, 0.5s Time] [2022-11-18 20:45:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-18 20:45:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2022-11-18 20:45:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 254 states have (on average 1.3543307086614174) internal successors, (344), 308 states have internal predecessors, (344), 54 states have call successors, (54), 22 states have call predecessors, (54), 36 states have return successors, (179), 64 states have call predecessors, (179), 54 states have call successors, (179) [2022-11-18 20:45:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 577 transitions. [2022-11-18 20:45:37,592 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 577 transitions. Word has length 101 [2022-11-18 20:45:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:37,593 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 577 transitions. [2022-11-18 20:45:37,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-18 20:45:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 577 transitions. [2022-11-18 20:45:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:45:37,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:37,595 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 8, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:45:37,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:37,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:45:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:38,006 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:45:38,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1680317001, now seen corresponding path program 4 times [2022-11-18 20:45:38,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4995855] [2022-11-18 20:45:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:38,008 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:38,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:45:38,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:38,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:45:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:38,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:45:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:39,016 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4981 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4981))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:45:39,053 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 [2022-11-18 20:45:39,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_360 (_ 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_360 (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:45:39,177 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_361 (_ BitVec 32)) (v_ArrVal_4981 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_361) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_361 v_ArrVal_4981) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_360 (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:45:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:39,359 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-18 20:45:39,359 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 [2022-11-18 20:45:39,386 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:45:39,386 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 [2022-11-18 20:45:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 246 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 63 not checked. [2022-11-18 20:45:39,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:39,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:45:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4995855] [2022-11-18 20:45:39,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4995855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555453204] [2022-11-18 20:45:39,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:39,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:45:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:45:39,947 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:45:39,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-18 20:45:41,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:41,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:45:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:41,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:41,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:45:41,712 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5211 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5211))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_5210 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5210))))) is different from true [2022-11-18 20:45:41,753 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5212 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5212) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:45:41,840 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5212 (_ BitVec 32)) (v_nondet_tree_~n~0.base_381 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5212) v_nondet_tree_~n~0.base_381 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:45:41,958 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_382 (_ BitVec 32)) (v_ArrVal_5212 (_ BitVec 32)) (v_nondet_tree_~n~0.base_381 (_ BitVec 32)) (v_ArrVal_5210 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5211 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_382 v_ArrVal_5211) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_382 v_ArrVal_5210) nondet_tree_~n~0.base v_ArrVal_5212) v_nondet_tree_~n~0.base_381 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_382) (_ bv0 1)))) is different from true [2022-11-18 20:45:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:42,200 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-18 20:45:42,200 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 [2022-11-18 20:45:42,266 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-18 20:45:42,266 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 [2022-11-18 20:45:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 66 not checked. [2022-11-18 20:45:42,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:46,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555453204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:46,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:46,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-11-18 20:45:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012375965] [2022-11-18 20:45:46,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:45:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:45:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:45:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=56, Unknown=10, NotChecked=168, Total=272 [2022-11-18 20:45:46,976 INFO L87 Difference]: Start difference. First operand 395 states and 577 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:45:47,659 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5212 (_ BitVec 32)) (v_nondet_tree_~n~0.base_381 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5212) v_nondet_tree_~n~0.base_381 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_nondet_tree_~n~0.base_360 (_ 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_360 (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:45:47,669 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_382 (_ BitVec 32)) (v_ArrVal_5212 (_ BitVec 32)) (v_nondet_tree_~n~0.base_381 (_ BitVec 32)) (v_ArrVal_5210 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5211 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_382 v_ArrVal_5211) nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_382 v_ArrVal_5210) nondet_tree_~n~0.base v_ArrVal_5212) v_nondet_tree_~n~0.base_381 (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_382) (_ bv0 1)))) (exists ((v_nondet_tree_~n~0.base_360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_361 (_ BitVec 32)) (v_ArrVal_4981 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_361) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_361 v_ArrVal_4981) nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_360 (_ bv12 32)) |c_#length|)))) is different from true [2022-11-18 20:45:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:47,972 INFO L93 Difference]: Finished difference Result 402 states and 589 transitions. [2022-11-18 20:45:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:45:47,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) Word has length 101 [2022-11-18 20:45:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:47,976 INFO L225 Difference]: With dead ends: 402 [2022-11-18 20:45:47,976 INFO L226 Difference]: Without dead ends: 402 [2022-11-18 20:45:47,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=57, Invalid=80, Unknown=13, NotChecked=270, Total=420 [2022-11-18 20:45:47,979 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 176 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1670 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:47,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 190 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 1670 Unchecked, 0.8s Time] [2022-11-18 20:45:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-18 20:45:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-18 20:45:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 259 states have (on average 1.3436293436293436) internal successors, (348), 313 states have internal predecessors, (348), 55 states have call successors, (55), 22 states have call predecessors, (55), 37 states have return successors, (186), 66 states have call predecessors, (186), 55 states have call successors, (186) [2022-11-18 20:45:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 589 transitions. [2022-11-18 20:45:48,009 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 589 transitions. Word has length 101 [2022-11-18 20:45:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:48,009 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 589 transitions. [2022-11-18 20:45:48,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:45:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 589 transitions. [2022-11-18 20:45:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:45:48,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:48,011 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:45:48,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:48,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:45:48,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:48,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:45:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1392256822, now seen corresponding path program 6 times [2022-11-18 20:45:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:48,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690630531] [2022-11-18 20:45:48,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:48,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:48,427 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:48,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:45:49,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:45:49,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:45:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:49,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:49,215 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 [2022-11-18 20:45:49,407 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 [2022-11-18 20:45:49,496 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_402 (_ BitVec 32))) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_402 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)))) is different from true [2022-11-18 20:45:49,661 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#res.base| (_ BitVec 32)) (v_nondet_tree_~n~0.base_402 (_ BitVec 32)) (v_ArrVal_5339 (_ BitVec 32)) (v_nondet_tree_~n~0.base_403 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (store (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_5339) v_nondet_tree_~n~0.base_402 (_ bv12 32)) v_nondet_tree_~n~0.base_403 (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:45:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:45:49,788 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-18 20:45:49,788 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 [2022-11-18 20:45:49,830 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:45:49,831 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 [2022-11-18 20:45:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 71 not checked. [2022-11-18 20:45:49,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:52,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:45:52,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690630531] [2022-11-18 20:45:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690630531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487577305] [2022-11-18 20:45:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:52,491 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:45:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:45:52,493 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:45:52,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-18 20:45:53,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:53,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69246781] [2022-11-18 20:45:53,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:53,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:53,422 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:53,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-18 20:45:53,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 1 [2022-11-18 20:46:01,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:46:01,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:46:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:01,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:46:01,528 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5570 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5570))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:01,623 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5570 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_422 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_422)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_422 v_ArrVal_5570) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:46:01,725 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5570 (_ BitVec 32)) (v_nondet_tree_~n~0.base_423 (_ BitVec 32)) (v_nondet_tree_~n~0.base_422 (_ BitVec 32)) (v_ArrVal_5569 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5569) v_nondet_tree_~n~0.base_422 v_ArrVal_5570) v_nondet_tree_~n~0.base_423 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_422) (_ bv0 1)))) is different from true [2022-11-18 20:46:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:01,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:01,979 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-18 20:46:01,980 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 3 case distinctions, treesize of input 18 treesize of output 32 [2022-11-18 20:46:02,026 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:46:02,026 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 [2022-11-18 20:46:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 78 not checked. [2022-11-18 20:46:02,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:04,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69246781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:04,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:04,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-11-18 20:46:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337544129] [2022-11-18 20:46:04,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:46:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:46:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:46:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=108, Unknown=8, NotChecked=150, Total=306 [2022-11-18 20:46:04,798 INFO L87 Difference]: Start difference. First operand 402 states and 589 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:46:05,610 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_402 (_ BitVec 32))) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_402 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)))) (exists ((v_ArrVal_5570 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_422 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_422)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_422 v_ArrVal_5570) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)))) is different from true [2022-11-18 20:46:11,919 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5570 (_ BitVec 32)) (v_nondet_tree_~n~0.base_423 (_ BitVec 32)) (v_nondet_tree_~n~0.base_422 (_ BitVec 32)) (v_ArrVal_5569 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5569) v_nondet_tree_~n~0.base_422 v_ArrVal_5570) v_nondet_tree_~n~0.base_423 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_422) (_ bv0 1)))) (exists ((|nondet_tree_#res.base| (_ BitVec 32)) (v_nondet_tree_~n~0.base_402 (_ BitVec 32)) (v_ArrVal_5339 (_ BitVec 32)) (v_nondet_tree_~n~0.base_403 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (store (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_5339) v_nondet_tree_~n~0.base_402 (_ bv12 32)) v_nondet_tree_~n~0.base_403 (_ bv12 32)) |c_#length|)))) is different from true [2022-11-18 20:46:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:12,118 INFO L93 Difference]: Finished difference Result 404 states and 591 transitions. [2022-11-18 20:46:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:46:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) Word has length 59 [2022-11-18 20:46:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:12,122 INFO L225 Difference]: With dead ends: 404 [2022-11-18 20:46:12,122 INFO L226 Difference]: Without dead ends: 404 [2022-11-18 20:46:12,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=65, Invalid=164, Unknown=13, NotChecked=264, Total=506 [2022-11-18 20:46:12,124 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 95 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1747 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:12,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 331 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 310 Invalid, 0 Unknown, 1747 Unchecked, 0.9s Time] [2022-11-18 20:46:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-18 20:46:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 403. [2022-11-18 20:46:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 260 states have (on average 1.3461538461538463) internal successors, (350), 313 states have internal predecessors, (350), 55 states have call successors, (55), 22 states have call predecessors, (55), 37 states have return successors, (186), 67 states have call predecessors, (186), 55 states have call successors, (186) [2022-11-18 20:46:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 591 transitions. [2022-11-18 20:46:12,146 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 591 transitions. Word has length 59 [2022-11-18 20:46:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:12,146 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 591 transitions. [2022-11-18 20:46:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:46:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 591 transitions. [2022-11-18 20:46:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:46:12,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:12,149 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:46:12,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:12,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:46:12,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:46:12,569 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:46:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1392256823, now seen corresponding path program 5 times [2022-11-18 20:46:12,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:46:12,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445890281] [2022-11-18 20:46:12,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:12,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:46:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:46:12,572 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:46:12,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-18 20:46:13,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 20:46:13,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:46:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:13,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:46:13,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5694 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5694) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:13,543 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5695 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5695))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:13,573 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5696 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5696) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:13,613 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5696) |c_#valid|))) is different from true [2022-11-18 20:46:13,686 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32)) (v_ArrVal_5695 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5695))) (and (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_443 v_ArrVal_5696)) (= (select .cse0 v_nondet_tree_~n~0.base_443) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:46:13,808 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32)) (v_nondet_tree_~n~0.base_444 (_ BitVec 32)) (v_ArrVal_5695 (_ BitVec 1)) (v_ArrVal_5694 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5694))) (let ((.cse0 (store .cse1 v_nondet_tree_~n~0.base_444 v_ArrVal_5695))) (and (= (store .cse0 v_nondet_tree_~n~0.base_443 v_ArrVal_5696) |c_#valid|) (= (select .cse0 v_nondet_tree_~n~0.base_443) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_444)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-11-18 20:46:14,200 INFO L321 Elim1Store]: treesize reduction 132, result has 29.4 percent of original size [2022-11-18 20:46:14,200 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 141 treesize of output 180 [2022-11-18 20:46:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 81 not checked. [2022-11-18 20:46:14,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:16,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:46:16,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445890281] [2022-11-18 20:46:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445890281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [897980418] [2022-11-18 20:46:16,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:16,720 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:46:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:46:16,721 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:46:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-18 20:46:17,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934415046] [2022-11-18 20:46:17,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:17,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:17,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 1 [2022-11-18 20:46:17,645 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:17,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-18 20:46:33,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 20:46:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:46:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:33,900 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5936 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5936))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:33,926 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5937 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5937))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:33,957 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5937 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5937)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:46:34,019 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5936 (_ BitVec 1)) (v_ArrVal_5937 (_ BitVec 1)) (v_nondet_tree_~n~0.base_464 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_464 v_ArrVal_5936))) (and (= (_ bv0 1) (select .cse0 nondet_tree_~n~0.base)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_464)) (= (store .cse0 nondet_tree_~n~0.base v_ArrVal_5937) |c_#valid|)))) is different from true [2022-11-18 20:46:36,606 INFO L321 Elim1Store]: treesize reduction 144, result has 23.0 percent of original size [2022-11-18 20:46:36,606 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 114 treesize of output 141 [2022-11-18 20:46:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 52 not checked. [2022-11-18 20:46:36,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:43,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934415046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:43,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:43,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2022-11-18 20:46:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171310955] [2022-11-18 20:46:43,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:43,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:46:43,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:46:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:46:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=56, Unknown=15, NotChecked=230, Total=342 [2022-11-18 20:46:43,135 INFO L87 Difference]: Start difference. First operand 403 states and 591 transitions. Second operand has 17 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-18 20:46:45,258 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5696) |c_#valid|))) (exists ((v_ArrVal_5937 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5937)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:46:45,529 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5936 (_ BitVec 1)) (v_ArrVal_5937 (_ BitVec 1)) (v_nondet_tree_~n~0.base_464 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_464 v_ArrVal_5936))) (and (= (_ bv0 1) (select .cse0 nondet_tree_~n~0.base)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_464)) (= (store .cse0 nondet_tree_~n~0.base v_ArrVal_5937) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32)) (v_ArrVal_5695 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5695))) (and (= |c_#valid| (store .cse1 v_nondet_tree_~n~0.base_443 v_ArrVal_5696)) (= (select .cse1 v_nondet_tree_~n~0.base_443) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-11-18 20:46:49,614 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5696 (_ BitVec 1)) (v_nondet_tree_~n~0.base_443 (_ BitVec 32)) (v_nondet_tree_~n~0.base_444 (_ BitVec 32)) (v_ArrVal_5695 (_ BitVec 1)) (v_ArrVal_5694 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5694))) (let ((.cse0 (store .cse1 v_nondet_tree_~n~0.base_444 v_ArrVal_5695))) (and (= (store .cse0 v_nondet_tree_~n~0.base_443 v_ArrVal_5696) |c_#valid|) (= (select .cse0 v_nondet_tree_~n~0.base_443) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_444)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) (exists ((v_ArrVal_5936 (_ BitVec 1)) (v_ArrVal_5937 (_ BitVec 1)) (v_nondet_tree_~n~0.base_464 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_465 (_ BitVec 32))) (let ((.cse3 (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)))) (let ((.cse2 (store .cse3 v_nondet_tree_~n~0.base_464 v_ArrVal_5936))) (and (= (_ bv0 1) (select .cse2 v_nondet_tree_~n~0.base_465)) (= |c_#valid| (store .cse2 v_nondet_tree_~n~0.base_465 v_ArrVal_5937)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select .cse3 v_nondet_tree_~n~0.base_464) (_ bv0 1))))))) is different from true [2022-11-18 20:46:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:51,869 INFO L93 Difference]: Finished difference Result 404 states and 592 transitions. [2022-11-18 20:46:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:46:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 14 states have call successors, (16) Word has length 59 [2022-11-18 20:46:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:51,871 INFO L225 Difference]: With dead ends: 404 [2022-11-18 20:46:51,872 INFO L226 Difference]: Without dead ends: 404 [2022-11-18 20:46:51,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=70, Invalid=116, Unknown=22, NotChecked=442, Total=650 [2022-11-18 20:46:51,872 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 86 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2381 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:51,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 386 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 2381 Unchecked, 0.4s Time] [2022-11-18 20:46:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-18 20:46:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 402. [2022-11-18 20:46:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 259 states have (on average 1.3436293436293436) internal successors, (348), 313 states have internal predecessors, (348), 55 states have call successors, (55), 22 states have call predecessors, (55), 37 states have return successors, (186), 66 states have call predecessors, (186), 55 states have call successors, (186) [2022-11-18 20:46:51,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 589 transitions. [2022-11-18 20:46:51,889 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 589 transitions. Word has length 59 [2022-11-18 20:46:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:51,890 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 589 transitions. [2022-11-18 20:46:51,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-18 20:46:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 589 transitions. [2022-11-18 20:46:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:46:51,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:51,892 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] [2022-11-18 20:46:51,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-18 20:46:52,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:52,309 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting minErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:46:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1454919710, now seen corresponding path program 1 times [2022-11-18 20:46:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:46:52,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291345283] [2022-11-18 20:46:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:52,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:46:52,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:46:52,311 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:46:52,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-18 20:46:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:52,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:46:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:46:53,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:55,084 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 [2022-11-18 20:46:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:46:55,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:46:55,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291345283] [2022-11-18 20:46:55,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291345283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:55,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:55,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-18 20:46:55,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948024426] [2022-11-18 20:46:55,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:46:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:46:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:46:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:46:55,252 INFO L87 Difference]: Start difference. First operand 402 states and 589 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) [2022-11-18 20:47:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:04,548 INFO L93 Difference]: Finished difference Result 441 states and 640 transitions. [2022-11-18 20:47:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:47:04,549 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 [2022-11-18 20:47:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:04,551 INFO L225 Difference]: With dead ends: 441 [2022-11-18 20:47:04,551 INFO L226 Difference]: Without dead ends: 441 [2022-11-18 20:47:04,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:47:04,552 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 179 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:04,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 657 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1373 Invalid, 0 Unknown, 335 Unchecked, 8.3s Time] [2022-11-18 20:47:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-18 20:47:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 406. [2022-11-18 20:47:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 262 states have (on average 1.33206106870229) internal successors, (349), 316 states have internal predecessors, (349), 55 states have call successors, (55), 23 states have call predecessors, (55), 38 states have return successors, (186), 66 states have call predecessors, (186), 55 states have call successors, (186) [2022-11-18 20:47:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 590 transitions. [2022-11-18 20:47:04,579 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 590 transitions. Word has length 48 [2022-11-18 20:47:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:04,580 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 590 transitions. [2022-11-18 20:47:04,580 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) [2022-11-18 20:47:04,580 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 590 transitions. [2022-11-18 20:47:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:47:04,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:04,582 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] [2022-11-18 20:47:04,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:04,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:04,797 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:47:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1592442388, now seen corresponding path program 3 times [2022-11-18 20:47:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:47:04,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224892726] [2022-11-18 20:47:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:47:04,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:04,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:47:04,800 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:47:04,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:47:05,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:47:05,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 20:47:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:05,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:05,511 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 [2022-11-18 20:47:05,525 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 [2022-11-18 20:47:05,889 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6079 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_6079))) (exists ((v_ArrVal_6080 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_6080) |c_#memory_$Pointer$.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:05,931 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 [2022-11-18 20:47:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:05,939 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 [2022-11-18 20:47:05,960 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:47:05,961 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 [2022-11-18 20:47:06,016 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 [2022-11-18 20:47:06,028 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 [2022-11-18 20:47:06,418 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 [2022-11-18 20:47:06,424 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 [2022-11-18 20:47:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-18 20:47:06,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:08,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:47:08,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224892726] [2022-11-18 20:47:08,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224892726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:08,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040282877] [2022-11-18 20:47:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:47:08,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:47:08,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:47:08,672 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:47:08,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-18 20:47:09,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:47:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-18 20:47:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:09,911 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 [2022-11-18 20:47:09,919 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 [2022-11-18 20:47:10,487 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-18 20:47:10,497 INFO L350 Elim1Store]: Elim1 eliminated variable 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 [2022-11-18 20:47:10,710 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 [2022-11-18 20:47:10,720 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 [2022-11-18 20:47:10,731 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| c_nondet_tree_~n~0.base v_arrayElimArr_4)))) (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.base)| c_nondet_tree_~n~0.base v_arrayElimArr_3) |c_#memory_$Pointer$.base|) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32))))) is different from true [2022-11-18 20:47:10,752 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)) (= (store |c_old(#memory_$Pointer$.base)| |c_nondet_tree_#res.base| v_arrayElimArr_3) |c_#memory_$Pointer$.base|))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.offset)| |c_nondet_tree_#res.base| v_arrayElimArr_4) |c_#memory_$Pointer$.offset|) (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32))))) is different from true [2022-11-18 20:47:10,799 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:47:10,799 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 [2022-11-18 20:47:10,808 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 [2022-11-18 20:47:10,848 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:47:10,849 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 [2022-11-18 20:47:10,862 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 20:47:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:47:11,068 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:47:11,068 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 [2022-11-18 20:47:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:11,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:47:11,082 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:47:11,082 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 [2022-11-18 20:47:12,221 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:47:12,221 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 [2022-11-18 20:47:12,238 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:47:12,239 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 [2022-11-18 20:47:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-11-18 20:47:12,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:18,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:18,842 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 [2022-11-18 20:47:18,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:18,865 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 [2022-11-18 20:47:18,889 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset))) (and (forall ((|v_nondet_tree_#t~ret9.base_587| (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_5 (_ bv4 32)) (_ bv0 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |v_nondet_tree_#t~ret9.base_587| v_arrayElimArr_5) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)))) (forall ((|v_nondet_tree_#t~ret9.base_587| (_ BitVec 32)) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_6 (_ bv4 32)) (_ bv0 32))) (= (select (select (store |c_#memory_$Pointer$.base| |v_nondet_tree_#t~ret9.base_587| v_arrayElimArr_6) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)))))) is different from false [2022-11-18 20:47:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1040282877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:18,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:47:18,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 39 [2022-11-18 20:47:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522133120] [2022-11-18 20:47:18,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:47:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:47:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:47:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=16, NotChecked=292, Total=1640 [2022-11-18 20:47:18,895 INFO L87 Difference]: Start difference. First operand 406 states and 590 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) [2022-11-18 20:47:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:28,134 INFO L93 Difference]: Finished difference Result 469 states and 672 transitions. [2022-11-18 20:47:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:47:28,135 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 [2022-11-18 20:47:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:28,138 INFO L225 Difference]: With dead ends: 469 [2022-11-18 20:47:28,138 INFO L226 Difference]: Without dead ends: 469 [2022-11-18 20:47:28,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=287, Invalid=3014, Unknown=21, NotChecked=460, Total=3782 [2022-11-18 20:47:28,140 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 297 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 4387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1128 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:28,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2165 Invalid, 4387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3136 Invalid, 0 Unknown, 1128 Unchecked, 7.2s Time] [2022-11-18 20:47:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-18 20:47:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 426. [2022-11-18 20:47:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 277 states have (on average 1.3212996389891696) internal successors, (366), 331 states have internal predecessors, (366), 58 states have call successors, (58), 25 states have call predecessors, (58), 40 states have return successors, (190), 69 states have call predecessors, (190), 58 states have call successors, (190) [2022-11-18 20:47:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 614 transitions. [2022-11-18 20:47:28,158 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 614 transitions. Word has length 45 [2022-11-18 20:47:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:28,159 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 614 transitions. [2022-11-18 20:47:28,159 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) [2022-11-18 20:47:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 614 transitions. [2022-11-18 20:47:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:47:28,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:28,161 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:47:28,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:28,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:47:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:28,570 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:47:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -608712274, now seen corresponding path program 7 times [2022-11-18 20:47:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:47:28,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410644492] [2022-11-18 20:47:28,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:47:28,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:47:28,573 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:47:28,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:47:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:47:29,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:29,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:29,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:29,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6433 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6433) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:29,544 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6433 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6433) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:29,570 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 [2022-11-18 20:47:29,628 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6433 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_520 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6433) v_nondet_tree_~n~0.base_520 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:29,701 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:47:29,701 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 [2022-11-18 20:47:29,720 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:47:29,721 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 [2022-11-18 20:47:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 164 proven. 14 refuted. 0 times theorem prover too weak. 80 trivial. 40 not checked. [2022-11-18 20:47:29,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:30,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:47:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410644492] [2022-11-18 20:47:30,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410644492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [520868175] [2022-11-18 20:47:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:47:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:47:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:47:30,124 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:47:30,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-18 20:47:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:47:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:31,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:31,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:31,615 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6614 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6614) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:31,651 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6614 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6614) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:31,739 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_531 (_ BitVec 32)) (v_ArrVal_6614 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_531 v_ArrVal_6614) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_531)))) is different from true [2022-11-18 20:47:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:31,828 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:47:31,828 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 [2022-11-18 20:47:31,843 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:47:31,844 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 [2022-11-18 20:47:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 164 proven. 14 refuted. 0 times theorem prover too weak. 80 trivial. 40 not checked. [2022-11-18 20:47:31,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:32,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [520868175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:32,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:47:32,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:47:32,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108394173] [2022-11-18 20:47:32,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:32,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:47:32,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:47:32,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:47:32,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=45, Unknown=7, NotChecked=126, Total=210 [2022-11-18 20:47:32,574 INFO L87 Difference]: Start difference. First operand 426 states and 614 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 20:47:32,871 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_531 (_ BitVec 32)) (v_ArrVal_6614 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_531 v_ArrVal_6614) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_531)))) (exists ((v_ArrVal_6433 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_520 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6433) v_nondet_tree_~n~0.base_520 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:47:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:33,466 INFO L93 Difference]: Finished difference Result 427 states and 615 transitions. [2022-11-18 20:47:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:47:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 83 [2022-11-18 20:47:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:33,471 INFO L225 Difference]: With dead ends: 427 [2022-11-18 20:47:33,471 INFO L226 Difference]: Without dead ends: 427 [2022-11-18 20:47:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=56, Unknown=8, NotChecked=168, Total=272 [2022-11-18 20:47:33,471 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 174 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1353 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:33,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 179 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 1353 Unchecked, 0.7s Time] [2022-11-18 20:47:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-18 20:47:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 426. [2022-11-18 20:47:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 277 states have (on average 1.3212996389891696) internal successors, (366), 331 states have internal predecessors, (366), 58 states have call successors, (58), 25 states have call predecessors, (58), 40 states have return successors, (190), 69 states have call predecessors, (190), 58 states have call successors, (190) [2022-11-18 20:47:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 614 transitions. [2022-11-18 20:47:33,488 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 614 transitions. Word has length 83 [2022-11-18 20:47:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 614 transitions. [2022-11-18 20:47:33,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 20:47:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 614 transitions. [2022-11-18 20:47:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 20:47:33,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:33,491 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:47:33,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:33,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:47:33,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:33,908 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:47:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1138377262, now seen corresponding path program 5 times [2022-11-18 20:47:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:47:33,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366973582] [2022-11-18 20:47:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:47:33,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:47:33,912 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:47:33,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-18 20:47:35,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:47:35,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:35,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:47:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:35,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:35,332 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6777 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6777) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:35,379 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6777 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6777) |c_#valid|))) is different from true [2022-11-18 20:47:35,406 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6778 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6778) |c_#valid|)) is different from true [2022-11-18 20:47:35,423 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6779 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6779))) is different from true [2022-11-18 20:47:35,488 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 [2022-11-18 20:47:35,505 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6778 (_ BitVec 1)) (v_nondet_tree_~n~0.base_542 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6778) v_nondet_tree_~n~0.base_542 (_ bv1 1)))) is different from true [2022-11-18 20:47:39,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:47:39,886 INFO L321 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2022-11-18 20:47:39,887 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 [2022-11-18 20:47:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 127 proven. 19 refuted. 0 times theorem prover too weak. 55 trivial. 47 not checked. [2022-11-18 20:47:39,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:40,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:47:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366973582] [2022-11-18 20:47:40,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366973582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:40,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450593307] [2022-11-18 20:47:40,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:47:40,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:47:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:47:40,572 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:47:40,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-18 20:47:42,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:47:42,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:47:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:42,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:47:42,996 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6954 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:43,031 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6954 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:43,060 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6955 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6955))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:43,089 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6956 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:43,133 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:47:43,200 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6955 (_ BitVec 1)) (v_nondet_tree_~n~0.base_572 (_ BitVec 32)) (v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_572 v_ArrVal_6955))) (and (= (store .cse0 nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_572))))) is different from true [2022-11-18 20:47:43,318 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6955 (_ BitVec 1)) (v_nondet_tree_~n~0.base_573 (_ BitVec 32)) (v_ArrVal_6954 (_ BitVec 1)) (v_nondet_tree_~n~0.base_572 (_ BitVec 32)) (v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954))) (let ((.cse0 (store .cse1 v_nondet_tree_~n~0.base_572 v_ArrVal_6955))) (and (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_573 v_ArrVal_6956)) (= (select .cse0 v_nondet_tree_~n~0.base_573) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_572)))))) is different from true [2022-11-18 20:47:43,604 INFO L321 Elim1Store]: treesize reduction 132, result has 29.4 percent of original size [2022-11-18 20:47:43,604 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 141 treesize of output 180 [2022-11-18 20:47:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 66 not checked. [2022-11-18 20:47:43,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:50,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450593307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:50,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:47:50,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-11-18 20:47:50,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8523121] [2022-11-18 20:47:50,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:50,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:47:50,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:47:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:47:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=61, Unknown=16, NotChecked=338, Total=462 [2022-11-18 20:47:50,124 INFO L87 Difference]: Start difference. First operand 426 states and 614 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-18 20:47:58,277 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6777 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6777) |c_#valid|))) (exists ((v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6779 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6779))) (exists ((v_ArrVal_6954 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:47:58,283 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_6779 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6779))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6777 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6777) |c_#valid|))) (exists ((v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6954 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:47:58,287 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_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:47:58,662 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6955 (_ BitVec 1)) (v_nondet_tree_~n~0.base_572 (_ BitVec 32)) (v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_572 v_ArrVal_6955))) (and (= (store .cse0 nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_572))))) (exists ((v_ArrVal_6778 (_ BitVec 1)) (v_nondet_tree_~n~0.base_542 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6778) v_nondet_tree_~n~0.base_542 (_ bv1 1))))) is different from true [2022-11-18 20:47:58,667 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_6778 (_ BitVec 1)) (v_nondet_tree_~n~0.base_542 (_ BitVec 32))) (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6778) v_nondet_tree_~n~0.base_542 (_ bv1 1)) |c_#valid|)))) (exists ((v_ArrVal_6955 (_ BitVec 1)) (v_nondet_tree_~n~0.base_572 (_ BitVec 32)) (v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_572 v_ArrVal_6955))) (and (= (store .cse0 nondet_tree_~n~0.base v_ArrVal_6956) |c_#valid|) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_572)))))) is different from true [2022-11-18 20:47:58,697 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6778 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6777 (_ BitVec 1)) (v_nondet_tree_~n~0.base_542 (_ BitVec 32)) (v_nondet_tree_~n~0.base_543 (_ BitVec 32))) (and (= (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6777) v_nondet_tree_~n~0.base_543 v_ArrVal_6778) v_nondet_tree_~n~0.base_542 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (bvadd (select |c_#valid| v_nondet_tree_~n~0.base_543) (_ bv1 1))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6955 (_ BitVec 1)) (v_nondet_tree_~n~0.base_573 (_ BitVec 32)) (v_ArrVal_6954 (_ BitVec 1)) (v_nondet_tree_~n~0.base_572 (_ BitVec 32)) (v_ArrVal_6956 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6954))) (let ((.cse0 (store .cse1 v_nondet_tree_~n~0.base_572 v_ArrVal_6955))) (and (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_573 v_ArrVal_6956)) (= (select .cse0 v_nondet_tree_~n~0.base_573) (_ bv0 1)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_572))))))) is different from true [2022-11-18 20:47:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:58,937 INFO L93 Difference]: Finished difference Result 432 states and 639 transitions. [2022-11-18 20:47:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:47:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) Word has length 77 [2022-11-18 20:47:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:58,940 INFO L225 Difference]: With dead ends: 432 [2022-11-18 20:47:58,940 INFO L226 Difference]: Without dead ends: 432 [2022-11-18 20:47:58,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 19 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=66, Invalid=77, Unknown=23, NotChecked=646, Total=812 [2022-11-18 20:47:58,941 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 89 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2891 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:58,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 314 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 235 Invalid, 0 Unknown, 2891 Unchecked, 0.6s Time] [2022-11-18 20:47:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-18 20:47:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 431. [2022-11-18 20:47:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 281 states have (on average 1.3202846975088969) internal successors, (371), 334 states have internal predecessors, (371), 58 states have call successors, (58), 25 states have call predecessors, (58), 41 states have return successors, (210), 71 states have call predecessors, (210), 58 states have call successors, (210) [2022-11-18 20:47:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 639 transitions. [2022-11-18 20:47:58,959 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 639 transitions. Word has length 77 [2022-11-18 20:47:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:58,960 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 639 transitions. [2022-11-18 20:47:58,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 14 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-18 20:47:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 639 transitions. [2022-11-18 20:47:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:47:58,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:58,963 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 7, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1] [2022-11-18 20:47:58,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:59,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:59,387 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:47:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash 132583403, now seen corresponding path program 5 times [2022-11-18 20:47:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:47:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760181689] [2022-11-18 20:47:59,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:47:59,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:47:59,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:47:59,389 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:47:59,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:48:00,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-18 20:48:00,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:48:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:48:00,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:48:01,150 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7151 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7151) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:48:01,201 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7152 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7152) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:48:01,242 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 [2022-11-18 20:48:01,311 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_593 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7152 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_593)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_593 v_ArrVal_7152) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:48:01,409 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_593 (_ BitVec 32)) (v_nondet_tree_~n~0.base_594 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7152 (_ BitVec 32)) (v_ArrVal_7151 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_594 (_ bv1 1)) v_nondet_tree_~n~0.base_593)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_594) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_594 v_ArrVal_7151) v_nondet_tree_~n~0.base_593 v_ArrVal_7152) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:48:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:48:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:48:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:48:01,580 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-18 20:48:01,581 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 3 case distinctions, treesize of input 18 treesize of output 32 [2022-11-18 20:48:01,644 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:48:01,644 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 [2022-11-18 20:48:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 63 not checked. [2022-11-18 20:48:01,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:04,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:48:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760181689] [2022-11-18 20:48:04,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760181689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609995986] [2022-11-18 20:48:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:48:04,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:48:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:48:04,415 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:48:04,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-18 20:48:05,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:48:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627527013] [2022-11-18 20:48:05,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:48:05,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:05,407 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:05,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-18 20:48:05,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 1 [2022-11-18 20:49:27,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-18 20:49:27,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:49:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:28,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:49:28,021 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 5 [2022-11-18 20:49:28,269 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7515 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7515) |c_#length|)) (exists ((v_ArrVal_7516 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7516))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:49:28,315 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7517 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7517) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:49:28,357 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7517 (_ 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_7517) |c_#length|))) is different from true [2022-11-18 20:49:28,460 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7516 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_614 (_ BitVec 32)) (v_ArrVal_7517 (_ BitVec 32)) (v_ArrVal_7515 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7516) v_nondet_tree_~n~0.base_614)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7515) v_nondet_tree_~n~0.base_614 v_ArrVal_7517) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:49:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:49:34,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:49:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:49:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:49:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:49:34,910 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:49:34,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-18 20:49:34,993 INFO L321 Elim1Store]: treesize reduction 43, result has 29.5 percent of original size [2022-11-18 20:49:34,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 109 [2022-11-18 20:49:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 54 not checked. [2022-11-18 20:49:35,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:40,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627527013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:40,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:49:40,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-11-18 20:49:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881154293] [2022-11-18 20:49:40,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:49:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:49:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:49:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=109, Unknown=14, NotChecked=252, Total=420 [2022-11-18 20:49:40,490 INFO L87 Difference]: Start difference. First operand 431 states and 639 transitions. Second operand has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (15), 10 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-18 20:49:44,833 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(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (exists ((v_ArrVal_7151 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7151) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7151 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7151) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7517 (_ 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_7517) |c_#length|)))) is different from true [2022-11-18 20:49:44,838 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_7517 (_ 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_7517) |c_#length|)))) is different from true [2022-11-18 20:49:45,539 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7516 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_614 (_ BitVec 32)) (v_ArrVal_7517 (_ BitVec 32)) (v_ArrVal_7515 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7516) v_nondet_tree_~n~0.base_614)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7515) v_nondet_tree_~n~0.base_614 v_ArrVal_7517) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_nondet_tree_~n~0.base_593 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7152 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_593)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_593 v_ArrVal_7152) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)))) is different from true [2022-11-18 20:49:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:52,507 INFO L93 Difference]: Finished difference Result 468 states and 711 transitions. [2022-11-18 20:49:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:49:52,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (15), 10 states have call predecessors, (15), 12 states have call successors, (15) Word has length 83 [2022-11-18 20:49:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:52,511 INFO L225 Difference]: With dead ends: 468 [2022-11-18 20:49:52,512 INFO L226 Difference]: Without dead ends: 468 [2022-11-18 20:49:52,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=76, Invalid=190, Unknown=22, NotChecked=468, Total=756 [2022-11-18 20:49:52,513 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 94 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2380 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:52,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 351 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 444 Invalid, 0 Unknown, 2380 Unchecked, 1.1s Time] [2022-11-18 20:49:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-18 20:49:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 467. [2022-11-18 20:49:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 306 states have (on average 1.2973856209150327) internal successors, (397), 362 states have internal predecessors, (397), 63 states have call successors, (63), 27 states have call predecessors, (63), 47 states have return successors, (250), 77 states have call predecessors, (250), 63 states have call successors, (250) [2022-11-18 20:49:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 710 transitions. [2022-11-18 20:49:52,531 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 710 transitions. Word has length 83 [2022-11-18 20:49:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:52,532 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 710 transitions. [2022-11-18 20:49:52,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (15), 10 states have call predecessors, (15), 12 states have call successors, (15) [2022-11-18 20:49:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 710 transitions. [2022-11-18 20:49:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:49:52,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:52,534 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 8, 8, 8, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:49:52,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-18 20:49:52,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:52,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:52,955 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)] === [2022-11-18 20:49:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -798786448, now seen corresponding path program 6 times [2022-11-18 20:49:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:49:52,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702604284] [2022-11-18 20:49:52,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:49:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:49:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:49:52,958 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:49:52,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-18 20:49:54,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:49:54,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:49:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:54,528 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_7739 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7739))))) is different from true [2022-11-18 20:49:54,558 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 [2022-11-18 20:49:54,684 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7741 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7741) |c_#valid|)) is different from true [2022-11-18 20:50:02,996 INFO L321 Elim1Store]: treesize reduction 104, result has 24.1 percent of original size [2022-11-18 20:50:02,996 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 48 [2022-11-18 20:50:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 195 proven. 12 refuted. 3 times theorem prover too weak. 108 trivial. 44 not checked. [2022-11-18 20:50:03,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:04,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:04,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702604284] [2022-11-18 20:50:04,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702604284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:04,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1642151748] [2022-11-18 20:50:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:50:04,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:50:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:50:04,410 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:50:04,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-18 20:50:06,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:06,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467495411] [2022-11-18 20:50:06,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:50:06,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:06,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:06,523 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:06,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-18 20:50:06,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 1 [2022-11-18 20:52:49,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:52:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:52:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:49,990 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8140 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8140))) is different from true [2022-11-18 20:52:50,011 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8141 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8141) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:52:50,055 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8141 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8141) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:52:50,123 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8141 (_ BitVec 1)) (v_ArrVal_8140 (_ BitVec 1)) (v_nondet_tree_~n~0.base_656 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8140))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_656)) (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_656 v_ArrVal_8141))))) is different from true [2022-11-18 20:52:50,154 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8142 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8142) |c_#valid|)) is different from true [2022-11-18 20:53:06,357 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-18 20:53:06,358 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 38 treesize of output 71 [2022-11-18 20:53:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 195 proven. 20 refuted. 0 times theorem prover too weak. 104 trivial. 43 not checked. [2022-11-18 20:53:06,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467495411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:08,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:08,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2022-11-18 20:53:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481647068] [2022-11-18 20:53:08,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:53:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:53:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=87, Unknown=16, NotChecked=216, Total=380 [2022-11-18 20:53:09,000 INFO L87 Difference]: Start difference. First operand 467 states and 710 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-18 20:53:17,343 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8141 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8141) |c_#valid|) (= (_ 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_7741 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7741) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_8142 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8142) |c_#valid|))) is different from true [2022-11-18 20:53:32,079 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8141 (_ BitVec 1)) (v_ArrVal_8140 (_ BitVec 1)) (v_nondet_tree_~n~0.base_656 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8140))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_656)) (= |c_#valid| (store .cse0 v_nondet_tree_~n~0.base_656 v_ArrVal_8141))))) (exists ((v_ArrVal_7739 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_635 (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_635 v_ArrVal_7739) nondet_tree_~n~0.base (_ bv1 1))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_635))))) is different from true [2022-11-18 20:53:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:54,029 INFO L93 Difference]: Finished difference Result 473 states and 740 transitions. [2022-11-18 20:53:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:53:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) Word has length 91 [2022-11-18 20:53:54,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:54,033 INFO L225 Difference]: With dead ends: 473 [2022-11-18 20:53:54,033 INFO L226 Difference]: Without dead ends: 473 [2022-11-18 20:53:54,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 169 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=111, Invalid=169, Unknown=32, NotChecked=390, Total=702 [2022-11-18 20:53:54,034 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 92 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1998 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:54,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 487 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 236 Invalid, 0 Unknown, 1998 Unchecked, 0.6s Time] [2022-11-18 20:53:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-18 20:53:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 472. [2022-11-18 20:53:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 310 states have (on average 1.2967741935483872) internal successors, (402), 365 states have internal predecessors, (402), 63 states have call successors, (63), 27 states have call predecessors, (63), 48 states have return successors, (275), 79 states have call predecessors, (275), 63 states have call successors, (275) [2022-11-18 20:53:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 740 transitions. [2022-11-18 20:53:54,054 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 740 transitions. Word has length 91 [2022-11-18 20:53:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:54,055 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 740 transitions. [2022-11-18 20:53:54,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (16), 10 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-18 20:53:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 740 transitions. [2022-11-18 20:53:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 20:53:54,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:54,057 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:53:54,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:54,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:54,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:54,471 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:53:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:54,471 INFO L85 PathProgramCache]: Analyzing trace with hash 772853587, now seen corresponding path program 6 times [2022-11-18 20:53:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200832268] [2022-11-18 20:53:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:53:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:54,473 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:53:54,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-18 20:53:55,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-18 20:53:55,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:55,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:53:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:55,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:53:55,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:53:55,869 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_8317 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8317))))) is different from true [2022-11-18 20:53:55,914 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 [2022-11-18 20:53:55,996 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8317 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_677 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_677)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_677 v_ArrVal_8317) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:53:56,114 WARN L859 $PredicateComparison]: unable to prove that (exists ((|nondet_tree_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |nondet_tree_#res.base| (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:53:56,137 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8317 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_677 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_677)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_677 v_ArrVal_8317) nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#res.base| (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:53:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:56,273 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-18 20:53:56,273 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 [2022-11-18 20:53:56,292 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:56,292 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 [2022-11-18 20:53:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 127 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 62 not checked. [2022-11-18 20:53:56,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:58,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200832268] [2022-11-18 20:53:58,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200832268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636003083] [2022-11-18 20:53:58,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:53:58,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:53:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:53:58,291 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:53:58,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-18 20:54:00,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-18 20:54:00,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:54:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:00,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:00,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:03,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:03,879 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 [2022-11-18 20:54:03,924 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (not (= |c_nondet_tree_#t~ret9.base| c_nondet_tree_~n~0.base)) (exists ((v_ArrVal_8484 (_ BitVec 32)) (v_ArrVal_8485 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#length)| c_nondet_tree_~n~0.base v_ArrVal_8484) |nondet_tree_#t~ret8.base| v_ArrVal_8485))) (and (bvule .cse0 (select .cse1 c_nondet_tree_~n~0.base)) (= (store .cse1 |c_nondet_tree_#t~ret9.base| (_ bv12 32)) |c_#length|) (= (select (store |c_old(#valid)| c_nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret8.base|) (_ bv0 1))))) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0))) is different from true [2022-11-18 20:54:03,996 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.offset (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv8 32) nondet_tree_~n~0.offset))) (and (bvule (bvadd (_ bv4 32) nondet_tree_~n~0.offset) .cse0) (bvule (bvadd nondet_tree_~n~0.offset (_ bv12 32)) (select |c_#length| nondet_tree_~n~0.base)) (exists ((v_ArrVal_8484 (_ BitVec 32)) (v_ArrVal_8485 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8484) |nondet_tree_#t~ret8.base| v_ArrVal_8485))) (and (bvule .cse0 (select .cse1 nondet_tree_~n~0.base)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= |c_#length| (store .cse1 |nondet_tree_#t~ret9.base| (_ bv12 32)))))) (not (= nondet_tree_~n~0.base |nondet_tree_#t~ret9.base|))))) is different from true [2022-11-18 20:54:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:04,271 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-18 20:54:04,271 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 2 case distinctions, treesize of input 23 treesize of output 37 [2022-11-18 20:54:04,323 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:04,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-18 20:54:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 139 proven. 50 refuted. 0 times theorem prover too weak. 43 trivial. 16 not checked. [2022-11-18 20:54:06,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:07,889 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-18 20:54:07,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-18 20:54:10,467 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (or (forall ((v_ArrVal_8501 (_ BitVec 32)) (v_nondet_tree_~n~0.base_707 (_ BitVec 32)) (v_nondet_tree_~n~0.base_708 (_ BitVec 32)) (v_nondet_tree_~n~0.base_709 (_ BitVec 32)) (v_ArrVal_8500 (_ BitVec 32)) (v_nondet_tree_~n~0.offset_407 (_ BitVec 32))) (let ((.cse1 (store (store |c_#length| v_nondet_tree_~n~0.base_708 v_ArrVal_8500) v_nondet_tree_~n~0.base_707 v_ArrVal_8501)) (.cse0 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_407))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_708 (_ bv1 1)) v_nondet_tree_~n~0.base_707))) (= v_nondet_tree_~n~0.base_708 v_nondet_tree_~n~0.base_709) (not (bvule .cse0 (select .cse1 v_nondet_tree_~n~0.base_708))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_407 (_ bv12 32)) (select (store .cse1 v_nondet_tree_~n~0.base_709 (_ bv12 32)) v_nondet_tree_~n~0.base_708))) (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_407) .cse0))))) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse2)) (forall ((v_nondet_tree_~n~0.offset_407 (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv8 32) v_nondet_tree_~n~0.offset_407))) (or (forall ((v_nondet_tree_~n~0.base_708 (_ BitVec 32)) (v_nondet_tree_~n~0.base_709 (_ BitVec 32))) (or (= v_nondet_tree_~n~0.base_708 v_nondet_tree_~n~0.base_709) (forall ((v_nondet_tree_~n~0.base_707 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_708 (_ bv1 1)) v_nondet_tree_~n~0.base_707))) (forall ((v_ArrVal_8501 (_ BitVec 32)) (v_ArrVal_8500 (_ BitVec 32))) (let ((.cse4 (store (store |c_#length| v_nondet_tree_~n~0.base_708 v_ArrVal_8500) v_nondet_tree_~n~0.base_707 v_ArrVal_8501))) (let ((.cse5 (store .cse4 v_nondet_tree_~n~0.base_709 (_ bv12 32)))) (or (not (bvule .cse3 (select .cse4 v_nondet_tree_~n~0.base_708))) (not (bvule (bvadd v_nondet_tree_~n~0.offset_407 (_ bv12 32)) (select .cse5 v_nondet_tree_~n~0.base_708))) (bvule .cse2 (select .cse5 c_nondet_tree_~n~0.base)))))))))) (not (bvule (bvadd (_ bv4 32) v_nondet_tree_~n~0.offset_407) .cse3))))))) is different from false [2022-11-18 20:54:10,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636003083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:10,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:10,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2022-11-18 20:54:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795859278] [2022-11-18 20:54:10,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:54:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:54:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=237, Unknown=10, NotChecked=296, Total=600 [2022-11-18 20:54:10,482 INFO L87 Difference]: Start difference. First operand 472 states and 740 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 17 states have internal predecessors, (66), 10 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-18 20:54:17,078 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8317 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_677 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_677)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_677 v_ArrVal_8317) nondet_tree_~n~0.base (_ bv12 32)) |nondet_tree_#res.base| (_ bv12 32)) |c_#length|))) (exists ((nondet_tree_~n~0.offset (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv8 32) nondet_tree_~n~0.offset))) (and (bvule (bvadd (_ bv4 32) nondet_tree_~n~0.offset) .cse0) (bvule (bvadd nondet_tree_~n~0.offset (_ bv12 32)) (select |c_#length| nondet_tree_~n~0.base)) (exists ((v_ArrVal_8484 (_ BitVec 32)) (v_ArrVal_8485 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8484) |nondet_tree_#t~ret8.base| v_ArrVal_8485))) (and (bvule .cse0 (select .cse1 nondet_tree_~n~0.base)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= |c_#length| (store .cse1 |nondet_tree_#t~ret9.base| (_ bv12 32)))))) (not (= nondet_tree_~n~0.base |nondet_tree_#t~ret9.base|)))))) is different from true [2022-11-18 20:54:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:17,687 INFO L93 Difference]: Finished difference Result 474 states and 750 transitions. [2022-11-18 20:54:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:54:17,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 17 states have internal predecessors, (66), 10 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 77 [2022-11-18 20:54:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:17,691 INFO L225 Difference]: With dead ends: 474 [2022-11-18 20:54:17,691 INFO L226 Difference]: Without dead ends: 474 [2022-11-18 20:54:17,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=91, Invalid=436, Unknown=15, NotChecked=450, Total=992 [2022-11-18 20:54:17,692 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2514 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:17,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 579 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 778 Invalid, 0 Unknown, 2514 Unchecked, 2.0s Time] [2022-11-18 20:54:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-18 20:54:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 471. [2022-11-18 20:54:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 309 states have (on average 1.2944983818770226) internal successors, (400), 365 states have internal predecessors, (400), 63 states have call successors, (63), 27 states have call predecessors, (63), 48 states have return successors, (275), 78 states have call predecessors, (275), 63 states have call successors, (275) [2022-11-18 20:54:17,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 738 transitions. [2022-11-18 20:54:17,712 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 738 transitions. Word has length 77 [2022-11-18 20:54:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:17,712 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 738 transitions. [2022-11-18 20:54:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 17 states have internal predecessors, (66), 10 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-18 20:54:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 738 transitions. [2022-11-18 20:54:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-18 20:54:17,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:17,714 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:54:17,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-18 20:54:17,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:18,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:54:18,131 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:54:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash 144765782, now seen corresponding path program 8 times [2022-11-18 20:54:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900221267] [2022-11-18 20:54:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:54:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:18,133 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:54:18,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-18 20:54:19,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:54:19,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:54:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:19,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:19,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:19,216 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8660 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8660))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:19,333 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 [2022-11-18 20:54:19,449 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:19,496 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8660 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32)) (v_nondet_tree_~n~0.base_711 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8660) v_nondet_tree_~n~0.base_711 v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| v_nondet_tree_~n~0.base_711)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:19,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8660 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32)) (v_nondet_tree_~n~0.base_711 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8660) v_nondet_tree_~n~0.base_711 v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv12 32) (select .cse0 v_nondet_tree_~n~0.base_711)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:54:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:19,753 INFO L321 Elim1Store]: treesize reduction 59, result has 34.4 percent of original size [2022-11-18 20:54:19,753 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 30 treesize of output 51 [2022-11-18 20:54:19,781 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:19,781 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 [2022-11-18 20:54:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 26 refuted. 1 times theorem prover too weak. 46 trivial. 74 not checked. [2022-11-18 20:54:19,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:22,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900221267] [2022-11-18 20:54:22,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900221267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:22,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1975979873] [2022-11-18 20:54:22,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:54:22,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:54:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:54:22,558 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:54:22,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-18 20:54:23,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:54:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:54:23,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:24,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-18 20:54:24,121 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8832 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8832))) (exists ((v_ArrVal_8831 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8831))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:24,165 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_8833 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8833))))) is different from true [2022-11-18 20:54:24,206 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8833 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8833)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:24,307 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8833 (_ BitVec 32)) (v_nondet_tree_~n~0.base_731 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_731 v_ArrVal_8833) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_731)))) is different from true [2022-11-18 20:54:24,365 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8831 (_ BitVec 32)) (v_ArrVal_8833 (_ BitVec 32)) (v_nondet_tree_~n~0.base_731 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_732 (_ BitVec 32)) (v_ArrVal_8832 (_ BitVec 1))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_732) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_732 v_ArrVal_8831) v_nondet_tree_~n~0.base_731 v_ArrVal_8833) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_732 v_ArrVal_8832) v_nondet_tree_~n~0.base_731)))) is different from true [2022-11-18 20:54:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:24,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:24,613 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-18 20:54:24,614 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 [2022-11-18 20:54:24,679 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-18 20:54:24,680 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 [2022-11-18 20:54:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 120 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 81 not checked. [2022-11-18 20:54:24,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:32,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1975979873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:32,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:32,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-11-18 20:54:32,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601641229] [2022-11-18 20:54:32,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:32,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:54:32,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:54:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=101, Unknown=20, NotChecked=290, Total=462 [2022-11-18 20:54:32,976 INFO L87 Difference]: Start difference. First operand 471 states and 738 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:54:39,571 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8833 (_ BitVec 32)) (v_nondet_tree_~n~0.base_731 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_731 v_ArrVal_8833) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_731)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:54:39,979 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8831 (_ BitVec 32)) (v_ArrVal_8833 (_ BitVec 32)) (v_nondet_tree_~n~0.base_731 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_732 (_ BitVec 32)) (v_ArrVal_8832 (_ BitVec 1))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_732) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_732 v_ArrVal_8831) v_nondet_tree_~n~0.base_731 v_ArrVal_8833) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_732 v_ArrVal_8832) v_nondet_tree_~n~0.base_731)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8660 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32)) (v_nondet_tree_~n~0.base_711 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8660) v_nondet_tree_~n~0.base_711 v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| v_nondet_tree_~n~0.base_711)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:54:40,081 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8831 (_ BitVec 32)) (v_ArrVal_8833 (_ BitVec 32)) (v_nondet_tree_~n~0.base_731 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_732 (_ BitVec 32)) (v_ArrVal_8832 (_ BitVec 1))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_732) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_732 v_ArrVal_8831) v_nondet_tree_~n~0.base_731 v_ArrVal_8833) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_732 v_ArrVal_8832) v_nondet_tree_~n~0.base_731)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_710 (_ BitVec 32)) (v_ArrVal_8660 (_ BitVec 32)) (v_ArrVal_8661 (_ BitVec 32)) (v_nondet_tree_~n~0.base_711 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8660) v_nondet_tree_~n~0.base_711 v_ArrVal_8661) v_nondet_tree_~n~0.base_710 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv12 32) (select .cse0 v_nondet_tree_~n~0.base_711)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-11-18 20:54:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:40,245 INFO L93 Difference]: Finished difference Result 476 states and 767 transitions. [2022-11-18 20:54:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:54:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) Word has length 79 [2022-11-18 20:54:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:40,250 INFO L225 Difference]: With dead ends: 476 [2022-11-18 20:54:40,250 INFO L226 Difference]: Without dead ends: 476 [2022-11-18 20:54:40,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=81, Invalid=153, Unknown=28, NotChecked=494, Total=756 [2022-11-18 20:54:40,250 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 97 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 2787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2461 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:40,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 336 Invalid, 2787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 2461 Unchecked, 0.8s Time] [2022-11-18 20:54:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-18 20:54:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 475. [2022-11-18 20:54:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 312 states have (on average 1.294871794871795) internal successors, (404), 368 states have internal predecessors, (404), 63 states have call successors, (63), 27 states have call predecessors, (63), 49 states have return successors, (300), 79 states have call predecessors, (300), 63 states have call successors, (300) [2022-11-18 20:54:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 767 transitions. [2022-11-18 20:54:40,278 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 767 transitions. Word has length 79 [2022-11-18 20:54:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:40,279 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 767 transitions. [2022-11-18 20:54:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:54:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 767 transitions. [2022-11-18 20:54:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-18 20:54:40,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:40,282 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:54:40,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:40,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:54:40,701 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-18 20:54:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash -127561902, now seen corresponding path program 7 times [2022-11-18 20:54:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626284891] [2022-11-18 20:54:40,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:54:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:40,703 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:54:40,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-18 20:54:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:41,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:54:41,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:41,590 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 7 [2022-11-18 20:54:41,630 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9005 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9005) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:41,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9006 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9006))) is different from true [2022-11-18 20:54:41,682 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 [2022-11-18 20:54:41,730 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_752 (_ BitVec 32)) (v_ArrVal_9006 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9006) v_nondet_tree_~n~0.base_752 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:54:46,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:54:46,165 INFO L321 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2022-11-18 20:54:46,165 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 5 case distinctions, treesize of input 25 treesize of output 52 [2022-11-18 20:54:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 127 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 46 not checked. [2022-11-18 20:54:46,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:46,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626284891] [2022-11-18 20:54:46,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626284891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:46,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439219317] [2022-11-18 20:54:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:54:46,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:54:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:54:46,533 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:54:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f953c45f-057f-4c1f-981a-c22e75e099ae/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-18 20:54:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:48,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:54:48,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:48,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:54:48,030 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9175 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9175) |c_#valid|)) is different from true [2022-11-18 20:54:48,047 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9176 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9176) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:48,076 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9176 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9176) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:54:54,220 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9175 (_ BitVec 1)) (v_ArrVal_9176 (_ BitVec 1)) (v_nondet_tree_~n~0.base_773 (_ BitVec 32)) (v_nondet_tree_~n~0.base_774 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9175))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_773)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_773 v_ArrVal_9176) v_nondet_tree_~n~0.base_774 (_ bv1 1)))))) is different from true [2022-11-18 20:55:01,095 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9175 (_ BitVec 1)) (v_ArrVal_9176 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_773 (_ BitVec 32)) (v_nondet_tree_~n~0.base_774 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9175))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_773 v_ArrVal_9176) v_nondet_tree_~n~0.base_774 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (select .cse1 v_nondet_tree_~n~0.base_773) (_ bv0 1)) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)))))) is different from true [2022-11-18 20:55:01,271 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-18 20:55:01,271 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 115 treesize of output 148 [2022-11-18 20:55:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 127 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 58 not checked. [2022-11-18 20:55:01,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:01,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439219317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:01,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:01,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2022-11-18 20:55:01,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546207223] [2022-11-18 20:55:01,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:01,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:55:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:55:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=51, Unknown=17, NotChecked=198, Total=306 [2022-11-18 20:55:01,676 INFO L87 Difference]: Start difference. First operand 475 states and 767 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 10 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:55:06,352 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_9176 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9176) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_9006 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9006)))) is different from true