./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:31:34,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:31:34,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:31:34,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:31:34,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:31:34,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:31:34,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:31:34,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:31:34,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:31:34,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:31:34,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:31:34,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:31:34,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:31:34,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:31:34,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:31:34,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:31:34,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:31:34,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:31:34,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:31:34,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:31:34,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:31:34,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:31:34,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:31:34,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:31:34,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:31:34,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:31:34,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:31:34,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:31:34,375 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:31:34,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:31:34,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:31:34,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:31:34,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:31:34,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:31:34,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:31:34,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:31:34,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:31:34,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:31:34,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:31:34,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:31:34,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:31:34,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:31:34,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:31:34,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:31:34,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:31:34,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:31:34,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:31:34,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:31:34,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:31:34,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:31:34,426 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:31:34,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:31:34,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:31:34,427 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:31:34,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:31:34,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:31:34,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:31:34,428 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:31:34,428 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:31:34,429 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:31:34,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:31:34,429 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:31:34,429 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:31:34,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:31:34,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:31:34,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:31:34,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:31:34,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:34,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:31:34,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:31:34,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:31:34,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:31:34,435 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_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-20 10:31:34,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:31:34,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:31:34,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:31:34,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:31:34,802 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:31:34,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 10:31:37,944 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:31:38,176 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:31:38,177 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 10:31:38,184 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/31e2c8186/0a00ce6cb0ab4d44a42d2d6d49e92e9a/FLAG221ab7113 [2022-11-20 10:31:38,199 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/31e2c8186/0a00ce6cb0ab4d44a42d2d6d49e92e9a [2022-11-20 10:31:38,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:31:38,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:31:38,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:38,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:31:38,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:31:38,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:38" (1/1) ... [2022-11-20 10:31:38,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e83ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:38, skipping insertion in model container [2022-11-20 10:31:38,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:38" (1/1) ... [2022-11-20 10:31:38,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:31:38,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:38,405 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 10:31:38,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:38,426 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 10:31:38,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3521a0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:38, skipping insertion in model container [2022-11-20 10:31:38,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:38,427 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 10:31:38,429 INFO L158 Benchmark]: Toolchain (without parser) took 224.64ms. Allocated memory is still 111.1MB. Free memory was 69.2MB in the beginning and 59.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:31:38,430 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:31:38,431 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.09ms. Allocated memory is still 111.1MB. Free memory was 69.1MB in the beginning and 59.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:31:38,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory is still 45.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.09ms. Allocated memory is still 111.1MB. Free memory was 69.1MB in the beginning and 59.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: 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_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:31:40,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:31:40,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:31:40,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:31:40,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:31:40,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:31:40,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:31:40,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:31:40,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:31:40,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:31:40,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:31:40,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:31:40,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:31:40,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:31:40,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:31:40,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:31:40,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:31:40,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:31:40,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:31:40,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:31:40,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:31:40,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:31:40,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:31:40,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:31:40,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:31:40,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:31:40,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:31:40,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:31:40,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:31:40,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:31:40,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:31:40,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:31:40,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:31:40,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:31:40,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:31:40,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:31:40,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:31:40,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:31:40,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:31:40,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:31:40,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:31:40,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 10:31:40,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:31:40,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:31:40,868 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:31:40,868 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:31:40,869 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:31:40,869 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:31:40,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:31:40,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:31:40,870 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:31:40,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:31:40,870 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:31:40,870 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:31:40,871 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:31:40,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:31:40,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:31:40,872 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 10:31:40,872 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 10:31:40,872 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:31:40,873 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:31:40,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:31:40,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:31:40,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:31:40,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:40,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:31:40,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:31:40,874 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 10:31:40,874 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 10:31:40,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 10:31:40,874 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_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-20 10:31:41,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:31:41,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:31:41,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:31:41,302 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:31:41,302 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:31:41,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 10:31:44,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:31:44,567 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:31:44,568 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-20 10:31:44,575 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/17d3e0bf8/4896753f8ee845f1bea06a7b1f3cb0c9/FLAGa82e39bb5 [2022-11-20 10:31:44,594 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/data/17d3e0bf8/4896753f8ee845f1bea06a7b1f3cb0c9 [2022-11-20 10:31:44,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:31:44,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:31:44,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:44,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:31:44,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:31:44,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:44,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7287ce91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44, skipping insertion in model container [2022-11-20 10:31:44,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:44,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:31:44,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:44,814 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 10:31:44,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:44,839 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 10:31:44,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:44,859 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 10:31:44,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:44,868 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:31:44,899 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-20 10:31:44,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:44,919 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:31:44,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44 WrapperNode [2022-11-20 10:31:44,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:44,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:44,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:31:44,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:31:44,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:44,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:44,968 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 198 [2022-11-20 10:31:44,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:44,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:31:44,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:31:44,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:31:44,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:44,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:31:45,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:31:45,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:31:45,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:31:45,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (1/1) ... [2022-11-20 10:31:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:45,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:45,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:31:45,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:31:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:31:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 10:31:45,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 10:31:45,143 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:31:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:31:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:31:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:31:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:31:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:31:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:31:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 10:31:45,147 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:31:45,303 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:31:45,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:31:46,313 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:31:46,325 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:31:46,325 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 10:31:46,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:46 BoogieIcfgContainer [2022-11-20 10:31:46,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:31:46,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:31:46,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:31:46,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:31:46,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:31:44" (1/3) ... [2022-11-20 10:31:46,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66583514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:46, skipping insertion in model container [2022-11-20 10:31:46,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:44" (2/3) ... [2022-11-20 10:31:46,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66583514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:46, skipping insertion in model container [2022-11-20 10:31:46,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:46" (3/3) ... [2022-11-20 10:31:46,353 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-11-20 10:31:46,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:31:46,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-20 10:31:46,376 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:31:46,509 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:31:46,565 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:31:46,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 326 places, 346 transitions, 716 flow [2022-11-20 10:31:46,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 326 places, 346 transitions, 716 flow [2022-11-20 10:31:46,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 346 transitions, 716 flow [2022-11-20 10:31:46,746 INFO L130 PetriNetUnfolder]: 30/343 cut-off events. [2022-11-20 10:31:46,746 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:31:46,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 30/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 464 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 216. Up to 3 conditions per place. [2022-11-20 10:31:46,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2022-11-20 10:33:35,027 INFO L134 LiptonReduction]: Checked pairs total: 7420 [2022-11-20 10:33:35,027 INFO L136 LiptonReduction]: Total number of compositions: 430 [2022-11-20 10:33:35,037 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 76 transitions, 176 flow [2022-11-20 10:33:35,150 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1620 states, 1104 states have (on average 5.486413043478261) internal successors, (6057), 1619 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:35,170 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:33:35,177 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;@490dcf28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:33:35,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-20 10:33:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 1620 states, 1104 states have (on average 5.486413043478261) internal successors, (6057), 1619 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:33:35,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:35,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:33:35,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 42596, now seen corresponding path program 1 times [2022-11-20 10:33:35,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:35,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284114603] [2022-11-20 10:33:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:35,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:35,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:35,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:35,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 10:33:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:35,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:33:35,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:35,645 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:33:35,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:33:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:35,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:35,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284114603] [2022-11-20 10:33:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284114603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:35,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:35,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:33:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026514460] [2022-11-20 10:33:35,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:35,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:33:35,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:33:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:35,731 INFO L87 Difference]: Start difference. First operand has 1620 states, 1104 states have (on average 5.486413043478261) internal successors, (6057), 1619 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:36,504 INFO L93 Difference]: Finished difference Result 1616 states and 6053 transitions. [2022-11-20 10:33:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:36,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:33:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:36,546 INFO L225 Difference]: With dead ends: 1616 [2022-11-20 10:33:36,546 INFO L226 Difference]: Without dead ends: 1616 [2022-11-20 10:33:36,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:36,550 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:36,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:33:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-20 10:33:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1616. [2022-11-20 10:33:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1104 states have (on average 5.482789855072464) internal successors, (6053), 1615 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 6053 transitions. [2022-11-20 10:33:36,737 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 6053 transitions. Word has length 2 [2022-11-20 10:33:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:36,737 INFO L495 AbstractCegarLoop]: Abstraction has 1616 states and 6053 transitions. [2022-11-20 10:33:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 6053 transitions. [2022-11-20 10:33:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:33:36,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:36,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:33:36,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:33:36,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:36,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash 42597, now seen corresponding path program 1 times [2022-11-20 10:33:36,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128659873] [2022-11-20 10:33:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:36,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:36,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:36,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 10:33:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:33:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:37,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:37,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:37,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128659873] [2022-11-20 10:33:37,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128659873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:37,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:37,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:33:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656390156] [2022-11-20 10:33:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:37,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:33:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:33:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:37,306 INFO L87 Difference]: Start difference. First operand 1616 states and 6053 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:38,657 INFO L93 Difference]: Finished difference Result 3228 states and 12102 transitions. [2022-11-20 10:33:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:33:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:38,688 INFO L225 Difference]: With dead ends: 3228 [2022-11-20 10:33:38,689 INFO L226 Difference]: Without dead ends: 3228 [2022-11-20 10:33:38,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:33:38,690 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:38,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 10:33:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2022-11-20 10:33:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 1619. [2022-11-20 10:33:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1107 states have (on average 5.475158084914183) internal successors, (6061), 1618 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6061 transitions. [2022-11-20 10:33:38,803 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6061 transitions. Word has length 2 [2022-11-20 10:33:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:38,804 INFO L495 AbstractCegarLoop]: Abstraction has 1619 states and 6061 transitions. [2022-11-20 10:33:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6061 transitions. [2022-11-20 10:33:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:33:38,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:38,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:33:38,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:39,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1328911, now seen corresponding path program 1 times [2022-11-20 10:33:39,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:39,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571901039] [2022-11-20 10:33:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:39,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:39,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 10:33:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:33:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:39,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:39,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:39,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:39,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571901039] [2022-11-20 10:33:39,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571901039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:39,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:39,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 10:33:39,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214426541] [2022-11-20 10:33:39,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:39,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:33:39,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:33:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:39,697 INFO L87 Difference]: Start difference. First operand 1619 states and 6061 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:43,359 INFO L93 Difference]: Finished difference Result 4846 states and 18167 transitions. [2022-11-20 10:33:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:33:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:43,438 INFO L225 Difference]: With dead ends: 4846 [2022-11-20 10:33:43,438 INFO L226 Difference]: Without dead ends: 4846 [2022-11-20 10:33:43,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:33:43,440 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 475 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:43,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 0 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 10:33:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2022-11-20 10:33:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 1628. [2022-11-20 10:33:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1116 states have (on average 5.452508960573477) internal successors, (6085), 1627 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 6085 transitions. [2022-11-20 10:33:43,653 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 6085 transitions. Word has length 3 [2022-11-20 10:33:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:43,654 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 6085 transitions. [2022-11-20 10:33:43,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:43,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 6085 transitions. [2022-11-20 10:33:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:33:43,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:43,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:33:43,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:43,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash 41302741, now seen corresponding path program 1 times [2022-11-20 10:33:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786279769] [2022-11-20 10:33:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:43,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:43,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:43,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:43,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 10:33:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:33:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:44,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,170 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 10:33:44,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 10:33:44,202 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 10:33:44,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 10:33:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:33:44,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:44,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:33:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:44,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:44,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:44,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786279769] [2022-11-20 10:33:44,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786279769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:44,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:44,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:33:44,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705134305] [2022-11-20 10:33:44,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:44,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:44,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:44,412 INFO L87 Difference]: Start difference. First operand 1628 states and 6085 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:45,105 INFO L93 Difference]: Finished difference Result 1333 states and 4820 transitions. [2022-11-20 10:33:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:45,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:33:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:45,119 INFO L225 Difference]: With dead ends: 1333 [2022-11-20 10:33:45,119 INFO L226 Difference]: Without dead ends: 1333 [2022-11-20 10:33:45,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:45,121 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:45,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 2 Unchecked, 0.7s Time] [2022-11-20 10:33:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-11-20 10:33:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1333. [2022-11-20 10:33:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 947 states have (on average 5.089757127771911) internal successors, (4820), 1332 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4820 transitions. [2022-11-20 10:33:45,186 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4820 transitions. Word has length 4 [2022-11-20 10:33:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:45,186 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 4820 transitions. [2022-11-20 10:33:45,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4820 transitions. [2022-11-20 10:33:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:33:45,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:45,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:33:45,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:45,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:45,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 41302742, now seen corresponding path program 1 times [2022-11-20 10:33:45,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:45,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292246852] [2022-11-20 10:33:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:45,401 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 [2022-11-20 10:33:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:45,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:45,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 10:33:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:33:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:45,657 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 10:33:45,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 10:33:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:46,021 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:33:46,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 10:33:46,443 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 10:33:46,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-20 10:33:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:49,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:49,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:49,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292246852] [2022-11-20 10:33:49,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292246852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:49,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:49,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:49,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027244153] [2022-11-20 10:33:49,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:49,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:49,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:49,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 10:33:49,157 INFO L87 Difference]: Start difference. First operand 1333 states and 4820 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:49,702 INFO L93 Difference]: Finished difference Result 1335 states and 4824 transitions. [2022-11-20 10:33:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:33:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:49,713 INFO L225 Difference]: With dead ends: 1335 [2022-11-20 10:33:49,713 INFO L226 Difference]: Without dead ends: 1335 [2022-11-20 10:33:49,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 10:33:49,715 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:49,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2022-11-20 10:33:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-11-20 10:33:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1335. [2022-11-20 10:33:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 949 states have (on average 5.083245521601686) internal successors, (4824), 1334 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4824 transitions. [2022-11-20 10:33:49,760 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4824 transitions. Word has length 4 [2022-11-20 10:33:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:49,761 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 4824 transitions. [2022-11-20 10:33:49,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4824 transitions. [2022-11-20 10:33:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:33:49,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:49,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:33:49,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:49,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:49,974 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:49,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1277450496, now seen corresponding path program 1 times [2022-11-20 10:33:49,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:49,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771047299] [2022-11-20 10:33:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:49,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:49,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:49,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 10:33:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:33:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:50,264 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 10:33:50,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 10:33:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:50,664 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:33:50,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 10:33:53,026 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 10:33:53,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-20 10:33:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:55,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:55,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:55,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771047299] [2022-11-20 10:33:55,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771047299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:55,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:55,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:55,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138918925] [2022-11-20 10:33:55,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:55,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:55,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:55,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:55,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-20 10:33:55,571 INFO L87 Difference]: Start difference. First operand 1335 states and 4824 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:56,047 INFO L93 Difference]: Finished difference Result 1336 states and 4826 transitions. [2022-11-20 10:33:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:33:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:33:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:56,059 INFO L225 Difference]: With dead ends: 1336 [2022-11-20 10:33:56,059 INFO L226 Difference]: Without dead ends: 1336 [2022-11-20 10:33:56,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=0, Total=20 [2022-11-20 10:33:56,060 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:56,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2022-11-20 10:33:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-11-20 10:33:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1334. [2022-11-20 10:33:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 948 states have (on average 5.086497890295359) internal successors, (4822), 1333 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4822 transitions. [2022-11-20 10:33:56,102 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4822 transitions. Word has length 5 [2022-11-20 10:33:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:56,103 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 4822 transitions. [2022-11-20 10:33:56,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4822 transitions. [2022-11-20 10:33:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:33:56,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:56,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:33:56,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:56,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1280346950, now seen corresponding path program 1 times [2022-11-20 10:33:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:56,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970189512] [2022-11-20 10:33:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:56,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:56,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:56,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 10:33:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:33:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:56,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:56,601 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 10:33:56,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 10:33:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:56,947 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:33:56,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 10:33:57,362 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 10:33:57,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 76 [2022-11-20 10:33:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:57,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:57,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:57,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970189512] [2022-11-20 10:33:57,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970189512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:57,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:57,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:33:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123315604] [2022-11-20 10:33:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:57,841 INFO L87 Difference]: Start difference. First operand 1334 states and 4822 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:58,351 INFO L93 Difference]: Finished difference Result 1341 states and 4837 transitions. [2022-11-20 10:33:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:33:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:33:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:58,361 INFO L225 Difference]: With dead ends: 1341 [2022-11-20 10:33:58,362 INFO L226 Difference]: Without dead ends: 1341 [2022-11-20 10:33:58,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:58,363 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:58,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2022-11-20 10:33:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-11-20 10:33:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1339. [2022-11-20 10:33:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 953 states have (on average 5.071353620146905) internal successors, (4833), 1338 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4833 transitions. [2022-11-20 10:33:58,403 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4833 transitions. Word has length 5 [2022-11-20 10:33:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:58,403 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 4833 transitions. [2022-11-20 10:33:58,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4833 transitions. [2022-11-20 10:33:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:33:58,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:58,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:33:58,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:58,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:58,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1280384398, now seen corresponding path program 1 times [2022-11-20 10:33:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:58,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655656348] [2022-11-20 10:33:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:58,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:58,619 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:58,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 10:33:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:58,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:58,902 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 10:33:58,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 10:33:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:59,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:33:59,058 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:33:59,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:33:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:59,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:59,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655656348] [2022-11-20 10:33:59,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655656348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:59,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:59,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:33:59,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281789532] [2022-11-20 10:33:59,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:59,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:33:59,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:33:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:59,088 INFO L87 Difference]: Start difference. First operand 1339 states and 4833 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:59,677 INFO L93 Difference]: Finished difference Result 1044 states and 3568 transitions. [2022-11-20 10:33:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:33:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:33:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:59,686 INFO L225 Difference]: With dead ends: 1044 [2022-11-20 10:33:59,686 INFO L226 Difference]: Without dead ends: 1044 [2022-11-20 10:33:59,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:33:59,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:59,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 1 Unchecked, 0.6s Time] [2022-11-20 10:33:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-20 10:33:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1038. [2022-11-20 10:33:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 778 states have (on average 4.569408740359897) internal successors, (3555), 1037 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3555 transitions. [2022-11-20 10:33:59,718 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3555 transitions. Word has length 5 [2022-11-20 10:33:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:59,718 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3555 transitions. [2022-11-20 10:33:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3555 transitions. [2022-11-20 10:33:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:33:59,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:59,719 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 10:33:59,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:59,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:33:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 943227109, now seen corresponding path program 2 times [2022-11-20 10:33:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830545948] [2022-11-20 10:33:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:59,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:59,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:59,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 10:34:00,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:00,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:34:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:00,220 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:00,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:00,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:01,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830545948] [2022-11-20 10:34:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830545948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:01,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:01,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:34:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871111896] [2022-11-20 10:34:01,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:34:01,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:34:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:34:01,338 INFO L87 Difference]: Start difference. First operand 1038 states and 3555 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:05,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:07,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:08,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:10,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:13,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:16,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:18,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:21,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:34:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:28,821 INFO L93 Difference]: Finished difference Result 7166 states and 24709 transitions. [2022-11-20 10:34:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:34:28,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:34:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:28,865 INFO L225 Difference]: With dead ends: 7166 [2022-11-20 10:34:28,865 INFO L226 Difference]: Without dead ends: 7166 [2022-11-20 10:34:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:34:28,866 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 990 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 97 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 0 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1764 Invalid, 4 Unknown, 0 Unchecked, 25.8s Time] [2022-11-20 10:34:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7166 states. [2022-11-20 10:34:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7166 to 1052. [2022-11-20 10:34:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 792 states have (on average 4.523989898989899) internal successors, (3583), 1051 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3583 transitions. [2022-11-20 10:34:28,996 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3583 transitions. Word has length 6 [2022-11-20 10:34:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:28,996 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 3583 transitions. [2022-11-20 10:34:28,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3583 transitions. [2022-11-20 10:34:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:34:28,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:28,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:34:29,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:29,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:29,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1037255801, now seen corresponding path program 1 times [2022-11-20 10:34:29,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:29,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573184245] [2022-11-20 10:34:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:29,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:29,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:29,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 10:34:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:34:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:29,524 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 10:34:29,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-20 10:34:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:29,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:29,693 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:34:29,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:29,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:29,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573184245] [2022-11-20 10:34:29,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573184245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:29,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:29,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268097300] [2022-11-20 10:34:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:29,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:29,743 INFO L87 Difference]: Start difference. First operand 1052 states and 3583 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:30,333 INFO L93 Difference]: Finished difference Result 1003 states and 3436 transitions. [2022-11-20 10:34:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:34:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:34:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:30,341 INFO L225 Difference]: With dead ends: 1003 [2022-11-20 10:34:30,341 INFO L226 Difference]: Without dead ends: 1003 [2022-11-20 10:34:30,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:30,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:30,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 1 Unchecked, 0.6s Time] [2022-11-20 10:34:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-20 10:34:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-11-20 10:34:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 773 states have (on average 4.445019404915912) internal successors, (3436), 1002 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3436 transitions. [2022-11-20 10:34:30,371 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3436 transitions. Word has length 6 [2022-11-20 10:34:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:30,372 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 3436 transitions. [2022-11-20 10:34:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3436 transitions. [2022-11-20 10:34:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:34:30,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:30,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:34:30,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:30,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:30,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1037255802, now seen corresponding path program 1 times [2022-11-20 10:34:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490223249] [2022-11-20 10:34:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:30,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:30,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 10:34:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:34:30,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:30,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:30,881 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:34:30,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:34:30,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:34:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:30,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:34:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:30,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:34:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:31,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:31,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490223249] [2022-11-20 10:34:31,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490223249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:31,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:31,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:31,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954623731] [2022-11-20 10:34:31,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:31,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:31,059 INFO L87 Difference]: Start difference. First operand 1003 states and 3436 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:31,748 INFO L93 Difference]: Finished difference Result 954 states and 3289 transitions. [2022-11-20 10:34:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:34:31,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:34:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:31,758 INFO L225 Difference]: With dead ends: 954 [2022-11-20 10:34:31,758 INFO L226 Difference]: Without dead ends: 954 [2022-11-20 10:34:31,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:31,763 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:31,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 2 Unchecked, 0.7s Time] [2022-11-20 10:34:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-20 10:34:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 954. [2022-11-20 10:34:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 754 states have (on average 4.362068965517241) internal successors, (3289), 953 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3289 transitions. [2022-11-20 10:34:31,797 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3289 transitions. Word has length 6 [2022-11-20 10:34:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:31,797 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 3289 transitions. [2022-11-20 10:34:31,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3289 transitions. [2022-11-20 10:34:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:34:31,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:31,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:34:31,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:32,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1037255738, now seen corresponding path program 1 times [2022-11-20 10:34:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:32,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829748272] [2022-11-20 10:34:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:32,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:32,014 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:32,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 10:34:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:32,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:34:32,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:32,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:32,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:32,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829748272] [2022-11-20 10:34:32,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829748272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:32,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:32,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778520543] [2022-11-20 10:34:32,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:32,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:32,205 INFO L87 Difference]: Start difference. First operand 954 states and 3289 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:33,310 INFO L93 Difference]: Finished difference Result 1321 states and 4332 transitions. [2022-11-20 10:34:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:34:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:33,321 INFO L225 Difference]: With dead ends: 1321 [2022-11-20 10:34:33,322 INFO L226 Difference]: Without dead ends: 1321 [2022-11-20 10:34:33,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:33,323 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:33,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:34:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-11-20 10:34:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1124. [2022-11-20 10:34:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 924 states have (on average 4.264069264069264) internal successors, (3940), 1123 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3940 transitions. [2022-11-20 10:34:33,370 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3940 transitions. Word has length 6 [2022-11-20 10:34:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:33,371 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 3940 transitions. [2022-11-20 10:34:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3940 transitions. [2022-11-20 10:34:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:34:33,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:33,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:33,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:33,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:33,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:33,586 INFO L85 PathProgramCache]: Analyzing trace with hash -730693660, now seen corresponding path program 1 times [2022-11-20 10:34:33,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:33,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434844708] [2022-11-20 10:34:33,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:33,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:33,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:33,588 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:33,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 10:34:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:34:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:33,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:33,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434844708] [2022-11-20 10:34:33,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434844708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:33,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:33,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890448618] [2022-11-20 10:34:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:33,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:33,849 INFO L87 Difference]: Start difference. First operand 1124 states and 3940 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:35,378 INFO L93 Difference]: Finished difference Result 2560 states and 8818 transitions. [2022-11-20 10:34:35,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:34:35,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:34:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:35,389 INFO L225 Difference]: With dead ends: 2560 [2022-11-20 10:34:35,389 INFO L226 Difference]: Without dead ends: 2560 [2022-11-20 10:34:35,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:35,390 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:35,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 10:34:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-11-20 10:34:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1124. [2022-11-20 10:34:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 924 states have (on average 4.264069264069264) internal successors, (3940), 1123 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3940 transitions. [2022-11-20 10:34:35,444 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3940 transitions. Word has length 7 [2022-11-20 10:34:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:35,444 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 3940 transitions. [2022-11-20 10:34:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3940 transitions. [2022-11-20 10:34:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:35,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:35,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:35,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:35,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1214025152, now seen corresponding path program 1 times [2022-11-20 10:34:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600876682] [2022-11-20 10:34:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:35,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:35,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:35,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 10:34:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:35,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:34:35,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:34:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:36,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:34:36,124 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:34:36,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:34:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:36,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:36,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:34:36,878 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 55 treesize of output 62 [2022-11-20 10:34:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:37,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600876682] [2022-11-20 10:34:37,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600876682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:37,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:37,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028827273] [2022-11-20 10:34:37,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:37,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:37,156 INFO L87 Difference]: Start difference. First operand 1124 states and 3940 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:40,616 INFO L93 Difference]: Finished difference Result 3458 states and 12790 transitions. [2022-11-20 10:34:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:34:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:40,627 INFO L225 Difference]: With dead ends: 3458 [2022-11-20 10:34:40,627 INFO L226 Difference]: Without dead ends: 3458 [2022-11-20 10:34:40,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:34:40,627 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 404 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:40,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 0 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 432 Unchecked, 1.2s Time] [2022-11-20 10:34:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2022-11-20 10:34:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 1127. [2022-11-20 10:34:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 927 states have (on average 4.2599784250269686) internal successors, (3949), 1126 states have internal predecessors, (3949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3949 transitions. [2022-11-20 10:34:40,690 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3949 transitions. Word has length 8 [2022-11-20 10:34:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:40,690 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3949 transitions. [2022-11-20 10:34:40,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3949 transitions. [2022-11-20 10:34:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:40,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:40,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:40,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:40,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:40,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1214025151, now seen corresponding path program 1 times [2022-11-20 10:34:40,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:40,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988416317] [2022-11-20 10:34:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:40,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:40,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 10:34:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:34:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:41,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:34:41,159 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:34:41,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:34:41,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:41,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988416317] [2022-11-20 10:34:41,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988416317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:41,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:41,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:41,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956581332] [2022-11-20 10:34:41,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:41,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:41,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:41,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:41,183 INFO L87 Difference]: Start difference. First operand 1127 states and 3949 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:41,767 INFO L93 Difference]: Finished difference Result 887 states and 3107 transitions. [2022-11-20 10:34:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:41,769 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:41,772 INFO L225 Difference]: With dead ends: 887 [2022-11-20 10:34:41,772 INFO L226 Difference]: Without dead ends: 887 [2022-11-20 10:34:41,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:41,775 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:41,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:34:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-20 10:34:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 887. [2022-11-20 10:34:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 752 states have (on average 4.131648936170213) internal successors, (3107), 886 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3107 transitions. [2022-11-20 10:34:41,804 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3107 transitions. Word has length 8 [2022-11-20 10:34:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:41,804 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 3107 transitions. [2022-11-20 10:34:41,805 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3107 transitions. [2022-11-20 10:34:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:41,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:41,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:41,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:42,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:42,024 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1214025272, now seen corresponding path program 1 times [2022-11-20 10:34:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656423289] [2022-11-20 10:34:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:42,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:42,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:42,025 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:42,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 10:34:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:34:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:42,375 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:34:42,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:34:42,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:34:42,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:34:42,457 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:34:42,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:34:42,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:42,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:42,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656423289] [2022-11-20 10:34:42,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656423289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:42,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:42,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727521033] [2022-11-20 10:34:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:42,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:42,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:42,480 INFO L87 Difference]: Start difference. First operand 887 states and 3107 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:43,100 INFO L93 Difference]: Finished difference Result 699 states and 2423 transitions. [2022-11-20 10:34:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:43,104 INFO L225 Difference]: With dead ends: 699 [2022-11-20 10:34:43,104 INFO L226 Difference]: Without dead ends: 699 [2022-11-20 10:34:43,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:43,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:43,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:34:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-20 10:34:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 699. [2022-11-20 10:34:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 608 states have (on average 3.9851973684210527) internal successors, (2423), 698 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2423 transitions. [2022-11-20 10:34:43,125 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2423 transitions. Word has length 8 [2022-11-20 10:34:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 2423 transitions. [2022-11-20 10:34:43,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2423 transitions. [2022-11-20 10:34:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:43,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:43,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:43,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:43,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:43,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1214025271, now seen corresponding path program 1 times [2022-11-20 10:34:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504143826] [2022-11-20 10:34:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:43,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:43,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 10:34:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:34:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:43,757 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:43,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:43,919 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:34:43,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:34:44,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:34:44,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:34:44,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:34:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:44,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:34:44,211 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:34:44,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:34:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:55,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504143826] [2022-11-20 10:34:55,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504143826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:55,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:55,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774298629] [2022-11-20 10:34:55,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:55,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-11-20 10:34:55,229 INFO L87 Difference]: Start difference. First operand 699 states and 2423 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:56,255 INFO L93 Difference]: Finished difference Result 824 states and 2714 transitions. [2022-11-20 10:34:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:34:56,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:56,259 INFO L225 Difference]: With dead ends: 824 [2022-11-20 10:34:56,259 INFO L226 Difference]: Without dead ends: 824 [2022-11-20 10:34:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-11-20 10:34:56,260 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:56,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 236 Unchecked, 1.0s Time] [2022-11-20 10:34:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-20 10:34:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 715. [2022-11-20 10:34:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 624 states have (on average 3.9375) internal successors, (2457), 714 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2457 transitions. [2022-11-20 10:34:56,281 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2457 transitions. Word has length 8 [2022-11-20 10:34:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:56,281 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 2457 transitions. [2022-11-20 10:34:56,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2457 transitions. [2022-11-20 10:34:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:56,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:56,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:56,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:34:56,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:56,495 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:56,496 INFO L85 PathProgramCache]: Analyzing trace with hash 370439583, now seen corresponding path program 1 times [2022-11-20 10:34:56,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77487207] [2022-11-20 10:34:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:56,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:56,498 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:56,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 10:34:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:34:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:56,790 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:34:56,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:34:56,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:56,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:56,899 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:34:56,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:34:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:56,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:56,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77487207] [2022-11-20 10:34:56,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77487207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:56,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:56,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:34:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497947217] [2022-11-20 10:34:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:34:56,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:34:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:34:56,959 INFO L87 Difference]: Start difference. First operand 715 states and 2457 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:57,577 INFO L93 Difference]: Finished difference Result 720 states and 2472 transitions. [2022-11-20 10:34:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:34:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:57,581 INFO L225 Difference]: With dead ends: 720 [2022-11-20 10:34:57,581 INFO L226 Difference]: Without dead ends: 720 [2022-11-20 10:34:57,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:57,581 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:57,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 51 Unchecked, 0.6s Time] [2022-11-20 10:34:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-20 10:34:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-11-20 10:34:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 629 states have (on average 3.930047694753577) internal successors, (2472), 719 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2472 transitions. [2022-11-20 10:34:57,600 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2472 transitions. Word has length 8 [2022-11-20 10:34:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:57,601 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 2472 transitions. [2022-11-20 10:34:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2472 transitions. [2022-11-20 10:34:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:57,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:57,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:57,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:57,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:57,803 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash 370439584, now seen corresponding path program 1 times [2022-11-20 10:34:57,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:57,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769120124] [2022-11-20 10:34:57,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:57,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:57,805 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 10:34:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:34:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:58,129 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 10:34:58,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-20 10:34:58,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 143 [2022-11-20 10:34:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:34:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:34:58,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:34:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:58,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:58,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769120124] [2022-11-20 10:34:58,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769120124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:58,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:58,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922788774] [2022-11-20 10:34:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:58,351 INFO L87 Difference]: Start difference. First operand 720 states and 2472 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:58,957 INFO L93 Difference]: Finished difference Result 679 states and 2336 transitions. [2022-11-20 10:34:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:34:58,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:34:58,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:58,960 INFO L225 Difference]: With dead ends: 679 [2022-11-20 10:34:58,960 INFO L226 Difference]: Without dead ends: 679 [2022-11-20 10:34:58,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:58,961 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 133 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:58,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 4 Unchecked, 0.6s Time] [2022-11-20 10:34:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-11-20 10:34:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2022-11-20 10:34:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 604 states have (on average 3.8675496688741724) internal successors, (2336), 678 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2336 transitions. [2022-11-20 10:34:58,977 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2336 transitions. Word has length 8 [2022-11-20 10:34:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:58,978 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 2336 transitions. [2022-11-20 10:34:58,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2336 transitions. [2022-11-20 10:34:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:34:58,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:58,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:58,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:34:59,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:59,190 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:34:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 370439410, now seen corresponding path program 1 times [2022-11-20 10:34:59,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:59,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452044755] [2022-11-20 10:34:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:59,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:59,193 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:59,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 10:34:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:34:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:59,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:59,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:59,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452044755] [2022-11-20 10:34:59,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452044755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:59,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:59,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:59,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719029485] [2022-11-20 10:34:59,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:59,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:59,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:59,438 INFO L87 Difference]: Start difference. First operand 679 states and 2336 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:00,962 INFO L93 Difference]: Finished difference Result 1371 states and 4714 transitions. [2022-11-20 10:35:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:35:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:00,967 INFO L225 Difference]: With dead ends: 1371 [2022-11-20 10:35:00,967 INFO L226 Difference]: Without dead ends: 1371 [2022-11-20 10:35:00,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:00,968 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:00,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 10:35:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-11-20 10:35:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 748. [2022-11-20 10:35:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 673 states have (on average 3.7592867756315007) internal successors, (2530), 747 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2530 transitions. [2022-11-20 10:35:00,998 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2530 transitions. Word has length 8 [2022-11-20 10:35:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:00,999 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2530 transitions. [2022-11-20 10:35:00,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2530 transitions. [2022-11-20 10:35:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:00,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:00,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:01,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:01,200 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1019929011, now seen corresponding path program 1 times [2022-11-20 10:35:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:01,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105229537] [2022-11-20 10:35:01,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:01,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:01,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:01,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 10:35:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:35:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:01,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:35:01,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:35:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:01,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:01,630 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:01,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:01,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:04,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:35:04,313 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 55 treesize of output 62 [2022-11-20 10:35:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:04,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:04,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105229537] [2022-11-20 10:35:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105229537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:04,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:04,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640233321] [2022-11-20 10:35:04,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:04,544 INFO L87 Difference]: Start difference. First operand 748 states and 2530 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:10,034 INFO L93 Difference]: Finished difference Result 2143 states and 7390 transitions. [2022-11-20 10:35:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:35:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:10,041 INFO L225 Difference]: With dead ends: 2143 [2022-11-20 10:35:10,041 INFO L226 Difference]: Without dead ends: 2143 [2022-11-20 10:35:10,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:35:10,041 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:10,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 491 Invalid, 0 Unknown, 286 Unchecked, 3.3s Time] [2022-11-20 10:35:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2022-11-20 10:35:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 784. [2022-11-20 10:35:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 709 states have (on average 3.8307475317348376) internal successors, (2716), 783 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2716 transitions. [2022-11-20 10:35:10,069 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2716 transitions. Word has length 9 [2022-11-20 10:35:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:10,074 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 2716 transitions. [2022-11-20 10:35:10,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2716 transitions. [2022-11-20 10:35:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:10,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:10,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:10,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:10,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:10,280 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1019928892, now seen corresponding path program 1 times [2022-11-20 10:35:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628307806] [2022-11-20 10:35:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:10,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:10,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:10,282 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:10,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 10:35:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:35:10,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:10,707 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:35:10,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:35:10,874 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:35:10,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:35:11,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:35:11,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:35:11,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:11,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:11,177 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:11,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:14,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628307806] [2022-11-20 10:35:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628307806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:14,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:14,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287431080] [2022-11-20 10:35:14,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:14,321 INFO L87 Difference]: Start difference. First operand 784 states and 2716 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:15,866 INFO L93 Difference]: Finished difference Result 989 states and 3194 transitions. [2022-11-20 10:35:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:35:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:15,871 INFO L225 Difference]: With dead ends: 989 [2022-11-20 10:35:15,871 INFO L226 Difference]: Without dead ends: 989 [2022-11-20 10:35:15,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:35:15,872 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:15,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 292 Unchecked, 1.4s Time] [2022-11-20 10:35:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-11-20 10:35:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 786. [2022-11-20 10:35:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 711 states have (on average 3.8298171589310828) internal successors, (2723), 785 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2723 transitions. [2022-11-20 10:35:15,894 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2723 transitions. Word has length 9 [2022-11-20 10:35:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:15,894 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 2723 transitions. [2022-11-20 10:35:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2723 transitions. [2022-11-20 10:35:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:15,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:15,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:15,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-20 10:35:16,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:16,108 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1018555308, now seen corresponding path program 1 times [2022-11-20 10:35:16,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530477805] [2022-11-20 10:35:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:16,110 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:16,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 10:35:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:35:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:16,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:35:16,381 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 [2022-11-20 10:35:16,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:16,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:16,498 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:16,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:35:16,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:19,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:35:19,183 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 55 treesize of output 62 [2022-11-20 10:35:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:35:19,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:19,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530477805] [2022-11-20 10:35:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530477805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:19,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:19,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:19,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645051925] [2022-11-20 10:35:19,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:19,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:19,434 INFO L87 Difference]: Start difference. First operand 786 states and 2723 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:22,893 INFO L93 Difference]: Finished difference Result 2334 states and 8010 transitions. [2022-11-20 10:35:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:35:22,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:22,901 INFO L225 Difference]: With dead ends: 2334 [2022-11-20 10:35:22,901 INFO L226 Difference]: Without dead ends: 2334 [2022-11-20 10:35:22,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:35:22,902 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:22,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 352 Unchecked, 3.0s Time] [2022-11-20 10:35:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2022-11-20 10:35:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 796. [2022-11-20 10:35:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 721 states have (on average 3.8058252427184467) internal successors, (2744), 795 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2744 transitions. [2022-11-20 10:35:22,946 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2744 transitions. Word has length 9 [2022-11-20 10:35:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:22,946 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 2744 transitions. [2022-11-20 10:35:22,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2744 transitions. [2022-11-20 10:35:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:22,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:22,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:22,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:23,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:23,148 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:23,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1018555189, now seen corresponding path program 1 times [2022-11-20 10:35:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:23,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473992] [2022-11-20 10:35:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:23,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:23,151 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:23,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 10:35:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:35:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:23,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:35:23,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:35:23,764 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:35:23,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:35:23,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:23,926 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 16 treesize of output 18 [2022-11-20 10:35:23,956 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:23,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:24,184 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-20 10:35:24,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 36 [2022-11-20 10:35:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:24,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:27,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473992] [2022-11-20 10:35:27,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:27,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:27,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:35:27,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155190555] [2022-11-20 10:35:27,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:35:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:35:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:35:27,658 INFO L87 Difference]: Start difference. First operand 796 states and 2744 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:29,976 INFO L93 Difference]: Finished difference Result 1233 states and 4143 transitions. [2022-11-20 10:35:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:35:29,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:29,983 INFO L225 Difference]: With dead ends: 1233 [2022-11-20 10:35:29,983 INFO L226 Difference]: Without dead ends: 1233 [2022-11-20 10:35:29,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:35:29,984 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:29,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 185 Invalid, 0 Unknown, 171 Unchecked, 2.1s Time] [2022-11-20 10:35:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-20 10:35:30,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 806. [2022-11-20 10:35:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 731 states have (on average 3.781121751025992) internal successors, (2764), 805 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2764 transitions. [2022-11-20 10:35:30,021 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2764 transitions. Word has length 9 [2022-11-20 10:35:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:30,022 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 2764 transitions. [2022-11-20 10:35:30,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2764 transitions. [2022-11-20 10:35:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:30,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:30,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:30,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:30,223 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1349586447, now seen corresponding path program 1 times [2022-11-20 10:35:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374221193] [2022-11-20 10:35:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:30,226 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:30,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 10:35:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:35:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:30,501 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:30,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:30,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:30,603 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:30,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:30,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:30,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374221193] [2022-11-20 10:35:30,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374221193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:30,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:30,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:30,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856379155] [2022-11-20 10:35:30,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:30,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:30,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:30,670 INFO L87 Difference]: Start difference. First operand 806 states and 2764 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:31,155 INFO L93 Difference]: Finished difference Result 814 states and 2797 transitions. [2022-11-20 10:35:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:31,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:31,158 INFO L225 Difference]: With dead ends: 814 [2022-11-20 10:35:31,158 INFO L226 Difference]: Without dead ends: 814 [2022-11-20 10:35:31,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:31,159 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:31,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-20 10:35:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-20 10:35:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2022-11-20 10:35:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 739 states have (on average 3.784844384303112) internal successors, (2797), 813 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2797 transitions. [2022-11-20 10:35:31,179 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2797 transitions. Word has length 9 [2022-11-20 10:35:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:31,179 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 2797 transitions. [2022-11-20 10:35:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2797 transitions. [2022-11-20 10:35:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:31,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:31,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:31,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:31,393 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1349586274, now seen corresponding path program 1 times [2022-11-20 10:35:31,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:31,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457756443] [2022-11-20 10:35:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:31,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:31,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:31,394 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:31,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 10:35:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:35:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:31,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:31,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457756443] [2022-11-20 10:35:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457756443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:31,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:35:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300438022] [2022-11-20 10:35:31,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:35:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:35:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:31,648 INFO L87 Difference]: Start difference. First operand 814 states and 2797 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:33,101 INFO L93 Difference]: Finished difference Result 1753 states and 6055 transitions. [2022-11-20 10:35:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:33,107 INFO L225 Difference]: With dead ends: 1753 [2022-11-20 10:35:33,107 INFO L226 Difference]: Without dead ends: 1753 [2022-11-20 10:35:33,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:35:33,108 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:33,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 10:35:33,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-11-20 10:35:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 935. [2022-11-20 10:35:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 860 states have (on average 3.7825581395348835) internal successors, (3253), 934 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3253 transitions. [2022-11-20 10:35:33,133 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3253 transitions. Word has length 9 [2022-11-20 10:35:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:33,134 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 3253 transitions. [2022-11-20 10:35:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3253 transitions. [2022-11-20 10:35:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:33,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:33,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:33,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:33,335 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1404849056, now seen corresponding path program 1 times [2022-11-20 10:35:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924754345] [2022-11-20 10:35:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:33,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:33,337 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 10:35:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:35:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:33,652 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:33,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:33,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:33,739 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:33,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:33,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:33,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:33,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924754345] [2022-11-20 10:35:33,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924754345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:33,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:33,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011144417] [2022-11-20 10:35:33,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:33,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:33,822 INFO L87 Difference]: Start difference. First operand 935 states and 3253 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:34,456 INFO L93 Difference]: Finished difference Result 942 states and 3265 transitions. [2022-11-20 10:35:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:34,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:34,462 INFO L225 Difference]: With dead ends: 942 [2022-11-20 10:35:34,462 INFO L226 Difference]: Without dead ends: 942 [2022-11-20 10:35:34,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:34,463 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:34,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-11-20 10:35:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-20 10:35:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2022-11-20 10:35:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 867 states have (on average 3.7658592848904267) internal successors, (3265), 941 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 3265 transitions. [2022-11-20 10:35:34,484 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 3265 transitions. Word has length 9 [2022-11-20 10:35:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:34,485 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 3265 transitions. [2022-11-20 10:35:34,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 3265 transitions. [2022-11-20 10:35:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:34,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:34,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:34,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:34,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:34,687 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1401276988, now seen corresponding path program 1 times [2022-11-20 10:35:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:34,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420433083] [2022-11-20 10:35:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:34,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:34,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:34,689 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:34,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 10:35:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:34,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:35:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:34,972 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:34,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:35,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:35,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:35,061 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:35,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:35,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:35,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:35,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420433083] [2022-11-20 10:35:35,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420433083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:35,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:35,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566166865] [2022-11-20 10:35:35,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:35,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:35,131 INFO L87 Difference]: Start difference. First operand 942 states and 3265 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:35,689 INFO L93 Difference]: Finished difference Result 943 states and 3267 transitions. [2022-11-20 10:35:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:35,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:35,694 INFO L225 Difference]: With dead ends: 943 [2022-11-20 10:35:35,694 INFO L226 Difference]: Without dead ends: 943 [2022-11-20 10:35:35,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:35,694 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:35,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-20 10:35:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-11-20 10:35:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 943. [2022-11-20 10:35:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 868 states have (on average 3.763824884792627) internal successors, (3267), 942 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3267 transitions. [2022-11-20 10:35:35,710 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3267 transitions. Word has length 9 [2022-11-20 10:35:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:35,710 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 3267 transitions. [2022-11-20 10:35:35,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3267 transitions. [2022-11-20 10:35:35,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:35:35,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:35,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:35,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:35,911 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1573862487, now seen corresponding path program 1 times [2022-11-20 10:35:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107919803] [2022-11-20 10:35:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:35,913 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:35,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 10:35:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:35:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:36,199 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:36,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:36,300 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:36,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:36,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:36,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:36,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107919803] [2022-11-20 10:35:36,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107919803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:36,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:36,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442472155] [2022-11-20 10:35:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:36,372 INFO L87 Difference]: Start difference. First operand 943 states and 3267 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:36,916 INFO L93 Difference]: Finished difference Result 942 states and 3264 transitions. [2022-11-20 10:35:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:35:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:36,921 INFO L225 Difference]: With dead ends: 942 [2022-11-20 10:35:36,921 INFO L226 Difference]: Without dead ends: 942 [2022-11-20 10:35:36,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:36,922 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:36,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-20 10:35:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-20 10:35:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 938. [2022-11-20 10:35:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 863 states have (on average 3.772885283893395) internal successors, (3256), 937 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3256 transitions. [2022-11-20 10:35:36,946 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3256 transitions. Word has length 9 [2022-11-20 10:35:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 3256 transitions. [2022-11-20 10:35:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3256 transitions. [2022-11-20 10:35:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:36,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:36,948 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:36,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:37,161 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 797087497, now seen corresponding path program 2 times [2022-11-20 10:35:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509168696] [2022-11-20 10:35:37,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:35:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:37,163 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:37,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 10:35:37,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:35:37,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:35:37,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:37,476 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:35:37,477 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:35:37,624 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:35:37,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:35:37,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:35:37,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:35:37,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:37,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:37,899 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:37,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:35:37,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:37,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:37,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509168696] [2022-11-20 10:35:37,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509168696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:37,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:37,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:35:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604172035] [2022-11-20 10:35:37,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:35:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:35:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:37,965 INFO L87 Difference]: Start difference. First operand 938 states and 3256 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:39,158 INFO L93 Difference]: Finished difference Result 1497 states and 5285 transitions. [2022-11-20 10:35:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:35:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:39,164 INFO L225 Difference]: With dead ends: 1497 [2022-11-20 10:35:39,164 INFO L226 Difference]: Without dead ends: 1497 [2022-11-20 10:35:39,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:39,165 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:39,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:35:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-20 10:35:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1105. [2022-11-20 10:35:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1030 states have (on average 4.0718446601941745) internal successors, (4194), 1104 states have internal predecessors, (4194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4194 transitions. [2022-11-20 10:35:39,187 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4194 transitions. Word has length 10 [2022-11-20 10:35:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 4194 transitions. [2022-11-20 10:35:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4194 transitions. [2022-11-20 10:35:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:39,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:39,188 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:39,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:39,395 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash 357471936, now seen corresponding path program 2 times [2022-11-20 10:35:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:39,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693666975] [2022-11-20 10:35:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:35:39,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:39,397 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:39,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 10:35:39,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:35:39,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:35:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:39,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:35:39,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:35:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:39,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:39,749 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:39,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:35:39,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:39,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693666975] [2022-11-20 10:35:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693666975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:39,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:35:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133074171] [2022-11-20 10:35:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:39,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:35:39,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:35:39,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:39,821 INFO L87 Difference]: Start difference. First operand 1105 states and 4194 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:40,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:40,995 INFO L93 Difference]: Finished difference Result 1311 states and 4616 transitions. [2022-11-20 10:35:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:41,001 INFO L225 Difference]: With dead ends: 1311 [2022-11-20 10:35:41,001 INFO L226 Difference]: Without dead ends: 1311 [2022-11-20 10:35:41,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:41,002 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:41,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:35:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-20 10:35:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1028. [2022-11-20 10:35:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 953 states have (on average 3.97691500524659) internal successors, (3790), 1027 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3790 transitions. [2022-11-20 10:35:41,038 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3790 transitions. Word has length 10 [2022-11-20 10:35:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:41,039 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 3790 transitions. [2022-11-20 10:35:41,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:41,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3790 transitions. [2022-11-20 10:35:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:41,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:41,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:41,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:41,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:41,243 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1552856922, now seen corresponding path program 1 times [2022-11-20 10:35:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:41,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144828366] [2022-11-20 10:35:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:41,245 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 10:35:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:35:41,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:41,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:41,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:41,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144828366] [2022-11-20 10:35:41,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144828366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:41,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:41,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:41,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484506422] [2022-11-20 10:35:41,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:41,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:41,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:41,789 INFO L87 Difference]: Start difference. First operand 1028 states and 3790 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:45,271 INFO L93 Difference]: Finished difference Result 2257 states and 7444 transitions. [2022-11-20 10:35:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:35:45,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:45,280 INFO L225 Difference]: With dead ends: 2257 [2022-11-20 10:35:45,280 INFO L226 Difference]: Without dead ends: 2257 [2022-11-20 10:35:45,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:35:45,281 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 337 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:45,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 0 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 10:35:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2022-11-20 10:35:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1253. [2022-11-20 10:35:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1178 states have (on average 4.022071307300509) internal successors, (4738), 1252 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4738 transitions. [2022-11-20 10:35:45,312 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4738 transitions. Word has length 10 [2022-11-20 10:35:45,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:45,312 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 4738 transitions. [2022-11-20 10:35:45,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:45,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4738 transitions. [2022-11-20 10:35:45,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:45,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:45,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:45,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-20 10:35:45,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:45,514 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:45,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1116067344, now seen corresponding path program 1 times [2022-11-20 10:35:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:45,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823947073] [2022-11-20 10:35:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:45,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:45,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:45,517 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:45,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 10:35:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:35:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:45,845 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:45,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:45,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:45,951 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:45,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:46,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:46,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:46,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823947073] [2022-11-20 10:35:46,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823947073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:46,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:46,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:46,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818810106] [2022-11-20 10:35:46,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:46,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:46,031 INFO L87 Difference]: Start difference. First operand 1253 states and 4738 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:46,602 INFO L93 Difference]: Finished difference Result 1260 states and 4750 transitions. [2022-11-20 10:35:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:46,607 INFO L225 Difference]: With dead ends: 1260 [2022-11-20 10:35:46,607 INFO L226 Difference]: Without dead ends: 1260 [2022-11-20 10:35:46,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:46,608 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:46,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-20 10:35:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-11-20 10:35:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1257. [2022-11-20 10:35:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1182 states have (on average 4.0152284263959395) internal successors, (4746), 1256 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 4746 transitions. [2022-11-20 10:35:46,645 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 4746 transitions. Word has length 10 [2022-11-20 10:35:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:46,646 INFO L495 AbstractCegarLoop]: Abstraction has 1257 states and 4746 transitions. [2022-11-20 10:35:46,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 4746 transitions. [2022-11-20 10:35:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:46,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:46,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:46,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:46,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:46,847 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1112495276, now seen corresponding path program 1 times [2022-11-20 10:35:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289834562] [2022-11-20 10:35:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:46,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:46,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:46,849 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:46,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 10:35:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:35:47,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:47,152 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:47,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:47,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:47,252 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:47,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:47,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:47,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:47,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289834562] [2022-11-20 10:35:47,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289834562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:47,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:47,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:47,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145449169] [2022-11-20 10:35:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:47,326 INFO L87 Difference]: Start difference. First operand 1257 states and 4746 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:47,939 INFO L93 Difference]: Finished difference Result 1258 states and 4746 transitions. [2022-11-20 10:35:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:47,944 INFO L225 Difference]: With dead ends: 1258 [2022-11-20 10:35:47,944 INFO L226 Difference]: Without dead ends: 1258 [2022-11-20 10:35:47,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:47,944 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:47,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-11-20 10:35:47,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-11-20 10:35:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1253. [2022-11-20 10:35:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1178 states have (on average 4.020373514431239) internal successors, (4736), 1252 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4736 transitions. [2022-11-20 10:35:47,964 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4736 transitions. Word has length 10 [2022-11-20 10:35:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:47,965 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 4736 transitions. [2022-11-20 10:35:47,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4736 transitions. [2022-11-20 10:35:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:47,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:47,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:47,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:48,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:48,168 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1862644199, now seen corresponding path program 1 times [2022-11-20 10:35:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:48,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178093618] [2022-11-20 10:35:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:48,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:48,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:48,170 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:48,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 10:35:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:35:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:48,498 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:35:48,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:35:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:48,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:48,612 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:35:48,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:35:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:35:48,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:48,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178093618] [2022-11-20 10:35:48,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178093618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:48,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:48,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:48,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177731079] [2022-11-20 10:35:48,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:48,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:48,687 INFO L87 Difference]: Start difference. First operand 1253 states and 4736 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:49,144 INFO L93 Difference]: Finished difference Result 1258 states and 4763 transitions. [2022-11-20 10:35:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:35:49,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:49,148 INFO L225 Difference]: With dead ends: 1258 [2022-11-20 10:35:49,149 INFO L226 Difference]: Without dead ends: 1258 [2022-11-20 10:35:49,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:49,149 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:49,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 10:35:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-11-20 10:35:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1258. [2022-11-20 10:35:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1183 states have (on average 4.026204564666103) internal successors, (4763), 1257 states have internal predecessors, (4763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4763 transitions. [2022-11-20 10:35:49,168 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4763 transitions. Word has length 10 [2022-11-20 10:35:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:49,168 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 4763 transitions. [2022-11-20 10:35:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4763 transitions. [2022-11-20 10:35:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:49,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:49,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:49,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 10:35:49,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:49,370 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1862644026, now seen corresponding path program 1 times [2022-11-20 10:35:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861752408] [2022-11-20 10:35:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:49,373 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:49,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 10:35:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:35:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:49,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:35:49,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:35:49,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:35:49,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:35:49,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:35:49,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:35:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:49,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:52,574 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:35:52,574 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 55 treesize of output 62 [2022-11-20 10:35:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:52,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861752408] [2022-11-20 10:35:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861752408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:52,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:52,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635401525] [2022-11-20 10:35:52,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:52,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:52,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:52,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:52,771 INFO L87 Difference]: Start difference. First operand 1258 states and 4763 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:55,889 INFO L93 Difference]: Finished difference Result 2880 states and 11073 transitions. [2022-11-20 10:35:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:35:55,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:55,898 INFO L225 Difference]: With dead ends: 2880 [2022-11-20 10:35:55,899 INFO L226 Difference]: Without dead ends: 2880 [2022-11-20 10:35:55,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:35:55,899 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 226 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:55,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 0 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 390 Invalid, 0 Unknown, 369 Unchecked, 2.8s Time] [2022-11-20 10:35:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-11-20 10:35:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 1294. [2022-11-20 10:35:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1219 states have (on average 3.981132075471698) internal successors, (4853), 1293 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4853 transitions. [2022-11-20 10:35:55,942 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4853 transitions. Word has length 10 [2022-11-20 10:35:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:55,942 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 4853 transitions. [2022-11-20 10:35:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4853 transitions. [2022-11-20 10:35:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:55,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:55,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:55,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:56,157 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:56,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1862644074, now seen corresponding path program 1 times [2022-11-20 10:35:56,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:56,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202774809] [2022-11-20 10:35:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:56,159 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:56,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 10:35:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:35:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:56,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:35:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:35:56,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:35:56,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202774809] [2022-11-20 10:35:56,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202774809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:56,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:56,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:35:56,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659565206] [2022-11-20 10:35:56,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:56,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:35:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:35:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:35:56,378 INFO L87 Difference]: Start difference. First operand 1294 states and 4853 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:56,900 INFO L93 Difference]: Finished difference Result 1042 states and 3770 transitions. [2022-11-20 10:35:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:35:56,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:56,904 INFO L225 Difference]: With dead ends: 1042 [2022-11-20 10:35:56,904 INFO L226 Difference]: Without dead ends: 1042 [2022-11-20 10:35:56,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:35:56,904 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:56,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:35:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-11-20 10:35:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1042. [2022-11-20 10:35:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 994 states have (on average 3.7927565392354126) internal successors, (3770), 1041 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3770 transitions. [2022-11-20 10:35:56,925 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3770 transitions. Word has length 10 [2022-11-20 10:35:56,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:56,926 INFO L495 AbstractCegarLoop]: Abstraction has 1042 states and 3770 transitions. [2022-11-20 10:35:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:56,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3770 transitions. [2022-11-20 10:35:56,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:56,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:56,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:56,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-20 10:35:57,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:57,140 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:35:57,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:57,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1862644075, now seen corresponding path program 1 times [2022-11-20 10:35:57,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:35:57,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251455922] [2022-11-20 10:35:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:57,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:35:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:35:57,142 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:35:57,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 10:35:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:57,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:35:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:57,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:57,631 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 35 treesize of output 31 [2022-11-20 10:35:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:35:57,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:35:57,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251455922] [2022-11-20 10:35:57,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251455922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:57,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:57,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:35:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915758722] [2022-11-20 10:35:57,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:35:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:35:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:35:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:35:57,833 INFO L87 Difference]: Start difference. First operand 1042 states and 3770 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:01,001 INFO L93 Difference]: Finished difference Result 2487 states and 8954 transitions. [2022-11-20 10:36:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:36:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:36:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:01,009 INFO L225 Difference]: With dead ends: 2487 [2022-11-20 10:36:01,009 INFO L226 Difference]: Without dead ends: 2487 [2022-11-20 10:36:01,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:36:01,010 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 351 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:01,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 0 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 10:36:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-11-20 10:36:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1258. [2022-11-20 10:36:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1210 states have (on average 3.986776859504132) internal successors, (4824), 1257 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4824 transitions. [2022-11-20 10:36:01,039 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4824 transitions. Word has length 10 [2022-11-20 10:36:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:01,039 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 4824 transitions. [2022-11-20 10:36:01,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4824 transitions. [2022-11-20 10:36:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:36:01,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:01,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:01,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:01,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:01,243 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -600649949, now seen corresponding path program 1 times [2022-11-20 10:36:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:01,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74972535] [2022-11-20 10:36:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:01,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:01,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:01,245 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 10:36:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:36:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:01,528 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:01,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:01,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:01,619 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:36:01,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:01,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:01,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74972535] [2022-11-20 10:36:01,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74972535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:01,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:01,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:01,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374755921] [2022-11-20 10:36:01,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:01,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:01,717 INFO L87 Difference]: Start difference. First operand 1258 states and 4824 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:02,268 INFO L93 Difference]: Finished difference Result 1267 states and 4839 transitions. [2022-11-20 10:36:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:36:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:02,272 INFO L225 Difference]: With dead ends: 1267 [2022-11-20 10:36:02,272 INFO L226 Difference]: Without dead ends: 1267 [2022-11-20 10:36:02,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:02,273 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:02,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:36:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-20 10:36:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-11-20 10:36:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1219 states have (on average 3.969647251845775) internal successors, (4839), 1266 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4839 transitions. [2022-11-20 10:36:02,302 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4839 transitions. Word has length 10 [2022-11-20 10:36:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:02,303 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 4839 transitions. [2022-11-20 10:36:02,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4839 transitions. [2022-11-20 10:36:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:36:02,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:02,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:02,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:02,516 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash -489819048, now seen corresponding path program 1 times [2022-11-20 10:36:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108751090] [2022-11-20 10:36:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:02,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:02,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:02,517 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:02,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 10:36:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:36:02,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:02,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:02,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:02,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108751090] [2022-11-20 10:36:02,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108751090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:02,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:02,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632700375] [2022-11-20 10:36:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:02,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:02,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:02,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:02,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:02,775 INFO L87 Difference]: Start difference. First operand 1267 states and 4839 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:03,683 INFO L93 Difference]: Finished difference Result 1470 states and 5323 transitions. [2022-11-20 10:36:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:36:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:36:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:03,690 INFO L225 Difference]: With dead ends: 1470 [2022-11-20 10:36:03,690 INFO L226 Difference]: Without dead ends: 1467 [2022-11-20 10:36:03,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:03,691 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:03,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:36:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-11-20 10:36:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1438. [2022-11-20 10:36:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1390 states have (on average 3.8028776978417267) internal successors, (5286), 1437 states have internal predecessors, (5286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 5286 transitions. [2022-11-20 10:36:03,742 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 5286 transitions. Word has length 10 [2022-11-20 10:36:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:03,743 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 5286 transitions. [2022-11-20 10:36:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 5286 transitions. [2022-11-20 10:36:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:36:03,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:03,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:03,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:03,953 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1541522600, now seen corresponding path program 1 times [2022-11-20 10:36:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:03,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530266317] [2022-11-20 10:36:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:03,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:03,955 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:03,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 10:36:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:04,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:36:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:04,262 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:04,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:04,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:04,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:04,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:36:04,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:04,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:04,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530266317] [2022-11-20 10:36:04,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530266317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:04,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444899866] [2022-11-20 10:36:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:04,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:04,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:04,438 INFO L87 Difference]: Start difference. First operand 1438 states and 5286 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:04,937 INFO L93 Difference]: Finished difference Result 1441 states and 5289 transitions. [2022-11-20 10:36:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:04,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:36:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:04,943 INFO L225 Difference]: With dead ends: 1441 [2022-11-20 10:36:04,943 INFO L226 Difference]: Without dead ends: 1441 [2022-11-20 10:36:04,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:04,944 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:04,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:36:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-11-20 10:36:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1435. [2022-11-20 10:36:04,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1387 states have (on average 3.807498197548666) internal successors, (5281), 1434 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 5281 transitions. [2022-11-20 10:36:04,968 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 5281 transitions. Word has length 10 [2022-11-20 10:36:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:04,968 INFO L495 AbstractCegarLoop]: Abstraction has 1435 states and 5281 transitions. [2022-11-20 10:36:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 5281 transitions. [2022-11-20 10:36:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:36:04,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:04,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:04,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:05,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:05,170 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1545094668, now seen corresponding path program 1 times [2022-11-20 10:36:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:05,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892836894] [2022-11-20 10:36:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:05,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:05,171 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:05,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 10:36:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:05,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:36:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:05,515 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:05,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:05,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:05,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:05,606 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:36:05,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:05,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:05,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892836894] [2022-11-20 10:36:05,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892836894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:05,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:05,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191456213] [2022-11-20 10:36:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:05,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:05,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:05,686 INFO L87 Difference]: Start difference. First operand 1435 states and 5281 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:06,205 INFO L93 Difference]: Finished difference Result 1436 states and 5282 transitions. [2022-11-20 10:36:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:06,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:36:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:06,211 INFO L225 Difference]: With dead ends: 1436 [2022-11-20 10:36:06,211 INFO L226 Difference]: Without dead ends: 1436 [2022-11-20 10:36:06,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:06,212 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:06,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:36:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-11-20 10:36:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1431. [2022-11-20 10:36:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1383 states have (on average 3.812002892263196) internal successors, (5272), 1430 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 5272 transitions. [2022-11-20 10:36:06,248 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 5272 transitions. Word has length 10 [2022-11-20 10:36:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:06,248 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 5272 transitions. [2022-11-20 10:36:06,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 5272 transitions. [2022-11-20 10:36:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:06,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:06,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:06,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:06,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:06,462 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash -730591740, now seen corresponding path program 2 times [2022-11-20 10:36:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:06,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176429498] [2022-11-20 10:36:06,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:36:06,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:06,464 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:06,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 10:36:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:36:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:36:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:36:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:06,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:36:06,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:36:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:06,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:36:06,846 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:36:06,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:36:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:36:06,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:07,506 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:36:07,506 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 57 treesize of output 64 [2022-11-20 10:36:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:36:07,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176429498] [2022-11-20 10:36:07,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176429498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:07,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:36:07,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680800036] [2022-11-20 10:36:07,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:07,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:36:07,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:36:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:36:07,823 INFO L87 Difference]: Start difference. First operand 1431 states and 5272 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:10,472 INFO L93 Difference]: Finished difference Result 3223 states and 11843 transitions. [2022-11-20 10:36:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:36:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:10,484 INFO L225 Difference]: With dead ends: 3223 [2022-11-20 10:36:10,484 INFO L226 Difference]: Without dead ends: 3223 [2022-11-20 10:36:10,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:36:10,485 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:10,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 0 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 176 Unchecked, 2.5s Time] [2022-11-20 10:36:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-11-20 10:36:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 1945. [2022-11-20 10:36:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1897 states have (on average 4.16025303110174) internal successors, (7892), 1944 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 7892 transitions. [2022-11-20 10:36:10,556 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 7892 transitions. Word has length 11 [2022-11-20 10:36:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:10,557 INFO L495 AbstractCegarLoop]: Abstraction has 1945 states and 7892 transitions. [2022-11-20 10:36:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 7892 transitions. [2022-11-20 10:36:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:10,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:10,558 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:10,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:10,770 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -730591859, now seen corresponding path program 1 times [2022-11-20 10:36:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:10,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717084886] [2022-11-20 10:36:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:10,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:10,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:10,772 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:10,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 10:36:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:36:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:36:11,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:11,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717084886] [2022-11-20 10:36:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717084886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:11,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:11,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:36:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846250444] [2022-11-20 10:36:11,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:11,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:36:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:36:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:36:11,468 INFO L87 Difference]: Start difference. First operand 1945 states and 7892 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:14,319 INFO L93 Difference]: Finished difference Result 3729 states and 13689 transitions. [2022-11-20 10:36:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:36:14,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:14,352 INFO L225 Difference]: With dead ends: 3729 [2022-11-20 10:36:14,352 INFO L226 Difference]: Without dead ends: 3729 [2022-11-20 10:36:14,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:36:14,353 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 491 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:14,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 0 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 38 Unchecked, 2.7s Time] [2022-11-20 10:36:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-11-20 10:36:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 1945. [2022-11-20 10:36:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1897 states have (on average 4.16025303110174) internal successors, (7892), 1944 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 7892 transitions. [2022-11-20 10:36:14,396 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 7892 transitions. Word has length 11 [2022-11-20 10:36:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:14,397 INFO L495 AbstractCegarLoop]: Abstraction has 1945 states and 7892 transitions. [2022-11-20 10:36:14,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 7892 transitions. [2022-11-20 10:36:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:14,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:14,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:14,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-20 10:36:14,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:14,598 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash 893872367, now seen corresponding path program 1 times [2022-11-20 10:36:14,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:14,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959901885] [2022-11-20 10:36:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:14,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:14,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:14,600 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:14,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 10:36:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:36:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:15,017 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 10:36:15,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 10:36:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:15,085 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 18 treesize of output 24 [2022-11-20 10:36:15,174 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:36:15,175 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 18 treesize of output 28 [2022-11-20 10:36:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:36:15,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:15,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959901885] [2022-11-20 10:36:15,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959901885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:15,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:36:15,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090109297] [2022-11-20 10:36:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:36:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:36:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:15,372 INFO L87 Difference]: Start difference. First operand 1945 states and 7892 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:15,951 INFO L93 Difference]: Finished difference Result 1951 states and 7909 transitions. [2022-11-20 10:36:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:36:15,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:15,959 INFO L225 Difference]: With dead ends: 1951 [2022-11-20 10:36:15,959 INFO L226 Difference]: Without dead ends: 1951 [2022-11-20 10:36:15,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:15,959 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:15,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-11-20 10:36:15,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-20 10:36:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2022-11-20 10:36:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1901 states have (on average 4.158863755917938) internal successors, (7906), 1948 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 7906 transitions. [2022-11-20 10:36:16,012 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 7906 transitions. Word has length 11 [2022-11-20 10:36:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:16,012 INFO L495 AbstractCegarLoop]: Abstraction has 1949 states and 7906 transitions. [2022-11-20 10:36:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 7906 transitions. [2022-11-20 10:36:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:16,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:16,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:16,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:16,227 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 899148257, now seen corresponding path program 2 times [2022-11-20 10:36:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028599473] [2022-11-20 10:36:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:36:16,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:16,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:16,229 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:16,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 10:36:16,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:36:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:36:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:36:16,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:16,533 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 10:36:16,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 10:36:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:16,596 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 18 treesize of output 24 [2022-11-20 10:36:16,685 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:36:16,685 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 18 treesize of output 28 [2022-11-20 10:36:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:36:16,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:16,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028599473] [2022-11-20 10:36:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028599473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:16,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:16,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:36:16,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130089497] [2022-11-20 10:36:16,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:16,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:36:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:36:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:16,835 INFO L87 Difference]: Start difference. First operand 1949 states and 7906 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:17,292 INFO L93 Difference]: Finished difference Result 1954 states and 7919 transitions. [2022-11-20 10:36:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:36:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:17,299 INFO L225 Difference]: With dead ends: 1954 [2022-11-20 10:36:17,299 INFO L226 Difference]: Without dead ends: 1954 [2022-11-20 10:36:17,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:17,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:17,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 10:36:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-11-20 10:36:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1947. [2022-11-20 10:36:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1899 states have (on average 4.160084254870985) internal successors, (7900), 1946 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 7900 transitions. [2022-11-20 10:36:17,376 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 7900 transitions. Word has length 11 [2022-11-20 10:36:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:17,377 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 7900 transitions. [2022-11-20 10:36:17,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 7900 transitions. [2022-11-20 10:36:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:17,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:17,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:17,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:17,587 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:17,587 INFO L85 PathProgramCache]: Analyzing trace with hash 899020847, now seen corresponding path program 3 times [2022-11-20 10:36:17,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:17,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910797429] [2022-11-20 10:36:17,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:36:17,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:17,589 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:17,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 10:36:17,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:36:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:36:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:36:17,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:17,908 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 10:36:17,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 10:36:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:17,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 10:36:18,022 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:36:18,022 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 18 treesize of output 28 [2022-11-20 10:36:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:36:18,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:18,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:18,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910797429] [2022-11-20 10:36:18,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910797429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:18,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:18,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:36:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762365335] [2022-11-20 10:36:18,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:36:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:36:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:18,184 INFO L87 Difference]: Start difference. First operand 1947 states and 7900 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:18,643 INFO L93 Difference]: Finished difference Result 1951 states and 7906 transitions. [2022-11-20 10:36:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:36:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:18,649 INFO L225 Difference]: With dead ends: 1951 [2022-11-20 10:36:18,649 INFO L226 Difference]: Without dead ends: 1951 [2022-11-20 10:36:18,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:18,650 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2022-11-20 10:36:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-20 10:36:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1943. [2022-11-20 10:36:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1895 states have (on average 4.1604221635883905) internal successors, (7884), 1942 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 7884 transitions. [2022-11-20 10:36:18,682 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 7884 transitions. Word has length 11 [2022-11-20 10:36:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:18,683 INFO L495 AbstractCegarLoop]: Abstraction has 1943 states and 7884 transitions. [2022-11-20 10:36:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 7884 transitions. [2022-11-20 10:36:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:18,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:18,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:18,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:18,896 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1521699586, now seen corresponding path program 1 times [2022-11-20 10:36:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:18,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154045933] [2022-11-20 10:36:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:18,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:18,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:18,898 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:18,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 10:36:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:36:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:19,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:19,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154045933] [2022-11-20 10:36:19,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154045933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:19,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:19,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:36:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665546304] [2022-11-20 10:36:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:36:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:36:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:19,201 INFO L87 Difference]: Start difference. First operand 1943 states and 7884 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:20,486 INFO L93 Difference]: Finished difference Result 2988 states and 12228 transitions. [2022-11-20 10:36:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:20,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:20,496 INFO L225 Difference]: With dead ends: 2988 [2022-11-20 10:36:20,496 INFO L226 Difference]: Without dead ends: 2988 [2022-11-20 10:36:20,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:36:20,496 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:20,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 10:36:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-20 10:36:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1936. [2022-11-20 10:36:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1888 states have (on average 4.0116525423728815) internal successors, (7574), 1935 states have internal predecessors, (7574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 7574 transitions. [2022-11-20 10:36:20,535 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 7574 transitions. Word has length 11 [2022-11-20 10:36:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:20,535 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 7574 transitions. [2022-11-20 10:36:20,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 7574 transitions. [2022-11-20 10:36:20,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:20,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:20,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:20,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:20,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:20,751 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash -238351469, now seen corresponding path program 1 times [2022-11-20 10:36:20,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481897717] [2022-11-20 10:36:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:20,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:20,752 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:20,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 10:36:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:36:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:21,058 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:21,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:21,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:21,160 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:36:21,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:21,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:21,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481897717] [2022-11-20 10:36:21,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481897717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:21,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:21,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663642677] [2022-11-20 10:36:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:21,234 INFO L87 Difference]: Start difference. First operand 1936 states and 7574 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:21,713 INFO L93 Difference]: Finished difference Result 1946 states and 7590 transitions. [2022-11-20 10:36:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:21,719 INFO L225 Difference]: With dead ends: 1946 [2022-11-20 10:36:21,719 INFO L226 Difference]: Without dead ends: 1946 [2022-11-20 10:36:21,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:21,720 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:21,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 10:36:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-11-20 10:36:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1933. [2022-11-20 10:36:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1885 states have (on average 4.015915119363395) internal successors, (7570), 1932 states have internal predecessors, (7570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 7570 transitions. [2022-11-20 10:36:21,767 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 7570 transitions. Word has length 11 [2022-11-20 10:36:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:21,767 INFO L495 AbstractCegarLoop]: Abstraction has 1933 states and 7570 transitions. [2022-11-20 10:36:21,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 7570 transitions. [2022-11-20 10:36:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:21,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:21,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:21,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:21,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:21,981 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1903821080, now seen corresponding path program 1 times [2022-11-20 10:36:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:21,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293341515] [2022-11-20 10:36:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:21,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:21,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:21,983 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:21,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 10:36:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:22,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:36:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:22,327 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:22,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:22,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:22,421 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:36:22,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:36:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:36:22,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:22,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:22,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293341515] [2022-11-20 10:36:22,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293341515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:22,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:22,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:36:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593711044] [2022-11-20 10:36:22,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:36:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:36:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:36:22,521 INFO L87 Difference]: Start difference. First operand 1933 states and 7570 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:23,054 INFO L93 Difference]: Finished difference Result 1936 states and 7575 transitions. [2022-11-20 10:36:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:36:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:23,062 INFO L225 Difference]: With dead ends: 1936 [2022-11-20 10:36:23,062 INFO L226 Difference]: Without dead ends: 1936 [2022-11-20 10:36:23,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:23,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:23,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:36:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2022-11-20 10:36:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1936. [2022-11-20 10:36:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1888 states have (on average 4.0121822033898304) internal successors, (7575), 1935 states have internal predecessors, (7575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 7575 transitions. [2022-11-20 10:36:23,151 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 7575 transitions. Word has length 11 [2022-11-20 10:36:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:23,151 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 7575 transitions. [2022-11-20 10:36:23,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 7575 transitions. [2022-11-20 10:36:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:23,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:23,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:23,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:23,353 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1903820907, now seen corresponding path program 1 times [2022-11-20 10:36:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230266873] [2022-11-20 10:36:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:23,355 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:23,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 10:36:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:36:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:23,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:36:23,776 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:36:23,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:36:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:24,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:25,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230266873] [2022-11-20 10:36:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230266873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:25,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:36:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680204908] [2022-11-20 10:36:25,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:25,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:36:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:36:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:36:25,468 INFO L87 Difference]: Start difference. First operand 1936 states and 7575 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:28,821 INFO L93 Difference]: Finished difference Result 4188 states and 15385 transitions. [2022-11-20 10:36:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:36:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:28,838 INFO L225 Difference]: With dead ends: 4188 [2022-11-20 10:36:28,838 INFO L226 Difference]: Without dead ends: 4188 [2022-11-20 10:36:28,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:36:28,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 470 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:28,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 0 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 301 Invalid, 0 Unknown, 509 Unchecked, 2.3s Time] [2022-11-20 10:36:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2022-11-20 10:36:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 2024. [2022-11-20 10:36:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1976 states have (on average 3.9696356275303644) internal successors, (7844), 2023 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 7844 transitions. [2022-11-20 10:36:28,922 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 7844 transitions. Word has length 11 [2022-11-20 10:36:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:28,922 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 7844 transitions. [2022-11-20 10:36:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 7844 transitions. [2022-11-20 10:36:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:28,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:28,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:28,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:29,137 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1907396323, now seen corresponding path program 1 times [2022-11-20 10:36:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333782886] [2022-11-20 10:36:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:29,139 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:29,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 10:36:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:36:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:29,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:36:29,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:36:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:36:29,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:36:29,593 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:36:29,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:36:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:29,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:34,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:36:34,783 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 55 treesize of output 62 [2022-11-20 10:36:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:36:34,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333782886] [2022-11-20 10:36:34,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333782886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:34,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:34,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:36:34,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832002526] [2022-11-20 10:36:34,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:34,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:36:34,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:36:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:36:34,975 INFO L87 Difference]: Start difference. First operand 2024 states and 7844 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:38,466 INFO L93 Difference]: Finished difference Result 2426 states and 8954 transitions. [2022-11-20 10:36:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:36:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:38,473 INFO L225 Difference]: With dead ends: 2426 [2022-11-20 10:36:38,473 INFO L226 Difference]: Without dead ends: 2426 [2022-11-20 10:36:38,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:36:38,474 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:38,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 178 Unchecked, 1.3s Time] [2022-11-20 10:36:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-11-20 10:36:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2027. [2022-11-20 10:36:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 1979 states have (on average 3.9706922688226376) internal successors, (7858), 2026 states have internal predecessors, (7858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 7858 transitions. [2022-11-20 10:36:38,522 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 7858 transitions. Word has length 11 [2022-11-20 10:36:38,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:38,522 INFO L495 AbstractCegarLoop]: Abstraction has 2027 states and 7858 transitions. [2022-11-20 10:36:38,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 7858 transitions. [2022-11-20 10:36:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:38,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:38,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:38,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:38,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:38,737 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1907393148, now seen corresponding path program 1 times [2022-11-20 10:36:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325390175] [2022-11-20 10:36:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:38,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:38,739 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:38,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 10:36:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:36:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:39,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:39,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325390175] [2022-11-20 10:36:39,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325390175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:39,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:39,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 10:36:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713270513] [2022-11-20 10:36:39,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:36:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:36:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:36:39,615 INFO L87 Difference]: Start difference. First operand 2027 states and 7858 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:44,720 INFO L93 Difference]: Finished difference Result 4137 states and 14828 transitions. [2022-11-20 10:36:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:36:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:44,732 INFO L225 Difference]: With dead ends: 4137 [2022-11-20 10:36:44,732 INFO L226 Difference]: Without dead ends: 4137 [2022-11-20 10:36:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:36:44,733 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 550 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:44,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 0 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 667 Invalid, 0 Unknown, 132 Unchecked, 4.3s Time] [2022-11-20 10:36:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2022-11-20 10:36:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 2287. [2022-11-20 10:36:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2239 states have (on average 4.004912907548013) internal successors, (8967), 2286 states have internal predecessors, (8967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 8967 transitions. [2022-11-20 10:36:44,800 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 8967 transitions. Word has length 11 [2022-11-20 10:36:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:44,800 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 8967 transitions. [2022-11-20 10:36:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 8967 transitions. [2022-11-20 10:36:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:44,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:44,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:44,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:45,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:45,014 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:45,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1907392714, now seen corresponding path program 1 times [2022-11-20 10:36:45,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:45,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81673234] [2022-11-20 10:36:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:45,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:45,016 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:45,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 10:36:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:36:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:45,401 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:36:45,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 10:36:45,444 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:36:45,444 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 24 [2022-11-20 10:36:45,487 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:36:45,488 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 18 treesize of output 28 [2022-11-20 10:36:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:36:45,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:36:45,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81673234] [2022-11-20 10:36:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81673234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:36:45,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:36:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:36:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208697716] [2022-11-20 10:36:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:36:45,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:36:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:36:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:45,590 INFO L87 Difference]: Start difference. First operand 2287 states and 8967 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:46,105 INFO L93 Difference]: Finished difference Result 2170 states and 8392 transitions. [2022-11-20 10:36:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:36:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:36:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:46,111 INFO L225 Difference]: With dead ends: 2170 [2022-11-20 10:36:46,112 INFO L226 Difference]: Without dead ends: 2122 [2022-11-20 10:36:46,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:36:46,112 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:46,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 1 Unchecked, 0.5s Time] [2022-11-20 10:36:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-11-20 10:36:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2108. [2022-11-20 10:36:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2072 states have (on average 3.9893822393822393) internal successors, (8266), 2107 states have internal predecessors, (8266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 8266 transitions. [2022-11-20 10:36:46,163 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 8266 transitions. Word has length 11 [2022-11-20 10:36:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:46,163 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 8266 transitions. [2022-11-20 10:36:46,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 8266 transitions. [2022-11-20 10:36:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:36:46,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:46,164 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2022-11-20 10:36:46,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:46,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:46,365 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:36:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1324480326, now seen corresponding path program 1 times [2022-11-20 10:36:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:36:46,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694922284] [2022-11-20 10:36:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:36:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:36:46,367 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:36:46,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 10:36:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:36:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:46,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:36:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:46,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:36:49,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:36:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694922284] [2022-11-20 10:36:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694922284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:36:49,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:49,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 10:36:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692171827] [2022-11-20 10:36:49,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:49,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:36:49,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:36:49,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:36:49,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:36:49,212 INFO L87 Difference]: Start difference. First operand 2108 states and 8266 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:36:54,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:36:56,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:36:57,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:36:59,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:01,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:03,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:05,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:08,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:10,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:12,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:14,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:16,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:18,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:20,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:38,831 INFO L93 Difference]: Finished difference Result 22982 states and 95926 transitions. [2022-11-20 10:37:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:37:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:37:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:39,001 INFO L225 Difference]: With dead ends: 22982 [2022-11-20 10:37:39,002 INFO L226 Difference]: Without dead ends: 22982 [2022-11-20 10:37:39,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:37:39,002 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2775 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2774 mSolverCounterSat, 236 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 2774 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:39,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2775 Valid, 0 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 2774 Invalid, 13 Unknown, 0 Unchecked, 43.7s Time] [2022-11-20 10:37:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22982 states. [2022-11-20 10:37:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22982 to 2198. [2022-11-20 10:37:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2162 states have (on average 3.9024051803885293) internal successors, (8437), 2197 states have internal predecessors, (8437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 8437 transitions. [2022-11-20 10:37:39,548 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 8437 transitions. Word has length 11 [2022-11-20 10:37:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:39,548 INFO L495 AbstractCegarLoop]: Abstraction has 2198 states and 8437 transitions. [2022-11-20 10:37:39,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 8437 transitions. [2022-11-20 10:37:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:37:39,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:39,550 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 10:37:39,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 10:37:39,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:39,755 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:37:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2136346459, now seen corresponding path program 3 times [2022-11-20 10:37:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:39,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033167451] [2022-11-20 10:37:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:37:39,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:39,758 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:39,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 10:37:40,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:37:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:40,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:37:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:40,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:40,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:37:40,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:37:43,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033167451] [2022-11-20 10:37:43,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033167451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:43,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:43,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 10:37:43,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975770962] [2022-11-20 10:37:43,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:43,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:37:43,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:43,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:37:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:37:43,712 INFO L87 Difference]: Start difference. First operand 2198 states and 8437 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:57,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:37:59,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:00,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:02,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:04,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:06,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:08,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:10,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:12,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:14,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:19,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:21,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:23,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:25,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:27,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:29,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:31,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:33,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:35,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:37,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:38:53,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:53,683 INFO L93 Difference]: Finished difference Result 18539 states and 77185 transitions. [2022-11-20 10:38:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:38:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:38:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:53,801 INFO L225 Difference]: With dead ends: 18539 [2022-11-20 10:38:53,801 INFO L226 Difference]: Without dead ends: 18539 [2022-11-20 10:38:53,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:38:53,801 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2996 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5141 mSolverCounterSat, 339 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2996 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 5141 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:53,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2996 Valid, 0 Invalid, 5499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 5141 Invalid, 19 Unknown, 0 Unchecked, 56.7s Time] [2022-11-20 10:38:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18539 states. [2022-11-20 10:38:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18539 to 2222. [2022-11-20 10:38:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2186 states have (on average 3.881518755718207) internal successors, (8485), 2221 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 8485 transitions. [2022-11-20 10:38:53,943 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 8485 transitions. Word has length 12 [2022-11-20 10:38:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:53,943 INFO L495 AbstractCegarLoop]: Abstraction has 2222 states and 8485 transitions. [2022-11-20 10:38:53,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 8485 transitions. [2022-11-20 10:38:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:38:53,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:53,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:53,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:54,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:54,145 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:38:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1582290333, now seen corresponding path program 2 times [2022-11-20 10:38:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:54,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906383009] [2022-11-20 10:38:54,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:54,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:54,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:54,147 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:54,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 10:38:54,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:54,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:54,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:38:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:54,558 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 10:38:54,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 10:38:54,705 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:38:54,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:38:54,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:38:54,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:38:54,859 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:38:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:38:54,933 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:38:54,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:38:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:38:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:06,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:06,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906383009] [2022-11-20 10:39:06,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906383009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:06,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:06,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:39:06,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541460156] [2022-11-20 10:39:06,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:06,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:39:06,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:39:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=243, Unknown=2, NotChecked=0, Total=306 [2022-11-20 10:39:06,422 INFO L87 Difference]: Start difference. First operand 2222 states and 8485 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:09,279 INFO L93 Difference]: Finished difference Result 2667 states and 9693 transitions. [2022-11-20 10:39:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:39:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:09,286 INFO L225 Difference]: With dead ends: 2667 [2022-11-20 10:39:09,286 INFO L226 Difference]: Without dead ends: 2667 [2022-11-20 10:39:09,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=92, Invalid=368, Unknown=2, NotChecked=0, Total=462 [2022-11-20 10:39:09,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:09,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 528 Unchecked, 2.5s Time] [2022-11-20 10:39:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-11-20 10:39:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2235. [2022-11-20 10:39:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2199 states have (on average 3.878581173260573) internal successors, (8529), 2234 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 8529 transitions. [2022-11-20 10:39:09,326 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 8529 transitions. Word has length 12 [2022-11-20 10:39:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:09,327 INFO L495 AbstractCegarLoop]: Abstraction has 2235 states and 8529 transitions. [2022-11-20 10:39:09,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 8529 transitions. [2022-11-20 10:39:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:39:09,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:09,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:09,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-20 10:39:09,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:09,535 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -165189802, now seen corresponding path program 1 times [2022-11-20 10:39:09,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:09,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689910271] [2022-11-20 10:39:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:09,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:09,537 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:09,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 10:39:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:39:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:09,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:39:09,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:39:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:10,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:39:10,029 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:39:10,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:39:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:39:10,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:12,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:39:12,824 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 55 treesize of output 62 [2022-11-20 10:39:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:39:13,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:13,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689910271] [2022-11-20 10:39:13,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689910271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:13,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:13,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:39:13,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401325983] [2022-11-20 10:39:13,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:13,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:13,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:13,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:13,039 INFO L87 Difference]: Start difference. First operand 2235 states and 8529 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:16,816 INFO L93 Difference]: Finished difference Result 2889 states and 10463 transitions. [2022-11-20 10:39:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:39:16,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:16,824 INFO L225 Difference]: With dead ends: 2889 [2022-11-20 10:39:16,824 INFO L226 Difference]: Without dead ends: 2889 [2022-11-20 10:39:16,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:39:16,824 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:16,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 0 Unknown, 199 Unchecked, 1.5s Time] [2022-11-20 10:39:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2022-11-20 10:39:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2247. [2022-11-20 10:39:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2211 states have (on average 3.8765264586160106) internal successors, (8571), 2246 states have internal predecessors, (8571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 8571 transitions. [2022-11-20 10:39:16,886 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 8571 transitions. Word has length 12 [2022-11-20 10:39:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:16,886 INFO L495 AbstractCegarLoop]: Abstraction has 2247 states and 8571 transitions. [2022-11-20 10:39:16,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 8571 transitions. [2022-11-20 10:39:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:39:16,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:16,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:16,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-20 10:39:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:17,087 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1414042714, now seen corresponding path program 1 times [2022-11-20 10:39:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403040029] [2022-11-20 10:39:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:17,089 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:17,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 10:39:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:39:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:17,605 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:17,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:17,757 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:39:17,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:39:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:17,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:39:17,922 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:39:17,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:39:17,981 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:39:17,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:39:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:18,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:21,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403040029] [2022-11-20 10:39:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403040029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:21,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:21,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:39:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359687243] [2022-11-20 10:39:21,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:21,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:39:21,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:39:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:39:21,854 INFO L87 Difference]: Start difference. First operand 2247 states and 8571 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:23,911 INFO L93 Difference]: Finished difference Result 2791 states and 10501 transitions. [2022-11-20 10:39:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:39:23,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:23,919 INFO L225 Difference]: With dead ends: 2791 [2022-11-20 10:39:23,919 INFO L226 Difference]: Without dead ends: 2791 [2022-11-20 10:39:23,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:39:23,920 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:23,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 263 Invalid, 0 Unknown, 360 Unchecked, 1.7s Time] [2022-11-20 10:39:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-11-20 10:39:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2440. [2022-11-20 10:39:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2404 states have (on average 3.891430948419301) internal successors, (9355), 2439 states have internal predecessors, (9355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 9355 transitions. [2022-11-20 10:39:23,969 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 9355 transitions. Word has length 12 [2022-11-20 10:39:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 9355 transitions. [2022-11-20 10:39:23,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 9355 transitions. [2022-11-20 10:39:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:39:23,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:23,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:23,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:24,172 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1414042617, now seen corresponding path program 1 times [2022-11-20 10:39:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466554442] [2022-11-20 10:39:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:24,174 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:24,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 10:39:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:39:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:24,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-20 10:39:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:24,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466554442] [2022-11-20 10:39:24,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466554442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:24,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:24,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:39:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769510814] [2022-11-20 10:39:24,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:24,930 INFO L87 Difference]: Start difference. First operand 2440 states and 9355 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:27,249 INFO L93 Difference]: Finished difference Result 4732 states and 18986 transitions. [2022-11-20 10:39:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:39:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:27,262 INFO L225 Difference]: With dead ends: 4732 [2022-11-20 10:39:27,262 INFO L226 Difference]: Without dead ends: 4732 [2022-11-20 10:39:27,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:39:27,263 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 236 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:27,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 10:39:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2022-11-20 10:39:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 3027. [2022-11-20 10:39:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 2991 states have (on average 4.11267134737546) internal successors, (12301), 3026 states have internal predecessors, (12301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 12301 transitions. [2022-11-20 10:39:27,329 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 12301 transitions. Word has length 12 [2022-11-20 10:39:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:27,329 INFO L495 AbstractCegarLoop]: Abstraction has 3027 states and 12301 transitions. [2022-11-20 10:39:27,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 12301 transitions. [2022-11-20 10:39:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:39:27,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:27,330 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:27,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:27,543 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash 571293498, now seen corresponding path program 2 times [2022-11-20 10:39:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:27,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099829926] [2022-11-20 10:39:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:27,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:27,544 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:27,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 10:39:27,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:39:27,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:39:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:27,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:39:27,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:39:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:27,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:39:27,931 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:39:27,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:39:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:39:28,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:39:28,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:28,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099829926] [2022-11-20 10:39:28,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099829926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:28,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:28,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:39:28,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627155643] [2022-11-20 10:39:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:39:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:28,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:39:28,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:39:28,024 INFO L87 Difference]: Start difference. First operand 3027 states and 12301 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:28,970 INFO L93 Difference]: Finished difference Result 3649 states and 14248 transitions. [2022-11-20 10:39:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:39:28,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:28,980 INFO L225 Difference]: With dead ends: 3649 [2022-11-20 10:39:28,980 INFO L226 Difference]: Without dead ends: 3628 [2022-11-20 10:39:28,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:39:28,981 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:28,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:39:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2022-11-20 10:39:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 3186. [2022-11-20 10:39:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3150 states have (on average 4.111428571428571) internal successors, (12951), 3185 states have internal predecessors, (12951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 12951 transitions. [2022-11-20 10:39:29,050 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 12951 transitions. Word has length 12 [2022-11-20 10:39:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:29,050 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 12951 transitions. [2022-11-20 10:39:29,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 12951 transitions. [2022-11-20 10:39:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:39:29,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:29,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:29,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-20 10:39:29,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:29,252 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1000365706, now seen corresponding path program 1 times [2022-11-20 10:39:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:29,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400217978] [2022-11-20 10:39:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:29,254 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:29,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 10:39:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:39:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:29,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400217978] [2022-11-20 10:39:29,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400217978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:29,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:29,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:39:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436378410] [2022-11-20 10:39:29,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:29,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:39:29,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:39:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:39:29,923 INFO L87 Difference]: Start difference. First operand 3186 states and 12951 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:32,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:32,697 INFO L93 Difference]: Finished difference Result 5418 states and 21503 transitions. [2022-11-20 10:39:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:39:32,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:39:32,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:32,712 INFO L225 Difference]: With dead ends: 5418 [2022-11-20 10:39:32,712 INFO L226 Difference]: Without dead ends: 5344 [2022-11-20 10:39:32,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:39:32,712 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 508 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:32,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 0 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 422 Invalid, 0 Unknown, 61 Unchecked, 2.6s Time] [2022-11-20 10:39:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2022-11-20 10:39:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 3255. [2022-11-20 10:39:32,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3219 states have (on average 4.120534327430879) internal successors, (13264), 3254 states have internal predecessors, (13264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 13264 transitions. [2022-11-20 10:39:32,786 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 13264 transitions. Word has length 12 [2022-11-20 10:39:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:32,787 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 13264 transitions. [2022-11-20 10:39:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 13264 transitions. [2022-11-20 10:39:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:32,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:32,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:32,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:32,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:32,988 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1806322986, now seen corresponding path program 1 times [2022-11-20 10:39:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:32,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654234388] [2022-11-20 10:39:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:32,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:32,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:32,991 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:32,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 10:39:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:39:33,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:33,533 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:33,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:33,694 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:39:33,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:39:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:33,926 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 19 treesize of output 19 [2022-11-20 10:39:33,951 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:39:33,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:39:34,062 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:39:34,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:39:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:34,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:37,352 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (bvmul (_ bv4 32) c_~i_AB~0))) (let ((.cse1 (bvadd (_ bv8 32) c_~A~0.offset .cse3)) (.cse0 (bvadd (_ bv4 32) c_~A~0.offset .cse3))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_245| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~size#1_266| (_ BitVec 32))) (or (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_266| (_ bv1073741823 32))) (not (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_245| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_266|)) c_~A~0.base))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_266|))) (bvule .cse0 .cse1)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_266| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_245| (_ BitVec 32))) (let ((.cse2 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_245| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_266|)) c_~A~0.base))) (or (bvule .cse1 .cse2) (not (bvule .cse0 .cse2))))) (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_266| (_ bv1073741823 32))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_266|)))))) is different from false [2022-11-20 10:39:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:39,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654234388] [2022-11-20 10:39:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654234388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:39,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:39,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:39:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873801034] [2022-11-20 10:39:39,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:39:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:39:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=218, Unknown=1, NotChecked=30, Total=306 [2022-11-20 10:39:39,718 INFO L87 Difference]: Start difference. First operand 3255 states and 13264 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:46,439 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 37 DAG size of output: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:39:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:49,346 INFO L93 Difference]: Finished difference Result 3393 states and 13600 transitions. [2022-11-20 10:39:49,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:39:49,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:49,357 INFO L225 Difference]: With dead ends: 3393 [2022-11-20 10:39:49,357 INFO L226 Difference]: Without dead ends: 3393 [2022-11-20 10:39:49,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=69, Invalid=276, Unknown=1, NotChecked=34, Total=380 [2022-11-20 10:39:49,358 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 249 Unchecked, 1.1s Time] [2022-11-20 10:39:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2022-11-20 10:39:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 3318. [2022-11-20 10:39:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3318 states, 3282 states have (on average 4.092931139549055) internal successors, (13433), 3317 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3318 states to 3318 states and 13433 transitions. [2022-11-20 10:39:49,450 INFO L78 Accepts]: Start accepts. Automaton has 3318 states and 13433 transitions. Word has length 13 [2022-11-20 10:39:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:49,450 INFO L495 AbstractCegarLoop]: Abstraction has 3318 states and 13433 transitions. [2022-11-20 10:39:49,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3318 states and 13433 transitions. [2022-11-20 10:39:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:49,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:49,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:49,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:49,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:49,655 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:39:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1811598876, now seen corresponding path program 2 times [2022-11-20 10:39:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538442450] [2022-11-20 10:39:49,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:49,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:49,657 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:49,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 10:39:49,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:49,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:39:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:50,117 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 10:39:50,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 10:39:50,260 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:39:50,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:39:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:39:50,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:39:50,411 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:39:50,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:39:50,498 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:39:50,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:39:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:58,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:58,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538442450] [2022-11-20 10:39:58,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538442450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:58,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:58,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:39:58,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697851955] [2022-11-20 10:39:58,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:39:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:39:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:39:58,999 INFO L87 Difference]: Start difference. First operand 3318 states and 13433 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:04,683 INFO L93 Difference]: Finished difference Result 6046 states and 22517 transitions. [2022-11-20 10:40:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:40:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:04,702 INFO L225 Difference]: With dead ends: 6046 [2022-11-20 10:40:04,703 INFO L226 Difference]: Without dead ends: 6046 [2022-11-20 10:40:04,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:40:04,703 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 198 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:04,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 0 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 793 Invalid, 0 Unknown, 540 Unchecked, 4.6s Time] [2022-11-20 10:40:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2022-11-20 10:40:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 3296. [2022-11-20 10:40:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3260 states have (on average 4.10521472392638) internal successors, (13383), 3295 states have internal predecessors, (13383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 13383 transitions. [2022-11-20 10:40:04,835 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 13383 transitions. Word has length 13 [2022-11-20 10:40:04,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:04,835 INFO L495 AbstractCegarLoop]: Abstraction has 3296 states and 13383 transitions. [2022-11-20 10:40:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 13383 transitions. [2022-11-20 10:40:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:04,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:04,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:04,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-20 10:40:05,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:05,043 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:05,044 INFO L85 PathProgramCache]: Analyzing trace with hash 491470293, now seen corresponding path program 1 times [2022-11-20 10:40:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:05,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756505928] [2022-11-20 10:40:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:05,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:05,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:05,045 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:05,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 10:40:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:40:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:05,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:05,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:05,819 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:40:05,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:40:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:06,042 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 21 treesize of output 21 [2022-11-20 10:40:06,087 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:40:06,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:40:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:06,231 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 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:40:06,274 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 10:40:06,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:40:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:40:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:40:12,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756505928] [2022-11-20 10:40:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756505928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:12,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:12,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:40:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179450498] [2022-11-20 10:40:12,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:40:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:40:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:40:12,158 INFO L87 Difference]: Start difference. First operand 3296 states and 13383 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:16,225 INFO L93 Difference]: Finished difference Result 6652 states and 25120 transitions. [2022-11-20 10:40:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:40:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:16,243 INFO L225 Difference]: With dead ends: 6652 [2022-11-20 10:40:16,243 INFO L226 Difference]: Without dead ends: 6652 [2022-11-20 10:40:16,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:40:16,244 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 773 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:16,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 425 Invalid, 0 Unknown, 773 Unchecked, 3.4s Time] [2022-11-20 10:40:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2022-11-20 10:40:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 3702. [2022-11-20 10:40:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3666 states have (on average 4.168303327877796) internal successors, (15281), 3701 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 15281 transitions. [2022-11-20 10:40:16,347 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 15281 transitions. Word has length 13 [2022-11-20 10:40:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:16,348 INFO L495 AbstractCegarLoop]: Abstraction has 3702 states and 15281 transitions. [2022-11-20 10:40:16,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 15281 transitions. [2022-11-20 10:40:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:16,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:16,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:16,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 10:40:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:16,549 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash -885643757, now seen corresponding path program 1 times [2022-11-20 10:40:16,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:16,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271025396] [2022-11-20 10:40:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:16,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:16,551 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:16,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 10:40:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:40:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:40:17,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:40:17,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:17,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271025396] [2022-11-20 10:40:17,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271025396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:17,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:17,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:40:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761687139] [2022-11-20 10:40:17,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:17,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:40:17,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:40:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:40:17,327 INFO L87 Difference]: Start difference. First operand 3702 states and 15281 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:20,104 INFO L93 Difference]: Finished difference Result 4648 states and 17846 transitions. [2022-11-20 10:40:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:40:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:20,118 INFO L225 Difference]: With dead ends: 4648 [2022-11-20 10:40:20,118 INFO L226 Difference]: Without dead ends: 4563 [2022-11-20 10:40:20,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:40:20,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:20,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 0 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 10:40:20,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2022-11-20 10:40:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 3831. [2022-11-20 10:40:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3795 states have (on average 4.077733860342556) internal successors, (15475), 3830 states have internal predecessors, (15475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 15475 transitions. [2022-11-20 10:40:20,218 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 15475 transitions. Word has length 13 [2022-11-20 10:40:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:20,218 INFO L495 AbstractCegarLoop]: Abstraction has 3831 states and 15475 transitions. [2022-11-20 10:40:20,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 15475 transitions. [2022-11-20 10:40:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:20,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:20,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:20,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-20 10:40:20,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:20,423 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash -723877402, now seen corresponding path program 2 times [2022-11-20 10:40:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013649304] [2022-11-20 10:40:20,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:40:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:20,425 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:20,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 10:40:20,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:40:20,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:20,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:40:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:20,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:40:20,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:40:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:20,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:40:20,893 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:40:20,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:40:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:40:21,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:24,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:40:24,190 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 55 treesize of output 62 [2022-11-20 10:40:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:40:24,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:24,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013649304] [2022-11-20 10:40:24,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013649304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:24,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:24,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:40:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630681058] [2022-11-20 10:40:24,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:40:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:40:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:40:24,309 INFO L87 Difference]: Start difference. First operand 3831 states and 15475 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:30,011 INFO L93 Difference]: Finished difference Result 7385 states and 29172 transitions. [2022-11-20 10:40:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:40:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:30,032 INFO L225 Difference]: With dead ends: 7385 [2022-11-20 10:40:30,032 INFO L226 Difference]: Without dead ends: 7327 [2022-11-20 10:40:30,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:40:30,033 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:30,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 0 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1282 Invalid, 0 Unknown, 240 Unchecked, 5.4s Time] [2022-11-20 10:40:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7327 states. [2022-11-20 10:40:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7327 to 4225. [2022-11-20 10:40:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4189 states have (on average 4.232513726426355) internal successors, (17730), 4224 states have internal predecessors, (17730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 17730 transitions. [2022-11-20 10:40:30,177 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 17730 transitions. Word has length 13 [2022-11-20 10:40:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:30,177 INFO L495 AbstractCegarLoop]: Abstraction has 4225 states and 17730 transitions. [2022-11-20 10:40:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 17730 transitions. [2022-11-20 10:40:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:30,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:30,178 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:30,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 10:40:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:30,378 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash -723877353, now seen corresponding path program 1 times [2022-11-20 10:40:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:30,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792957219] [2022-11-20 10:40:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:40:30,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:30,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:30,380 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:30,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 10:40:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:40:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:30,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:40:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:40:30,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:40:32,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:32,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792957219] [2022-11-20 10:40:32,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792957219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:32,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:32,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:40:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745869929] [2022-11-20 10:40:32,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:32,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:40:32,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:40:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:32,025 INFO L87 Difference]: Start difference. First operand 4225 states and 17730 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:35,246 INFO L93 Difference]: Finished difference Result 6578 states and 26912 transitions. [2022-11-20 10:40:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:40:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:35,326 INFO L225 Difference]: With dead ends: 6578 [2022-11-20 10:40:35,326 INFO L226 Difference]: Without dead ends: 6549 [2022-11-20 10:40:35,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:40:35,327 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 345 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:35,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 0 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 343 Invalid, 0 Unknown, 56 Unchecked, 2.9s Time] [2022-11-20 10:40:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2022-11-20 10:40:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 4841. [2022-11-20 10:40:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4805 states have (on average 4.345057232049948) internal successors, (20878), 4840 states have internal predecessors, (20878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 20878 transitions. [2022-11-20 10:40:35,456 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 20878 transitions. Word has length 13 [2022-11-20 10:40:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:35,456 INFO L495 AbstractCegarLoop]: Abstraction has 4841 states and 20878 transitions. [2022-11-20 10:40:35,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 20878 transitions. [2022-11-20 10:40:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:35,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:35,457 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:35,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 10:40:35,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:35,658 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash 687993062, now seen corresponding path program 2 times [2022-11-20 10:40:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61434713] [2022-11-20 10:40:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:40:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:35,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:35,660 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 10:40:35,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:40:35,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:40:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:36,078 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:36,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:36,280 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:40:36,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:40:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:36,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:40:36,464 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:40:36,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:40:36,560 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:40:36,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:40:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:40:36,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:40:36,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:36,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61434713] [2022-11-20 10:40:36,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61434713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:40:36,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:40:36,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:40:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434106718] [2022-11-20 10:40:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:40:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:40:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:40:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:40:36,932 INFO L87 Difference]: Start difference. First operand 4841 states and 20878 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:37,545 INFO L93 Difference]: Finished difference Result 4854 states and 20910 transitions. [2022-11-20 10:40:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:40:37,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:40:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:37,560 INFO L225 Difference]: With dead ends: 4854 [2022-11-20 10:40:37,560 INFO L226 Difference]: Without dead ends: 4854 [2022-11-20 10:40:37,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:40:37,560 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:37,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2022-11-20 10:40:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2022-11-20 10:40:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4845. [2022-11-20 10:40:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4809 states have (on average 4.342274901226866) internal successors, (20882), 4844 states have internal predecessors, (20882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 20882 transitions. [2022-11-20 10:40:37,665 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 20882 transitions. Word has length 14 [2022-11-20 10:40:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:37,666 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 20882 transitions. [2022-11-20 10:40:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 20882 transitions. [2022-11-20 10:40:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:37,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:37,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:37,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 10:40:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:37,867 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 162624951, now seen corresponding path program 3 times [2022-11-20 10:40:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:37,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545686891] [2022-11-20 10:40:37,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:40:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:37,869 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:37,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 10:40:38,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:40:38,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:40:38,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:38,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:38,590 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:38,797 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:40:38,797 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 21 treesize of output 25 [2022-11-20 10:40:38,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:40:39,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:39,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:40:39,161 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:40:39,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:40:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:39,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:40,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 10:40:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:43,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545686891] [2022-11-20 10:40:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545686891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:43,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:43,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 10:40:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90402506] [2022-11-20 10:40:43,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:43,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:40:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:40:43,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:40:43,504 INFO L87 Difference]: Start difference. First operand 4845 states and 20882 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:50,171 INFO L93 Difference]: Finished difference Result 8280 states and 33774 transitions. [2022-11-20 10:40:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:40:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:40:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:50,199 INFO L225 Difference]: With dead ends: 8280 [2022-11-20 10:40:50,200 INFO L226 Difference]: Without dead ends: 8280 [2022-11-20 10:40:50,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:40:50,200 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 837 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:50,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 403 Invalid, 0 Unknown, 837 Unchecked, 4.1s Time] [2022-11-20 10:40:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2022-11-20 10:40:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 5965. [2022-11-20 10:40:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5929 states have (on average 4.409006577837746) internal successors, (26141), 5964 states have internal predecessors, (26141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 26141 transitions. [2022-11-20 10:40:50,333 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 26141 transitions. Word has length 14 [2022-11-20 10:40:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:50,334 INFO L495 AbstractCegarLoop]: Abstraction has 5965 states and 26141 transitions. [2022-11-20 10:40:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 26141 transitions. [2022-11-20 10:40:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:50,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:50,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:50,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-20 10:40:50,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:50,576 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:40:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash 882267945, now seen corresponding path program 2 times [2022-11-20 10:40:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:50,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846290910] [2022-11-20 10:40:50,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:40:50,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:50,578 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:50,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 10:40:50,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:40:50,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:50,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:40:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:51,066 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 10:40:51,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 10:40:51,215 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:40:51,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:40:51,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:40:51,343 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:40:51,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:40:51,411 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:40:51,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:40:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:40:51,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:54,399 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul (_ bv4 32) c_~i_AC~0))) (let ((.cse1 (bvadd .cse4 (_ bv8 32) c_~A~0.offset)) (.cse0 (bvadd (_ bv4 32) .cse4 c_~A~0.offset)) (.cse2 (bvadd (_ bv1 32) c_~i_AC~0))) (and (or (bvule .cse0 .cse1) (forall ((~Cn~0 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (_ BitVec 32))) (or (not (bvule ~Cn~0 (_ bv1073741823 32))) (not (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (bvmul (_ bv4 32) ~Cn~0)) c_~A~0.base))) (not (bvslt .cse2 ~Cn~0))))) (forall ((~Cn~0 (_ BitVec 32))) (or (not (bvule ~Cn~0 (_ bv1073741823 32))) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (_ BitVec 32))) (let ((.cse3 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (bvmul (_ bv4 32) ~Cn~0)) c_~A~0.base))) (or (bvule .cse1 .cse3) (not (bvule .cse0 .cse3))))) (not (bvslt .cse2 ~Cn~0))))))) is different from false [2022-11-20 10:41:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:04,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:04,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846290910] [2022-11-20 10:41:04,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846290910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:04,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:04,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:41:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750568745] [2022-11-20 10:41:04,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:04,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:41:04,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:41:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=121, Unknown=3, NotChecked=22, Total=182 [2022-11-20 10:41:04,951 INFO L87 Difference]: Start difference. First operand 5965 states and 26141 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:06,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:06,195 INFO L93 Difference]: Finished difference Result 6843 states and 30303 transitions. [2022-11-20 10:41:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:41:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:41:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:06,219 INFO L225 Difference]: With dead ends: 6843 [2022-11-20 10:41:06,219 INFO L226 Difference]: Without dead ends: 6843 [2022-11-20 10:41:06,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=36, Invalid=121, Unknown=3, NotChecked=22, Total=182 [2022-11-20 10:41:06,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:06,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 486 Unchecked, 1.2s Time] [2022-11-20 10:41:06,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-11-20 10:41:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 6569. [2022-11-20 10:41:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6533 states have (on average 4.534057860094903) internal successors, (29621), 6568 states have internal predecessors, (29621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 29621 transitions. [2022-11-20 10:41:06,378 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 29621 transitions. Word has length 14 [2022-11-20 10:41:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 6569 states and 29621 transitions. [2022-11-20 10:41:06,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 29621 transitions. [2022-11-20 10:41:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:06,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:06,380 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:06,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-20 10:41:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:06,581 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 882268042, now seen corresponding path program 1 times [2022-11-20 10:41:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451701032] [2022-11-20 10:41:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:06,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:06,582 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 10:41:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:41:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:06,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:41:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:41:07,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:41:08,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:08,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451701032] [2022-11-20 10:41:08,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451701032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:08,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:08,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:41:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279392882] [2022-11-20 10:41:08,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:41:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:41:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:41:08,246 INFO L87 Difference]: Start difference. First operand 6569 states and 29621 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:11,612 INFO L93 Difference]: Finished difference Result 12572 states and 56281 transitions. [2022-11-20 10:41:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:41:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:41:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:11,734 INFO L225 Difference]: With dead ends: 12572 [2022-11-20 10:41:11,734 INFO L226 Difference]: Without dead ends: 12572 [2022-11-20 10:41:11,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:41:11,734 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 287 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:11,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 0 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 288 Invalid, 0 Unknown, 82 Unchecked, 2.9s Time] [2022-11-20 10:41:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2022-11-20 10:41:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 8602. [2022-11-20 10:41:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8566 states have (on average 4.925986458090124) internal successors, (42196), 8601 states have internal predecessors, (42196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 42196 transitions. [2022-11-20 10:41:12,025 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 42196 transitions. Word has length 14 [2022-11-20 10:41:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:12,026 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 42196 transitions. [2022-11-20 10:41:12,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 42196 transitions. [2022-11-20 10:41:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:12,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:12,027 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:12,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:12,228 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash -866687135, now seen corresponding path program 4 times [2022-11-20 10:41:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256754152] [2022-11-20 10:41:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:41:12,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:12,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:12,230 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:12,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 10:41:12,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:41:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:41:12,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:12,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:41:12,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:41:12,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:41:13,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256754152] [2022-11-20 10:41:13,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256754152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:13,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:13,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:41:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892609308] [2022-11-20 10:41:13,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:13,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:41:13,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:41:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:41:13,607 INFO L87 Difference]: Start difference. First operand 8602 states and 42196 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:17,725 INFO L93 Difference]: Finished difference Result 16607 states and 76701 transitions. [2022-11-20 10:41:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:41:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:17,799 INFO L225 Difference]: With dead ends: 16607 [2022-11-20 10:41:17,799 INFO L226 Difference]: Without dead ends: 16607 [2022-11-20 10:41:17,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:41:17,799 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 833 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 0 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 862 Invalid, 0 Unknown, 58 Unchecked, 3.8s Time] [2022-11-20 10:41:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16607 states. [2022-11-20 10:41:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16607 to 10684. [2022-11-20 10:41:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10648 states have (on average 5.072126220886552) internal successors, (54008), 10683 states have internal predecessors, (54008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 54008 transitions. [2022-11-20 10:41:18,209 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 54008 transitions. Word has length 15 [2022-11-20 10:41:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:18,209 INFO L495 AbstractCegarLoop]: Abstraction has 10684 states and 54008 transitions. [2022-11-20 10:41:18,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 54008 transitions. [2022-11-20 10:41:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:18,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:18,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:18,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 10:41:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:18,411 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1580509936, now seen corresponding path program 3 times [2022-11-20 10:41:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:18,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672659137] [2022-11-20 10:41:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:41:18,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:18,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:18,413 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:18,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 10:41:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:41:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:41:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:18,992 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:18,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:19,147 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:41:19,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:41:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:19,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:41:19,289 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:41:19,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:41:19,371 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:41:19,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:41:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:20,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:29,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672659137] [2022-11-20 10:41:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672659137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:29,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:29,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:41:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95378228] [2022-11-20 10:41:29,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:29,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:41:29,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:41:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=180, Unknown=1, NotChecked=0, Total=240 [2022-11-20 10:41:29,066 INFO L87 Difference]: Start difference. First operand 10684 states and 54008 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:31,968 INFO L93 Difference]: Finished difference Result 13061 states and 63719 transitions. [2022-11-20 10:41:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:41:31,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:32,095 INFO L225 Difference]: With dead ends: 13061 [2022-11-20 10:41:32,096 INFO L226 Difference]: Without dead ends: 13061 [2022-11-20 10:41:32,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=77, Invalid=264, Unknown=1, NotChecked=0, Total=342 [2022-11-20 10:41:32,096 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:32,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 186 Invalid, 0 Unknown, 487 Unchecked, 2.1s Time] [2022-11-20 10:41:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13061 states. [2022-11-20 10:41:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13061 to 11675. [2022-11-20 10:41:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11675 states, 11639 states have (on average 5.061517312483891) internal successors, (58911), 11674 states have internal predecessors, (58911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11675 states to 11675 states and 58911 transitions. [2022-11-20 10:41:32,423 INFO L78 Accepts]: Start accepts. Automaton has 11675 states and 58911 transitions. Word has length 15 [2022-11-20 10:41:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:32,423 INFO L495 AbstractCegarLoop]: Abstraction has 11675 states and 58911 transitions. [2022-11-20 10:41:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 11675 states and 58911 transitions. [2022-11-20 10:41:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:32,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:32,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:32,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:32,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:32,639 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1580507022, now seen corresponding path program 1 times [2022-11-20 10:41:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742690937] [2022-11-20 10:41:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:32,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:32,641 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:32,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 10:41:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:33,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:41:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:33,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742690937] [2022-11-20 10:41:33,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742690937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:33,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:33,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:41:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8629193] [2022-11-20 10:41:33,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:41:33,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:41:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:41:33,523 INFO L87 Difference]: Start difference. First operand 11675 states and 58911 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:35,976 INFO L93 Difference]: Finished difference Result 17429 states and 80814 transitions. [2022-11-20 10:41:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:41:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:36,043 INFO L225 Difference]: With dead ends: 17429 [2022-11-20 10:41:36,043 INFO L226 Difference]: Without dead ends: 17429 [2022-11-20 10:41:36,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:41:36,043 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 465 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:36,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 0 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 456 Invalid, 0 Unknown, 31 Unchecked, 2.2s Time] [2022-11-20 10:41:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2022-11-20 10:41:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 13185. [2022-11-20 10:41:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13185 states, 13149 states have (on average 4.976728268309377) internal successors, (65439), 13184 states have internal predecessors, (65439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13185 states to 13185 states and 65439 transitions. [2022-11-20 10:41:36,499 INFO L78 Accepts]: Start accepts. Automaton has 13185 states and 65439 transitions. Word has length 15 [2022-11-20 10:41:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:36,499 INFO L495 AbstractCegarLoop]: Abstraction has 13185 states and 65439 transitions. [2022-11-20 10:41:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13185 states and 65439 transitions. [2022-11-20 10:41:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:36,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:36,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:36,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-20 10:41:36,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:36,702 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1645530080, now seen corresponding path program 1 times [2022-11-20 10:41:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970584477] [2022-11-20 10:41:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:36,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:36,704 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:36,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 10:41:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:41:36,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:41:37,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:41:37,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970584477] [2022-11-20 10:41:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970584477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:41:37,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:41:37,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:41:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108492233] [2022-11-20 10:41:37,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:41:37,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:41:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:41:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:41:37,158 INFO L87 Difference]: Start difference. First operand 13185 states and 65439 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:38,472 INFO L93 Difference]: Finished difference Result 15501 states and 72518 transitions. [2022-11-20 10:41:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:41:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:38,531 INFO L225 Difference]: With dead ends: 15501 [2022-11-20 10:41:38,531 INFO L226 Difference]: Without dead ends: 15501 [2022-11-20 10:41:38,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:41:38,531 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:38,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:41:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2022-11-20 10:41:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 13091. [2022-11-20 10:41:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13091 states, 13055 states have (on average 4.981386441976254) internal successors, (65032), 13090 states have internal predecessors, (65032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13091 states to 13091 states and 65032 transitions. [2022-11-20 10:41:39,074 INFO L78 Accepts]: Start accepts. Automaton has 13091 states and 65032 transitions. Word has length 15 [2022-11-20 10:41:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 13091 states and 65032 transitions. [2022-11-20 10:41:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 13091 states and 65032 transitions. [2022-11-20 10:41:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:39,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:39,077 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:39,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-20 10:41:39,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:39,277 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:39,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1132092213, now seen corresponding path program 1 times [2022-11-20 10:41:39,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:39,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120480265] [2022-11-20 10:41:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:39,279 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:39,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 10:41:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:41:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:39,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:41:39,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:41:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:40,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:41:40,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120480265] [2022-11-20 10:41:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120480265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:40,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:40,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 10:41:40,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512713120] [2022-11-20 10:41:40,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:40,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:41:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:41:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:41:40,982 INFO L87 Difference]: Start difference. First operand 13091 states and 65032 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:43,676 INFO L93 Difference]: Finished difference Result 15726 states and 74307 transitions. [2022-11-20 10:41:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:41:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:43,739 INFO L225 Difference]: With dead ends: 15726 [2022-11-20 10:41:43,739 INFO L226 Difference]: Without dead ends: 15726 [2022-11-20 10:41:43,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:41:43,740 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:43,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 455 Invalid, 0 Unknown, 109 Unchecked, 2.5s Time] [2022-11-20 10:41:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15726 states. [2022-11-20 10:41:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15726 to 13430. [2022-11-20 10:41:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13430 states, 13394 states have (on average 4.947439151859041) internal successors, (66266), 13429 states have internal predecessors, (66266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13430 states to 13430 states and 66266 transitions. [2022-11-20 10:41:44,231 INFO L78 Accepts]: Start accepts. Automaton has 13430 states and 66266 transitions. Word has length 15 [2022-11-20 10:41:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:44,232 INFO L495 AbstractCegarLoop]: Abstraction has 13430 states and 66266 transitions. [2022-11-20 10:41:44,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13430 states and 66266 transitions. [2022-11-20 10:41:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:44,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:44,233 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:44,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:44,434 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1991201975, now seen corresponding path program 1 times [2022-11-20 10:41:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:44,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95401098] [2022-11-20 10:41:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:44,436 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:44,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 10:41:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:41:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:44,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:44,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:45,158 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:41:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:41:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:45,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:41:45,309 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:41:45,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:41:45,416 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:41:45,417 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 16 treesize of output 22 [2022-11-20 10:41:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:49,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95401098] [2022-11-20 10:41:49,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95401098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:49,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:49,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:41:49,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549619795] [2022-11-20 10:41:49,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:49,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:41:49,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:41:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:41:49,779 INFO L87 Difference]: Start difference. First operand 13430 states and 66266 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:51,793 INFO L93 Difference]: Finished difference Result 14288 states and 69487 transitions. [2022-11-20 10:41:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:41:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:41:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:51,946 INFO L225 Difference]: With dead ends: 14288 [2022-11-20 10:41:51,946 INFO L226 Difference]: Without dead ends: 14288 [2022-11-20 10:41:51,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:41:51,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:51,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 231 Invalid, 0 Unknown, 313 Unchecked, 1.6s Time] [2022-11-20 10:41:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14288 states. [2022-11-20 10:41:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14288 to 13444. [2022-11-20 10:41:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13444 states, 13408 states have (on average 4.946971957040573) internal successors, (66329), 13443 states have internal predecessors, (66329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13444 states to 13444 states and 66329 transitions. [2022-11-20 10:41:52,355 INFO L78 Accepts]: Start accepts. Automaton has 13444 states and 66329 transitions. Word has length 15 [2022-11-20 10:41:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:52,355 INFO L495 AbstractCegarLoop]: Abstraction has 13444 states and 66329 transitions. [2022-11-20 10:41:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 13444 states and 66329 transitions. [2022-11-20 10:41:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:41:52,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:52,358 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:52,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-20 10:41:52,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:52,559 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:41:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash 239005131, now seen corresponding path program 1 times [2022-11-20 10:41:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:52,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564996895] [2022-11-20 10:41:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:41:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:52,561 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:52,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 10:41:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:41:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:53,225 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:53,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:53,378 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:41:53,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:41:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:41:53,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:41:53,507 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:41:53,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:41:53,594 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:41:53,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:41:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:54,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:41:57,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564996895] [2022-11-20 10:41:57,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564996895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:57,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:57,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:41:57,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604321221] [2022-11-20 10:41:57,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:41:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:41:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:41:57,376 INFO L87 Difference]: Start difference. First operand 13444 states and 66329 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:00,543 INFO L93 Difference]: Finished difference Result 13556 states and 66568 transitions. [2022-11-20 10:42:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:42:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:42:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:00,596 INFO L225 Difference]: With dead ends: 13556 [2022-11-20 10:42:00,596 INFO L226 Difference]: Without dead ends: 13556 [2022-11-20 10:42:00,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:42:00,596 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:00,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 199 Unchecked, 2.4s Time] [2022-11-20 10:42:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13556 states. [2022-11-20 10:42:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13556 to 13444. [2022-11-20 10:42:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13444 states, 13408 states have (on average 4.946971957040573) internal successors, (66329), 13443 states have internal predecessors, (66329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13444 states to 13444 states and 66329 transitions. [2022-11-20 10:42:01,079 INFO L78 Accepts]: Start accepts. Automaton has 13444 states and 66329 transitions. Word has length 15 [2022-11-20 10:42:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:01,079 INFO L495 AbstractCegarLoop]: Abstraction has 13444 states and 66329 transitions. [2022-11-20 10:42:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 13444 states and 66329 transitions. [2022-11-20 10:42:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:42:01,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:01,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:01,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:01,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:01,282 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:42:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 138606370, now seen corresponding path program 3 times [2022-11-20 10:42:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:01,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166936995] [2022-11-20 10:42:01,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:42:01,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:01,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:01,284 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:01,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 10:42:01,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:42:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 10:42:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:01,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 10:42:01,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:42:01,829 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:42:01,829 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 21 treesize of output 25 [2022-11-20 10:42:01,872 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:42:01,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:42:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:42:02,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:42:07,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:42:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166936995] [2022-11-20 10:42:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166936995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:07,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:42:07,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:42:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738144025] [2022-11-20 10:42:07,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:42:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:42:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:42:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:42:07,665 INFO L87 Difference]: Start difference. First operand 13444 states and 66329 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:14,131 INFO L93 Difference]: Finished difference Result 17850 states and 88417 transitions. [2022-11-20 10:42:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:42:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:42:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:14,208 INFO L225 Difference]: With dead ends: 17850 [2022-11-20 10:42:14,208 INFO L226 Difference]: Without dead ends: 17850 [2022-11-20 10:42:14,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:42:14,209 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 702 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:14,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 702 Unchecked, 1.2s Time] [2022-11-20 10:42:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17850 states. [2022-11-20 10:42:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17850 to 13488. [2022-11-20 10:42:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13488 states, 13452 states have (on average 4.94157002676182) internal successors, (66474), 13487 states have internal predecessors, (66474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13488 states to 13488 states and 66474 transitions. [2022-11-20 10:42:14,603 INFO L78 Accepts]: Start accepts. Automaton has 13488 states and 66474 transitions. Word has length 15 [2022-11-20 10:42:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:14,604 INFO L495 AbstractCegarLoop]: Abstraction has 13488 states and 66474 transitions. [2022-11-20 10:42:14,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13488 states and 66474 transitions. [2022-11-20 10:42:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:42:14,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:14,606 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:14,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-20 10:42:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:14,808 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:42:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash -613833685, now seen corresponding path program 2 times [2022-11-20 10:42:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:14,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082927017] [2022-11-20 10:42:14,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:14,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:14,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:14,810 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:14,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 10:42:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:42:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:15,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:15,590 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:15,755 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:42:15,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:42:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:16,175 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 21 treesize of output 21 [2022-11-20 10:42:16,215 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 10:42:16,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 10:42:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:42:16,385 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 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:42:16,414 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 10:42:16,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:42:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:42:16,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:42:26,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:42:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082927017] [2022-11-20 10:42:26,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082927017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:26,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:42:26,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 10:42:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976602523] [2022-11-20 10:42:26,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:42:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:42:26,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:42:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=306, Unknown=2, NotChecked=0, Total=380 [2022-11-20 10:42:26,734 INFO L87 Difference]: Start difference. First operand 13488 states and 66474 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:41,632 WARN L233 SmtUtils]: Spent 8.85s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:42:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:47,889 INFO L93 Difference]: Finished difference Result 13769 states and 67085 transitions. [2022-11-20 10:42:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:42:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:42:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:47,941 INFO L225 Difference]: With dead ends: 13769 [2022-11-20 10:42:47,941 INFO L226 Difference]: Without dead ends: 13769 [2022-11-20 10:42:47,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=134, Invalid=514, Unknown=2, NotChecked=0, Total=650 [2022-11-20 10:42:47,942 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:47,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2022-11-20 10:42:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13769 states. [2022-11-20 10:42:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13769 to 13619. [2022-11-20 10:42:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13619 states, 13583 states have (on average 4.915188102775528) internal successors, (66763), 13618 states have internal predecessors, (66763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13619 states to 13619 states and 66763 transitions. [2022-11-20 10:42:48,411 INFO L78 Accepts]: Start accepts. Automaton has 13619 states and 66763 transitions. Word has length 16 [2022-11-20 10:42:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:48,412 INFO L495 AbstractCegarLoop]: Abstraction has 13619 states and 66763 transitions. [2022-11-20 10:42:48,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 13619 states and 66763 transitions. [2022-11-20 10:42:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:42:48,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:48,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:48,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:48,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:48,629 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:42:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1526740797, now seen corresponding path program 5 times [2022-11-20 10:42:48,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:48,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665616438] [2022-11-20 10:42:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:42:48,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:48,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:48,631 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:48,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 10:42:49,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:42:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:49,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 10:42:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:49,368 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:49,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:49,640 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:42:49,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:42:49,649 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 21 treesize of output 21 [2022-11-20 10:42:49,890 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:42:49,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:42:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:42:50,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:05,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:43:05,095 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 107 treesize of output 131 [2022-11-20 10:43:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:06,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665616438] [2022-11-20 10:43:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665616438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:06,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:06,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 10:43:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640100554] [2022-11-20 10:43:06,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:06,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:43:06,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:43:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:43:06,756 INFO L87 Difference]: Start difference. First operand 13619 states and 66763 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:14,237 INFO L93 Difference]: Finished difference Result 16084 states and 75038 transitions. [2022-11-20 10:43:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:43:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:14,300 INFO L225 Difference]: With dead ends: 16084 [2022-11-20 10:43:14,300 INFO L226 Difference]: Without dead ends: 16084 [2022-11-20 10:43:14,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:43:14,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:14,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 290 Invalid, 0 Unknown, 975 Unchecked, 3.3s Time] [2022-11-20 10:43:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16084 states. [2022-11-20 10:43:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16084 to 13812. [2022-11-20 10:43:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13812 states, 13776 states have (on average 4.890316492450639) internal successors, (67369), 13811 states have internal predecessors, (67369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13812 states to 13812 states and 67369 transitions. [2022-11-20 10:43:14,782 INFO L78 Accepts]: Start accepts. Automaton has 13812 states and 67369 transitions. Word has length 16 [2022-11-20 10:43:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:14,782 INFO L495 AbstractCegarLoop]: Abstraction has 13812 states and 67369 transitions. [2022-11-20 10:43:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 13812 states and 67369 transitions. [2022-11-20 10:43:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:14,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:14,785 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:14,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 10:43:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:14,986 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1410767646, now seen corresponding path program 3 times [2022-11-20 10:43:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:14,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786230529] [2022-11-20 10:43:14,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:43:14,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:14,988 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:14,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 10:43:15,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:43:15,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:43:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:15,573 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:15,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:15,689 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 13 treesize of output 9 [2022-11-20 10:43:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:15,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:16,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786230529] [2022-11-20 10:43:16,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786230529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:16,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:16,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:16,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347505163] [2022-11-20 10:43:16,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:16,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:16,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:16,660 INFO L87 Difference]: Start difference. First operand 13812 states and 67369 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:22,786 INFO L93 Difference]: Finished difference Result 22183 states and 101637 transitions. [2022-11-20 10:43:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:43:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:23,001 INFO L225 Difference]: With dead ends: 22183 [2022-11-20 10:43:23,001 INFO L226 Difference]: Without dead ends: 22183 [2022-11-20 10:43:23,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:23,001 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 298 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:23,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 0 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-20 10:43:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22183 states. [2022-11-20 10:43:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22183 to 12017. [2022-11-20 10:43:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12017 states, 11981 states have (on average 4.824555546281613) internal successors, (57803), 12016 states have internal predecessors, (57803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12017 states to 12017 states and 57803 transitions. [2022-11-20 10:43:23,489 INFO L78 Accepts]: Start accepts. Automaton has 12017 states and 57803 transitions. Word has length 16 [2022-11-20 10:43:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:23,489 INFO L495 AbstractCegarLoop]: Abstraction has 12017 states and 57803 transitions. [2022-11-20 10:43:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 12017 states and 57803 transitions. [2022-11-20 10:43:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:23,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:23,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:23,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:23,703 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 486107576, now seen corresponding path program 4 times [2022-11-20 10:43:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840220981] [2022-11-20 10:43:23,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:43:23,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:23,705 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:23,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 10:43:24,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:43:24,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:43:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:24,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:24,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:24,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:43:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:24,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:25,143 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840220981] [2022-11-20 10:43:25,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840220981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:25,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:25,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081235880] [2022-11-20 10:43:25,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:25,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:25,144 INFO L87 Difference]: Start difference. First operand 12017 states and 57803 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:30,449 INFO L93 Difference]: Finished difference Result 15836 states and 71736 transitions. [2022-11-20 10:43:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:43:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:30,508 INFO L225 Difference]: With dead ends: 15836 [2022-11-20 10:43:30,508 INFO L226 Difference]: Without dead ends: 15751 [2022-11-20 10:43:30,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:30,508 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 283 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:30,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 0 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 10:43:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2022-11-20 10:43:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 13177. [2022-11-20 10:43:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13177 states, 13141 states have (on average 4.791948862339243) internal successors, (62971), 13176 states have internal predecessors, (62971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13177 states to 13177 states and 62971 transitions. [2022-11-20 10:43:31,019 INFO L78 Accepts]: Start accepts. Automaton has 13177 states and 62971 transitions. Word has length 16 [2022-11-20 10:43:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:31,019 INFO L495 AbstractCegarLoop]: Abstraction has 13177 states and 62971 transitions. [2022-11-20 10:43:31,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 13177 states and 62971 transitions. [2022-11-20 10:43:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:31,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:31,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:31,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:31,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:31,223 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash 486104662, now seen corresponding path program 2 times [2022-11-20 10:43:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:31,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147043019] [2022-11-20 10:43:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:43:31,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:31,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:31,226 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 10:43:31,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:43:31,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:43:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:31,763 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 10:43:31,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 10:43:31,915 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:43:31,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:43:32,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:32,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:43:32,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:43:32,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:43:32,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 10:43:32,154 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 18 [2022-11-20 10:43:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:32,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:36,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:36,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147043019] [2022-11-20 10:43:36,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147043019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:36,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:36,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-20 10:43:36,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037220295] [2022-11-20 10:43:36,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:36,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:43:36,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:43:36,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=218, Unknown=1, NotChecked=0, Total=272 [2022-11-20 10:43:36,917 INFO L87 Difference]: Start difference. First operand 13177 states and 62971 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:42,087 INFO L93 Difference]: Finished difference Result 15631 states and 70392 transitions. [2022-11-20 10:43:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:43:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:42,143 INFO L225 Difference]: With dead ends: 15631 [2022-11-20 10:43:42,143 INFO L226 Difference]: Without dead ends: 15631 [2022-11-20 10:43:42,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=90, Invalid=329, Unknown=1, NotChecked=0, Total=420 [2022-11-20 10:43:42,144 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 219 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:42,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 0 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1208 Invalid, 0 Unknown, 469 Unchecked, 4.7s Time] [2022-11-20 10:43:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2022-11-20 10:43:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 11976. [2022-11-20 10:43:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11976 states, 11940 states have (on average 4.681407035175879) internal successors, (55896), 11975 states have internal predecessors, (55896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11976 states to 11976 states and 55896 transitions. [2022-11-20 10:43:42,580 INFO L78 Accepts]: Start accepts. Automaton has 11976 states and 55896 transitions. Word has length 16 [2022-11-20 10:43:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:42,580 INFO L495 AbstractCegarLoop]: Abstraction has 11976 states and 55896 transitions. [2022-11-20 10:43:42,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 11976 states and 55896 transitions. [2022-11-20 10:43:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:42,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:42,583 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:42,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:42,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:42,784 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1597427797, now seen corresponding path program 1 times [2022-11-20 10:43:42,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:42,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830452091] [2022-11-20 10:43:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:42,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:42,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:42,786 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:42,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 10:43:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:43:43,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:43,425 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:43,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:43,593 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:43:43,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:43:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:43,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:43:43,766 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:43:43,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:43:43,888 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:43:43,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:43:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:44,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:46,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:46,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830452091] [2022-11-20 10:43:46,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830452091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:46,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:46,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:43:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193392289] [2022-11-20 10:43:46,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:43:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:43:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:43:46,079 INFO L87 Difference]: Start difference. First operand 11976 states and 55896 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:47,024 INFO L93 Difference]: Finished difference Result 12043 states and 56105 transitions. [2022-11-20 10:43:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:43:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:47,066 INFO L225 Difference]: With dead ends: 12043 [2022-11-20 10:43:47,066 INFO L226 Difference]: Without dead ends: 12043 [2022-11-20 10:43:47,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:43:47,066 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:47,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 235 Unchecked, 0.5s Time] [2022-11-20 10:43:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12043 states. [2022-11-20 10:43:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12043 to 11979. [2022-11-20 10:43:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11979 states, 11943 states have (on average 4.680817215105082) internal successors, (55903), 11978 states have internal predecessors, (55903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11979 states to 11979 states and 55903 transitions. [2022-11-20 10:43:47,312 INFO L78 Accepts]: Start accepts. Automaton has 11979 states and 55903 transitions. Word has length 16 [2022-11-20 10:43:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:47,313 INFO L495 AbstractCegarLoop]: Abstraction has 11979 states and 55903 transitions. [2022-11-20 10:43:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11979 states and 55903 transitions. [2022-11-20 10:43:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:47,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:47,315 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:47,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:47,516 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1597711354, now seen corresponding path program 1 times [2022-11-20 10:43:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499866853] [2022-11-20 10:43:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:47,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:47,517 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:47,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 10:43:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:47,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 10:43:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:48,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:48,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:48,424 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:43:48,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:43:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:43:48,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:43:48,591 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:43:48,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:43:48,706 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:43:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:43:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:49,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:43:50,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499866853] [2022-11-20 10:43:50,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499866853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:50,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:50,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 10:43:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523190212] [2022-11-20 10:43:50,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:50,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:43:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:43:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:43:50,852 INFO L87 Difference]: Start difference. First operand 11979 states and 55903 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:51,737 INFO L93 Difference]: Finished difference Result 12079 states and 56338 transitions. [2022-11-20 10:43:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:43:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:43:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:51,780 INFO L225 Difference]: With dead ends: 12079 [2022-11-20 10:43:51,780 INFO L226 Difference]: Without dead ends: 12079 [2022-11-20 10:43:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:43:51,780 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:51,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 169 Unchecked, 0.6s Time] [2022-11-20 10:43:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12079 states. [2022-11-20 10:43:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12079 to 11994. [2022-11-20 10:43:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11994 states, 11958 states have (on average 4.681552099013213) internal successors, (55982), 11993 states have internal predecessors, (55982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11994 states to 11994 states and 55982 transitions. [2022-11-20 10:43:52,246 INFO L78 Accepts]: Start accepts. Automaton has 11994 states and 55982 transitions. Word has length 16 [2022-11-20 10:43:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:52,246 INFO L495 AbstractCegarLoop]: Abstraction has 11994 states and 55982 transitions. [2022-11-20 10:43:52,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 11994 states and 55982 transitions. [2022-11-20 10:43:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:43:52,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:52,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:52,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-20 10:43:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:52,452 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:43:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash -258637701, now seen corresponding path program 1 times [2022-11-20 10:43:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975730567] [2022-11-20 10:43:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:43:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:52,454 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:52,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 10:43:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:43:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:52,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:43:53,082 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:43:53,082 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 21 treesize of output 25 [2022-11-20 10:43:53,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:43:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:43:53,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:43:54,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:54,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975730567] [2022-11-20 10:43:54,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975730567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:54,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:54,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 10:43:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612365589] [2022-11-20 10:43:54,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:43:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:43:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:43:54,800 INFO L87 Difference]: Start difference. First operand 11994 states and 55982 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:02,048 INFO L93 Difference]: Finished difference Result 18009 states and 77058 transitions. [2022-11-20 10:44:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:44:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:44:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:02,116 INFO L225 Difference]: With dead ends: 18009 [2022-11-20 10:44:02,117 INFO L226 Difference]: Without dead ends: 18009 [2022-11-20 10:44:02,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:44:02,117 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 401 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 0 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 747 Invalid, 0 Unknown, 500 Unchecked, 4.5s Time] [2022-11-20 10:44:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2022-11-20 10:44:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 13635. [2022-11-20 10:44:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13635 states, 13599 states have (on average 4.622472240605927) internal successors, (62861), 13634 states have internal predecessors, (62861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13635 states to 13635 states and 62861 transitions. [2022-11-20 10:44:02,623 INFO L78 Accepts]: Start accepts. Automaton has 13635 states and 62861 transitions. Word has length 16 [2022-11-20 10:44:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:02,623 INFO L495 AbstractCegarLoop]: Abstraction has 13635 states and 62861 transitions. [2022-11-20 10:44:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13635 states and 62861 transitions. [2022-11-20 10:44:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:44:02,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:02,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:02,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-20 10:44:02,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:02,827 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:44:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash -258840875, now seen corresponding path program 1 times [2022-11-20 10:44:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:02,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676975827] [2022-11-20 10:44:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:02,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:02,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:02,829 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:02,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 10:44:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:44:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:03,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:03,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:03,678 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:44:03,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:44:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:44:03,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:44:03,819 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:44:03,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:44:04,009 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:44:04,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:44:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:44:04,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:44:07,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:07,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676975827] [2022-11-20 10:44:07,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676975827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:07,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:07,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:44:07,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230938952] [2022-11-20 10:44:07,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:07,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:44:07,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:44:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:07,350 INFO L87 Difference]: Start difference. First operand 13635 states and 62861 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:10,756 INFO L93 Difference]: Finished difference Result 15176 states and 68352 transitions. [2022-11-20 10:44:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:44:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:44:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:10,809 INFO L225 Difference]: With dead ends: 15176 [2022-11-20 10:44:10,809 INFO L226 Difference]: Without dead ends: 15176 [2022-11-20 10:44:10,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:44:10,810 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:10,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 216 Unchecked, 2.7s Time] [2022-11-20 10:44:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15176 states. [2022-11-20 10:44:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15176 to 13655. [2022-11-20 10:44:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13655 states, 13619 states have (on average 4.620016153902636) internal successors, (62920), 13654 states have internal predecessors, (62920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:11,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13655 states to 13655 states and 62920 transitions. [2022-11-20 10:44:11,116 INFO L78 Accepts]: Start accepts. Automaton has 13655 states and 62920 transitions. Word has length 16 [2022-11-20 10:44:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:11,117 INFO L495 AbstractCegarLoop]: Abstraction has 13655 states and 62920 transitions. [2022-11-20 10:44:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13655 states and 62920 transitions. [2022-11-20 10:44:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:44:11,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:11,119 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:11,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-20 10:44:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:11,320 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:44:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2017408347, now seen corresponding path program 2 times [2022-11-20 10:44:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:11,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287928087] [2022-11-20 10:44:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:11,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:11,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:11,322 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:11,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 10:44:11,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:44:11,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:11,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:44:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:11,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:11,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:11,989 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:44:11,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:44:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:44:12,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:44:12,134 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:44:12,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:44:12,339 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:44:12,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:44:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:44:12,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:44:12,901 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:12,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287928087] [2022-11-20 10:44:12,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287928087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:12,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:44:12,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:44:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525248128] [2022-11-20 10:44:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:12,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:44:12,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:44:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:44:12,902 INFO L87 Difference]: Start difference. First operand 13655 states and 62920 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:13,586 INFO L93 Difference]: Finished difference Result 13711 states and 63199 transitions. [2022-11-20 10:44:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:44:13,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:44:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:13,636 INFO L225 Difference]: With dead ends: 13711 [2022-11-20 10:44:13,636 INFO L226 Difference]: Without dead ends: 13711 [2022-11-20 10:44:13,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:44:13,636 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:13,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2022-11-20 10:44:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2022-11-20 10:44:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13659. [2022-11-20 10:44:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13659 states, 13623 states have (on average 4.620054319900169) internal successors, (62939), 13658 states have internal predecessors, (62939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 62939 transitions. [2022-11-20 10:44:14,106 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 62939 transitions. Word has length 16 [2022-11-20 10:44:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:14,107 INFO L495 AbstractCegarLoop]: Abstraction has 13659 states and 62939 transitions. [2022-11-20 10:44:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 62939 transitions. [2022-11-20 10:44:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:44:14,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:14,110 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:14,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:14,313 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:44:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2017599927, now seen corresponding path program 3 times [2022-11-20 10:44:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503870929] [2022-11-20 10:44:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:14,315 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:14,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 10:44:14,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:44:14,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:44:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:14,807 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:14,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:14,971 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:44:14,972 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:44:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:44:15,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:44:15,105 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:44:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:44:15,310 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:44:15,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:44:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:44:15,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:44:15,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:15,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503870929] [2022-11-20 10:44:15,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503870929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:15,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:44:15,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:44:15,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857288575] [2022-11-20 10:44:15,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:15,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:44:15,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:15,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:44:15,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:44:15,845 INFO L87 Difference]: Start difference. First operand 13659 states and 62939 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:16,499 INFO L93 Difference]: Finished difference Result 13719 states and 63237 transitions. [2022-11-20 10:44:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:44:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:44:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:16,552 INFO L225 Difference]: With dead ends: 13719 [2022-11-20 10:44:16,552 INFO L226 Difference]: Without dead ends: 13719 [2022-11-20 10:44:16,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:44:16,553 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:16,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 70 Unchecked, 0.6s Time] [2022-11-20 10:44:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13719 states. [2022-11-20 10:44:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13719 to 13659. [2022-11-20 10:44:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13659 states, 13623 states have (on average 4.620054319900169) internal successors, (62939), 13658 states have internal predecessors, (62939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13659 states to 13659 states and 62939 transitions. [2022-11-20 10:44:17,027 INFO L78 Accepts]: Start accepts. Automaton has 13659 states and 62939 transitions. Word has length 16 [2022-11-20 10:44:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:17,027 INFO L495 AbstractCegarLoop]: Abstraction has 13659 states and 62939 transitions. [2022-11-20 10:44:17,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 13659 states and 62939 transitions. [2022-11-20 10:44:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:44:17,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:17,032 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:17,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:17,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:17,245 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:44:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2020925607, now seen corresponding path program 4 times [2022-11-20 10:44:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:17,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571070191] [2022-11-20 10:44:17,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:44:17,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:17,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:17,247 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:17,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 10:44:17,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:44:17,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:17,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:44:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:17,900 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:17,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:18,072 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:44:18,073 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:44:18,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:44:18,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:44:18,276 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:44:18,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:44:18,376 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 10:44:18,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 10:44:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:19,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:22,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:22,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571070191] [2022-11-20 10:44:22,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571070191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:22,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:22,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:44:22,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671987044] [2022-11-20 10:44:22,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:22,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:44:22,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:22,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:44:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:44:22,360 INFO L87 Difference]: Start difference. First operand 13659 states and 62939 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:25,428 INFO L93 Difference]: Finished difference Result 14973 states and 67829 transitions. [2022-11-20 10:44:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:44:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:44:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:25,482 INFO L225 Difference]: With dead ends: 14973 [2022-11-20 10:44:25,482 INFO L226 Difference]: Without dead ends: 14973 [2022-11-20 10:44:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:44:25,483 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 285 Invalid, 0 Unknown, 388 Unchecked, 2.3s Time] [2022-11-20 10:44:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14973 states. [2022-11-20 10:44:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14973 to 13643. [2022-11-20 10:44:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13643 states, 13607 states have (on average 4.622179760417432) internal successors, (62894), 13642 states have internal predecessors, (62894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13643 states to 13643 states and 62894 transitions. [2022-11-20 10:44:25,898 INFO L78 Accepts]: Start accepts. Automaton has 13643 states and 62894 transitions. Word has length 16 [2022-11-20 10:44:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:25,898 INFO L495 AbstractCegarLoop]: Abstraction has 13643 states and 62894 transitions. [2022-11-20 10:44:25,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13643 states and 62894 transitions. [2022-11-20 10:44:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:44:25,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:25,902 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1] [2022-11-20 10:44:25,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-20 10:44:26,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:26,103 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-20 10:44:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2059007891, now seen corresponding path program 1 times [2022-11-20 10:44:26,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689207758] [2022-11-20 10:44:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:26,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:26,104 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:26,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b50a5342-866d-4403-95d1-d519bc5dea1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 10:44:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:26,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:44:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:26,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:44:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:27,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:33,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689207758] [2022-11-20 10:44:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689207758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:33,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:33,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-20 10:44:33,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009776517] [2022-11-20 10:44:33,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:33,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:44:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:44:33,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:44:33,966 INFO L87 Difference]: Start difference. First operand 13643 states and 62894 transitions. Second operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:50,869 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:44:53,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:44:55,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:44:57,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:44:59,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:01,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:03,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:05,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:07,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:09,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:11,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:13,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:15,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:17,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:27,714 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:34,699 WARN L233 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:45:36,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:38,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:40,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:42,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:44,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:46,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:48,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:50,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:52,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:54,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:56,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:45:58,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:46:00,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:46:07,278 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)