./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:29,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:29,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:29,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:29,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:29,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:29,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:29,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:29,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:29,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:29,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:29,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:29,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:29,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:29,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:29,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:29,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:29,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:29,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:29,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:29,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:29,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:29,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:29,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:29,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:29,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:29,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:29,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:29,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:29,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:29,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:29,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:29,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:29,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:29,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:29,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:29,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:29,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:29,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:29,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:29,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:29,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 09:27:29,295 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:29,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:29,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:29,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:29,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:29,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:29,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:29,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:29,298 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:29,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:29,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:29,299 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:29,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:29,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:29,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:29,300 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:27:29,300 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:27:29,300 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:27:29,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:29,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:27:29,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:29,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:29,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:29,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:29,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:29,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:29,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:29,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:29,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:29,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:29,303 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-20 09:27:29,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:29,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:29,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:29,667 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:29,668 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:29,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-20 09:27:32,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:32,947 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:32,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-20 09:27:32,960 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/9df153798/cb9bb092f0cc44cd84ced4a2179739a5/FLAGd4a9b77aa [2022-11-20 09:27:32,980 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/9df153798/cb9bb092f0cc44cd84ced4a2179739a5 [2022-11-20 09:27:32,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:32,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:32,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:32,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:32,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:32,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:32" (1/1) ... [2022-11-20 09:27:32,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0e3149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:32, skipping insertion in model container [2022-11-20 09:27:32,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:32" (1/1) ... [2022-11-20 09:27:33,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:33,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:33,234 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-20 09:27:33,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:33,260 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 09:27:33,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@413c6bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:33, skipping insertion in model container [2022-11-20 09:27:33,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:33,263 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 09:27:33,264 INFO L158 Benchmark]: Toolchain (without parser) took 278.21ms. Allocated memory is still 132.1MB. Free memory was 101.1MB in the beginning and 90.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:27:33,264 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 132.1MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:27:33,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.70ms. Allocated memory is still 132.1MB. Free memory was 100.5MB in the beginning and 90.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 09:27:33,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 132.1MB. Free memory is still 74.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.70ms. Allocated memory is still 132.1MB. Free memory was 100.5MB in the beginning and 90.7MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:35,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:35,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:35,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:35,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:35,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:35,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:35,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:35,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:35,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:35,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:35,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:35,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:35,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:35,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:35,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:35,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:35,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:35,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:35,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:35,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:35,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:35,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:35,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:35,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:35,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:35,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:35,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:35,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:35,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:35,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:35,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:35,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:35,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:35,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:35,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:35,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:35,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:35,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:35,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:35,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:35,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 09:27:35,833 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:35,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:35,835 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:35,835 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:35,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:35,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:35,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:35,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:35,838 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:35,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:35,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:35,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:35,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:35,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:35,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:35,842 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:27:35,842 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:27:35,842 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:27:35,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:35,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:27:35,843 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 09:27:35,843 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 09:27:35,843 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:35,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:35,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:35,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:35,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:35,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:35,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:35,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:35,846 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 09:27:35,846 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 09:27:35,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 09:27:35,847 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-20 09:27:36,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:36,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:36,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:36,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:36,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:36,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-20 09:27:39,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:39,694 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:39,694 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-20 09:27:39,715 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/ce4341967/003d9472182a46cc843355e14a6d483b/FLAG145b17dcd [2022-11-20 09:27:39,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/data/ce4341967/003d9472182a46cc843355e14a6d483b [2022-11-20 09:27:39,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:39,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:39,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:39,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:39,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:39,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:39" (1/1) ... [2022-11-20 09:27:39,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677fff32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:39, skipping insertion in model container [2022-11-20 09:27:39,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:39" (1/1) ... [2022-11-20 09:27:39,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:39,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:40,056 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-20 09:27:40,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:40,121 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 09:27:40,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:40,166 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-20 09:27:40,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:40,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:40,218 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_05add1c5-bc95-42e1-8048-ba6fbb38a26a/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-20 09:27:40,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:40,252 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:40,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40 WrapperNode [2022-11-20 09:27:40,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:40,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:40,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:40,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:40,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,313 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 395 [2022-11-20 09:27:40,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:40,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:40,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:40,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:40,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,418 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:40,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:40,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:40,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:40,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (1/1) ... [2022-11-20 09:27:40,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:40,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:40,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:40,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:27:40,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:27:40,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:27:40,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:27:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:27:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:27:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-20 09:27:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:40,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 09:27:40,542 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:27:40,699 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:40,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:42,221 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:42,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:42,237 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 09:27:42,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:42 BoogieIcfgContainer [2022-11-20 09:27:42,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:42,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:42,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:42,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:42,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:39" (1/3) ... [2022-11-20 09:27:42,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d92ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:42, skipping insertion in model container [2022-11-20 09:27:42,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:40" (2/3) ... [2022-11-20 09:27:42,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9d92ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:42, skipping insertion in model container [2022-11-20 09:27:42,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:42" (3/3) ... [2022-11-20 09:27:42,254 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2022-11-20 09:27:42,274 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:42,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2022-11-20 09:27:42,275 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:42,496 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 09:27:42,556 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 09:27:42,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-20 09:27:42,594 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-20 09:27:42,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 559 places, 590 transitions, 1204 flow [2022-11-20 09:27:42,882 INFO L130 PetriNetUnfolder]: 41/587 cut-off events. [2022-11-20 09:27:42,882 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:27:42,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 587 events. 41/587 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1032 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-11-20 09:27:42,907 INFO L119 LiptonReduction]: Number of co-enabled transitions 32370 [2022-11-20 09:29:24,826 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 09:29:31,661 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 174 DAG size of output: 173 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 09:29:33,761 INFO L134 LiptonReduction]: Checked pairs total: 53242 [2022-11-20 09:29:33,761 INFO L136 LiptonReduction]: Total number of compositions: 719 [2022-11-20 09:29:33,769 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 107 transitions, 238 flow [2022-11-20 09:29:35,159 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:35,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:29:35,203 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;@736f4e0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:29:35,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2022-11-20 09:29:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:29:35,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:35,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:29:35,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:29:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash 73114, now seen corresponding path program 1 times [2022-11-20 09:29:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:35,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826914784] [2022-11-20 09:29:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:35,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:35,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:29:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 09:29:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:29:35,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:35,816 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:29:35,817 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:29:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:35,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:29:35,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826914784] [2022-11-20 09:29:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826914784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:35,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:35,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:29:35,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599114123] [2022-11-20 09:29:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:35,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:35,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:36,036 INFO L87 Difference]: Start difference. First operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 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 09:29:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:37,421 INFO L93 Difference]: Finished difference Result 16781 states and 61213 transitions. [2022-11-20 09:29:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:37,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:29:37,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:37,737 INFO L225 Difference]: With dead ends: 16781 [2022-11-20 09:29:37,737 INFO L226 Difference]: Without dead ends: 16781 [2022-11-20 09:29:37,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:37,742 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:37,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:29:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16781 states. [2022-11-20 09:29:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16781 to 16781. [2022-11-20 09:29:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16781 states, 11591 states have (on average 5.281080148390993) internal successors, (61213), 16780 states have internal predecessors, (61213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16781 states to 16781 states and 61213 transitions. [2022-11-20 09:29:38,771 INFO L78 Accepts]: Start accepts. Automaton has 16781 states and 61213 transitions. Word has length 2 [2022-11-20 09:29:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:38,772 INFO L495 AbstractCegarLoop]: Abstraction has 16781 states and 61213 transitions. [2022-11-20 09:29:38,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 16781 states and 61213 transitions. [2022-11-20 09:29:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:29:38,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:38,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:29:39,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:39,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:39,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:29:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 73115, now seen corresponding path program 1 times [2022-11-20 09:29:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:39,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789689162] [2022-11-20 09:29:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:39,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:39,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:29:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 09:29:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:29:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:39,604 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:39,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:39,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:29:39,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789689162] [2022-11-20 09:29:39,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789689162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:39,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:39,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:29:39,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840615714] [2022-11-20 09:29:39,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:39,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:39,692 INFO L87 Difference]: Start difference. First operand 16781 states and 61213 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:41,039 INFO L93 Difference]: Finished difference Result 16782 states and 61214 transitions. [2022-11-20 09:29:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 09:29:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:41,262 INFO L225 Difference]: With dead ends: 16782 [2022-11-20 09:29:41,262 INFO L226 Difference]: Without dead ends: 16782 [2022-11-20 09:29:41,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:41,268 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:41,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:29:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16782 states. [2022-11-20 09:29:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16782 to 16782. [2022-11-20 09:29:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16782 states, 11592 states have (on average 5.280710835058661) internal successors, (61214), 16781 states have internal predecessors, (61214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16782 states to 16782 states and 61214 transitions. [2022-11-20 09:29:42,205 INFO L78 Accepts]: Start accepts. Automaton has 16782 states and 61214 transitions. Word has length 2 [2022-11-20 09:29:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:42,205 INFO L495 AbstractCegarLoop]: Abstraction has 16782 states and 61214 transitions. [2022-11-20 09:29:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:42,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16782 states and 61214 transitions. [2022-11-20 09:29:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:29:42,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:42,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:29:42,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:42,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:42,419 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:29:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2281338, now seen corresponding path program 1 times [2022-11-20 09:29:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:42,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597212230] [2022-11-20 09:29:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:42,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:42,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:42,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:29:42,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 09:29:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:29:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:42,778 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:42,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:42,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:43,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:43,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597212230] [2022-11-20 09:29:43,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597212230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:43,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:43,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 09:29:43,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763188321] [2022-11-20 09:29:43,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:43,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:29:43,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:29:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:29:43,234 INFO L87 Difference]: Start difference. First operand 16782 states and 61214 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:47,498 INFO L93 Difference]: Finished difference Result 16789 states and 61228 transitions. [2022-11-20 09:29:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:29:47,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:29:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:47,748 INFO L225 Difference]: With dead ends: 16789 [2022-11-20 09:29:47,754 INFO L226 Difference]: Without dead ends: 16789 [2022-11-20 09:29:47,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:29:47,756 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:47,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 09:29:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2022-11-20 09:29:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 16789. [2022-11-20 09:29:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16789 states, 11599 states have (on average 5.278730925079748) internal successors, (61228), 16788 states have internal predecessors, (61228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16789 states to 16789 states and 61228 transitions. [2022-11-20 09:29:48,590 INFO L78 Accepts]: Start accepts. Automaton has 16789 states and 61228 transitions. Word has length 3 [2022-11-20 09:29:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:48,591 INFO L495 AbstractCegarLoop]: Abstraction has 16789 states and 61228 transitions. [2022-11-20 09:29:48,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16789 states and 61228 transitions. [2022-11-20 09:29:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:29:48,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:48,593 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 09:29:48,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:48,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:48,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:29:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash -734637884, now seen corresponding path program 1 times [2022-11-20 09:29:48,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:48,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65950054] [2022-11-20 09:29:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:48,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:48,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:29:48,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 09:29:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:29:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:49,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 09:29:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:49,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:49,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65950054] [2022-11-20 09:29:49,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65950054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:49,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:49,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 09:29:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155869906] [2022-11-20 09:29:49,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:29:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:29:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:29:49,694 INFO L87 Difference]: Start difference. First operand 16789 states and 61228 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:51,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:29:52,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:29:56,464 WARN L539 Checker$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 09:29:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:59,783 INFO L93 Difference]: Finished difference Result 16802 states and 61252 transitions. [2022-11-20 09:29:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:29:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 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 6 [2022-11-20 09:29:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:59,899 INFO L225 Difference]: With dead ends: 16802 [2022-11-20 09:29:59,900 INFO L226 Difference]: Without dead ends: 16802 [2022-11-20 09:29:59,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:29:59,901 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:59,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-20 09:29:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16802 states. [2022-11-20 09:30:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16802 to 16799. [2022-11-20 09:30:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16799 states, 11609 states have (on average 5.275906624170902) internal successors, (61248), 16798 states have internal predecessors, (61248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16799 states to 16799 states and 61248 transitions. [2022-11-20 09:30:00,718 INFO L78 Accepts]: Start accepts. Automaton has 16799 states and 61248 transitions. Word has length 6 [2022-11-20 09:30:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:00,719 INFO L495 AbstractCegarLoop]: Abstraction has 16799 states and 61248 transitions. [2022-11-20 09:30:00,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16799 states and 61248 transitions. [2022-11-20 09:30:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:00,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:00,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:00,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:00,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:00,933 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash -734551468, now seen corresponding path program 1 times [2022-11-20 09:30:00,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:00,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508948168] [2022-11-20 09:30:00,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:00,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:00,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 09:30:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:30:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:30:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:01,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:01,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:01,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508948168] [2022-11-20 09:30:01,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508948168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:01,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358478219] [2022-11-20 09:30:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:01,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:30:01,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:30:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:01,090 INFO L87 Difference]: Start difference. First operand 16799 states and 61248 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:01,833 INFO L93 Difference]: Finished difference Result 16796 states and 61245 transitions. [2022-11-20 09:30:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:30:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 09:30:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:01,963 INFO L225 Difference]: With dead ends: 16796 [2022-11-20 09:30:01,963 INFO L226 Difference]: Without dead ends: 16796 [2022-11-20 09:30:01,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:30:01,969 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:01,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:30:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16796 states. [2022-11-20 09:30:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16796 to 16796. [2022-11-20 09:30:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16796 states, 11609 states have (on average 5.275648203979671) internal successors, (61245), 16795 states have internal predecessors, (61245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16796 states to 16796 states and 61245 transitions. [2022-11-20 09:30:03,225 INFO L78 Accepts]: Start accepts. Automaton has 16796 states and 61245 transitions. Word has length 6 [2022-11-20 09:30:03,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:03,226 INFO L495 AbstractCegarLoop]: Abstraction has 16796 states and 61245 transitions. [2022-11-20 09:30:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16796 states and 61245 transitions. [2022-11-20 09:30:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:30:03,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:03,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:30:03,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:03,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:03,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash -734551467, now seen corresponding path program 1 times [2022-11-20 09:30:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90704452] [2022-11-20 09:30:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:03,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:03,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:03,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 09:30:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:30:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:03,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:03,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:03,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:03,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90704452] [2022-11-20 09:30:03,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90704452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:03,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:03,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:30:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661075266] [2022-11-20 09:30:03,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:03,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:03,681 INFO L87 Difference]: Start difference. First operand 16796 states and 61245 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 09:30:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:04,653 INFO L93 Difference]: Finished difference Result 16797 states and 61247 transitions. [2022-11-20 09:30:04,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:04,655 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 09:30:04,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:04,757 INFO L225 Difference]: With dead ends: 16797 [2022-11-20 09:30:04,757 INFO L226 Difference]: Without dead ends: 16797 [2022-11-20 09:30:04,757 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 09:30:04,758 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:04,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 7 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:30:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16797 states. [2022-11-20 09:30:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16797 to 16797. [2022-11-20 09:30:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16797 states, 11610 states have (on average 5.275366063738157) internal successors, (61247), 16796 states have internal predecessors, (61247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16797 states to 16797 states and 61247 transitions. [2022-11-20 09:30:05,673 INFO L78 Accepts]: Start accepts. Automaton has 16797 states and 61247 transitions. Word has length 6 [2022-11-20 09:30:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:05,674 INFO L495 AbstractCegarLoop]: Abstraction has 16797 states and 61247 transitions. [2022-11-20 09:30:05,674 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 09:30:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 16797 states and 61247 transitions. [2022-11-20 09:30:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:30:05,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:05,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:05,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:05,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:05,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1296246459, now seen corresponding path program 1 times [2022-11-20 09:30:05,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:05,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742195713] [2022-11-20 09:30:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:05,899 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:05,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 09:30:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:30:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:06,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:30:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:06,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:06,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742195713] [2022-11-20 09:30:06,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742195713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:06,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:06,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:30:06,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782803423] [2022-11-20 09:30:06,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:06,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:30:06,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:30:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:30:06,485 INFO L87 Difference]: Start difference. First operand 16797 states and 61247 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:08,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:10,841 WARN L539 Checker$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 09:30:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:12,712 INFO L93 Difference]: Finished difference Result 16803 states and 61261 transitions. [2022-11-20 09:30:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:30:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:30:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:12,823 INFO L225 Difference]: With dead ends: 16803 [2022-11-20 09:30:12,823 INFO L226 Difference]: Without dead ends: 16803 [2022-11-20 09:30:12,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:12,824 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 252 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:12,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 9 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 286 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-20 09:30:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16803 states. [2022-11-20 09:30:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16803 to 16803. [2022-11-20 09:30:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 11616 states have (on average 5.2738464187327825) internal successors, (61261), 16802 states have internal predecessors, (61261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 61261 transitions. [2022-11-20 09:30:13,764 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 61261 transitions. Word has length 7 [2022-11-20 09:30:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:13,765 INFO L495 AbstractCegarLoop]: Abstraction has 16803 states and 61261 transitions. [2022-11-20 09:30:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 61261 transitions. [2022-11-20 09:30:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:30:13,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:13,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:13,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:13,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:13,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1528753865, now seen corresponding path program 1 times [2022-11-20 09:30:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:13,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189161690] [2022-11-20 09:30:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:13,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:13,983 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:14,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 09:30:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:30:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:14,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:14,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189161690] [2022-11-20 09:30:14,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189161690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:14,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:14,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 09:30:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095192030] [2022-11-20 09:30:14,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:14,531 INFO L87 Difference]: Start difference. First operand 16803 states and 61261 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:17,097 INFO L93 Difference]: Finished difference Result 33597 states and 122505 transitions. [2022-11-20 09:30:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:30:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:17,285 INFO L225 Difference]: With dead ends: 33597 [2022-11-20 09:30:17,285 INFO L226 Difference]: Without dead ends: 33597 [2022-11-20 09:30:17,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:30:17,286 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 274 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:17,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 20 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 09:30:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33597 states. [2022-11-20 09:30:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33597 to 16803. [2022-11-20 09:30:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 11616 states have (on average 5.273760330578512) internal successors, (61260), 16802 states have internal predecessors, (61260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 61260 transitions. [2022-11-20 09:30:18,224 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 61260 transitions. Word has length 8 [2022-11-20 09:30:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:18,225 INFO L495 AbstractCegarLoop]: Abstraction has 16803 states and 61260 transitions. [2022-11-20 09:30:18,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 61260 transitions. [2022-11-20 09:30:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:30:18,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:18,226 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1] [2022-11-20 09:30:18,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:18,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash 415459643, now seen corresponding path program 2 times [2022-11-20 09:30:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:18,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603732938] [2022-11-20 09:30:18,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:18,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:18,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:18,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 09:30:18,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:30:18,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:18,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:18,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:19,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:20,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:20,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603732938] [2022-11-20 09:30:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603732938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:20,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:20,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:30:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021440783] [2022-11-20 09:30:20,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:30:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:30:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:30:20,965 INFO L87 Difference]: Start difference. First operand 16803 states and 61260 transitions. Second operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:24,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:26,331 WARN L539 Checker$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 09:30:28,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:30,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:32,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:33,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:35,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:37,845 WARN L539 Checker$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 09:30:39,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:41,583 WARN L539 Checker$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 09:30:43,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:45,589 WARN L539 Checker$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 09:30:46,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:30:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:56,903 INFO L93 Difference]: Finished difference Result 16811 states and 61276 transitions. [2022-11-20 09:30:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:30:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:30:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:56,979 INFO L225 Difference]: With dead ends: 16811 [2022-11-20 09:30:56,980 INFO L226 Difference]: Without dead ends: 16811 [2022-11-20 09:30:56,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:30:56,981 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 141 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:56,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1134 Invalid, 9 Unknown, 0 Unchecked, 31.8s Time] [2022-11-20 09:30:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16811 states. [2022-11-20 09:30:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16811 to 16811. [2022-11-20 09:30:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16811 states, 11624 states have (on average 5.27150722642808) internal successors, (61276), 16810 states have internal predecessors, (61276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16811 states to 16811 states and 61276 transitions. [2022-11-20 09:30:57,543 INFO L78 Accepts]: Start accepts. Automaton has 16811 states and 61276 transitions. Word has length 8 [2022-11-20 09:30:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:57,544 INFO L495 AbstractCegarLoop]: Abstraction has 16811 states and 61276 transitions. [2022-11-20 09:30:57,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:57,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16811 states and 61276 transitions. [2022-11-20 09:30:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:30:57,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:57,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:57,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:57,751 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -151761881, now seen corresponding path program 1 times [2022-11-20 09:30:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412730664] [2022-11-20 09:30:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:57,752 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 09:30:57,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:57,753 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:57,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 09:30:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:30:57,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:57,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:30:57,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:57,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412730664] [2022-11-20 09:30:57,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412730664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:30:57,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:30:57,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:30:57,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088532144] [2022-11-20 09:30:57,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:30:57,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:30:57,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:30:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:30:57,976 INFO L87 Difference]: Start difference. First operand 16811 states and 61276 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:58,912 INFO L93 Difference]: Finished difference Result 16811 states and 61275 transitions. [2022-11-20 09:30:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:30:58,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:30:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:59,206 INFO L225 Difference]: With dead ends: 16811 [2022-11-20 09:30:59,215 INFO L226 Difference]: Without dead ends: 16811 [2022-11-20 09:30:59,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 09:30:59,216 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:59,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 10 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:30:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16811 states. [2022-11-20 09:30:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16811 to 16811. [2022-11-20 09:30:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16811 states, 11624 states have (on average 5.2714211975223675) internal successors, (61275), 16810 states have internal predecessors, (61275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16811 states to 16811 states and 61275 transitions. [2022-11-20 09:30:59,700 INFO L78 Accepts]: Start accepts. Automaton has 16811 states and 61275 transitions. Word has length 9 [2022-11-20 09:30:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:59,700 INFO L495 AbstractCegarLoop]: Abstraction has 16811 states and 61275 transitions. [2022-11-20 09:30:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 16811 states and 61275 transitions. [2022-11-20 09:30:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:30:59,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:59,701 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-20 09:30:59,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:30:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1621481796, now seen corresponding path program 2 times [2022-11-20 09:30:59,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299616487] [2022-11-20 09:30:59,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:59,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:59,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:59,904 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:30:59,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 09:31:00,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:00,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:00,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 09:31:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:01,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299616487] [2022-11-20 09:31:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299616487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:01,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:01,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 09:31:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010865062] [2022-11-20 09:31:01,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:01,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:31:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:01,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:31:01,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:31:01,996 INFO L87 Difference]: Start difference. First operand 16811 states and 61275 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:06,315 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 09:31:07,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:09,795 WARN L539 Checker$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 09:31:11,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:13,801 WARN L539 Checker$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 09:31:15,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:20,637 WARN L539 Checker$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 09:31:21,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:23,879 WARN L539 Checker$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 09:31:25,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:27,883 WARN L539 Checker$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 09:31:29,886 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 09:31:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:34,950 INFO L93 Difference]: Finished difference Result 16828 states and 61307 transitions. [2022-11-20 09:31:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:31:34,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 16 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 10 [2022-11-20 09:31:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:35,027 INFO L225 Difference]: With dead ends: 16828 [2022-11-20 09:31:35,027 INFO L226 Difference]: Without dead ends: 16828 [2022-11-20 09:31:35,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:31:35,028 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 301 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:35,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 979 Invalid, 10 Unknown, 0 Unchecked, 29.4s Time] [2022-11-20 09:31:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2022-11-20 09:31:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 16822. [2022-11-20 09:31:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 11635 states have (on average 5.268328319724968) internal successors, (61297), 16821 states have internal predecessors, (61297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 61297 transitions. [2022-11-20 09:31:35,634 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 61297 transitions. Word has length 10 [2022-11-20 09:31:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:35,634 INFO L495 AbstractCegarLoop]: Abstraction has 16822 states and 61297 transitions. [2022-11-20 09:31:35,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 61297 transitions. [2022-11-20 09:31:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:31:35,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:35,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:35,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:35,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:35,837 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:31:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -106605947, now seen corresponding path program 1 times [2022-11-20 09:31:35,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:35,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196150181] [2022-11-20 09:31:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:35,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:35,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 09:31:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:31:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:31:36,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:31:36,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196150181] [2022-11-20 09:31:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196150181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:36,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:36,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-20 09:31:36,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873158851] [2022-11-20 09:31:36,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:31:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:36,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:31:36,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:31:36,534 INFO L87 Difference]: Start difference. First operand 16822 states and 61297 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:38,785 INFO L93 Difference]: Finished difference Result 33611 states and 122531 transitions. [2022-11-20 09:31:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:38,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 09:31:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:38,937 INFO L225 Difference]: With dead ends: 33611 [2022-11-20 09:31:38,937 INFO L226 Difference]: Without dead ends: 33611 [2022-11-20 09:31:38,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:31:38,938 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 459 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:38,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 25 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 09:31:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33611 states. [2022-11-20 09:31:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33611 to 16822. [2022-11-20 09:31:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16822 states, 11635 states have (on average 5.2682423721529865) internal successors, (61296), 16821 states have internal predecessors, (61296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16822 states to 16822 states and 61296 transitions. [2022-11-20 09:31:39,647 INFO L78 Accepts]: Start accepts. Automaton has 16822 states and 61296 transitions. Word has length 10 [2022-11-20 09:31:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:39,647 INFO L495 AbstractCegarLoop]: Abstraction has 16822 states and 61296 transitions. [2022-11-20 09:31:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 16822 states and 61296 transitions. [2022-11-20 09:31:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:39,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:39,649 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:39,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:39,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:39,853 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:31:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash 984982455, now seen corresponding path program 1 times [2022-11-20 09:31:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:39,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281931468] [2022-11-20 09:31:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:39,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:39,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:39,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:31:39,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 09:31:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:31:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:31:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:31:40,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:31:41,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:41,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281931468] [2022-11-20 09:31:41,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281931468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:41,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:41,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:31:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632558475] [2022-11-20 09:31:41,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:41,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:31:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:31:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:31:41,225 INFO L87 Difference]: Start difference. First operand 16822 states and 61296 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) 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 09:31:44,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:46,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:47,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:49,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:51,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:53,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:55,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:57,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:31:59,340 WARN L539 Checker$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 09:32:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:07,446 INFO L93 Difference]: Finished difference Result 50361 states and 183693 transitions. [2022-11-20 09:32:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:32:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) 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 09:32:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:07,650 INFO L225 Difference]: With dead ends: 50361 [2022-11-20 09:32:07,650 INFO L226 Difference]: Without dead ends: 50361 [2022-11-20 09:32:07,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:32:07,651 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 924 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 86 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:07,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 30 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 883 Invalid, 4 Unknown, 0 Unchecked, 23.4s Time] [2022-11-20 09:32:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50361 states. [2022-11-20 09:32:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50361 to 16829. [2022-11-20 09:32:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16829 states, 11642 states have (on average 5.266277271946401) internal successors, (61310), 16828 states have internal predecessors, (61310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16829 states to 16829 states and 61310 transitions. [2022-11-20 09:32:08,450 INFO L78 Accepts]: Start accepts. Automaton has 16829 states and 61310 transitions. Word has length 11 [2022-11-20 09:32:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:08,451 INFO L495 AbstractCegarLoop]: Abstraction has 16829 states and 61310 transitions. [2022-11-20 09:32:08,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) 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 09:32:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 16829 states and 61310 transitions. [2022-11-20 09:32:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:32:08,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:08,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:08,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:08,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:08,659 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash 990053639, now seen corresponding path program 1 times [2022-11-20 09:32:08,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:08,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566193948] [2022-11-20 09:32:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:08,662 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:08,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 09:32:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:32:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:32:08,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:08,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:08,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566193948] [2022-11-20 09:32:08,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566193948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:08,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:08,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:32:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39133927] [2022-11-20 09:32:08,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:08,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:32:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:32:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:32:08,890 INFO L87 Difference]: Start difference. First operand 16829 states and 61310 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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 09:32:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:09,929 INFO L93 Difference]: Finished difference Result 16829 states and 61309 transitions. [2022-11-20 09:32:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:32:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 09:32:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:09,982 INFO L225 Difference]: With dead ends: 16829 [2022-11-20 09:32:09,982 INFO L226 Difference]: Without dead ends: 16829 [2022-11-20 09:32:09,982 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 09:32:09,983 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:09,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:32:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16829 states. [2022-11-20 09:32:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16829 to 16829. [2022-11-20 09:32:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16829 states, 11642 states have (on average 5.266191376052225) internal successors, (61309), 16828 states have internal predecessors, (61309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16829 states to 16829 states and 61309 transitions. [2022-11-20 09:32:10,591 INFO L78 Accepts]: Start accepts. Automaton has 16829 states and 61309 transitions. Word has length 11 [2022-11-20 09:32:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:10,591 INFO L495 AbstractCegarLoop]: Abstraction has 16829 states and 61309 transitions. [2022-11-20 09:32:10,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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 09:32:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16829 states and 61309 transitions. [2022-11-20 09:32:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:32:10,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:10,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:10,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:10,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:10,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1080805878, now seen corresponding path program 1 times [2022-11-20 09:32:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:10,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434024559] [2022-11-20 09:32:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:10,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:10,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:10,801 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:10,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 09:32:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:32:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:11,184 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 09:32:11,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:11,378 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 09:32:11,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:11,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434024559] [2022-11-20 09:32:11,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434024559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:11,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:11,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:32:11,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166957949] [2022-11-20 09:32:11,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:11,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:32:11,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:32:11,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:32:11,380 INFO L87 Difference]: Start difference. First operand 16829 states and 61309 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 09:32:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:13,717 INFO L93 Difference]: Finished difference Result 33614 states and 122531 transitions. [2022-11-20 09:32:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:13,717 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 09:32:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:13,856 INFO L225 Difference]: With dead ends: 33614 [2022-11-20 09:32:13,856 INFO L226 Difference]: Without dead ends: 33614 [2022-11-20 09:32:13,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:32:13,857 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 361 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:13,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 36 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 09:32:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33614 states. [2022-11-20 09:32:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33614 to 16829. [2022-11-20 09:32:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16829 states, 11642 states have (on average 5.265933688369696) internal successors, (61306), 16828 states have internal predecessors, (61306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16829 states to 16829 states and 61306 transitions. [2022-11-20 09:32:14,523 INFO L78 Accepts]: Start accepts. Automaton has 16829 states and 61306 transitions. Word has length 12 [2022-11-20 09:32:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:14,523 INFO L495 AbstractCegarLoop]: Abstraction has 16829 states and 61306 transitions. [2022-11-20 09:32:14,523 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 09:32:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 16829 states and 61306 transitions. [2022-11-20 09:32:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:14,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:14,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:14,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:14,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:14,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:14,728 INFO L85 PathProgramCache]: Analyzing trace with hash 854756825, now seen corresponding path program 1 times [2022-11-20 09:32:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814459923] [2022-11-20 09:32:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:14,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:14,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:14,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 09:32:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:32:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:14,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:32:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:32:15,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:32:15,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:15,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814459923] [2022-11-20 09:32:15,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814459923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:15,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:15,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2022-11-20 09:32:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481255723] [2022-11-20 09:32:15,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:32:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:32:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:32:15,283 INFO L87 Difference]: Start difference. First operand 16829 states and 61306 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:16,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:18,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:20,263 INFO L93 Difference]: Finished difference Result 33597 states and 122507 transitions. [2022-11-20 09:32:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:32:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 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 13 [2022-11-20 09:32:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:20,386 INFO L225 Difference]: With dead ends: 33597 [2022-11-20 09:32:20,386 INFO L226 Difference]: Without dead ends: 33597 [2022-11-20 09:32:20,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:20,387 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 464 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:20,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 9 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-20 09:32:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33597 states. [2022-11-20 09:32:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33597 to 16832. [2022-11-20 09:32:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16832 states, 11645 states have (on average 5.26560755689137) internal successors, (61318), 16831 states have internal predecessors, (61318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16832 states to 16832 states and 61318 transitions. [2022-11-20 09:32:21,034 INFO L78 Accepts]: Start accepts. Automaton has 16832 states and 61318 transitions. Word has length 13 [2022-11-20 09:32:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:21,034 INFO L495 AbstractCegarLoop]: Abstraction has 16832 states and 61318 transitions. [2022-11-20 09:32:21,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 16832 states and 61318 transitions. [2022-11-20 09:32:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:21,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:21,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:21,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:21,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:21,238 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 854757267, now seen corresponding path program 1 times [2022-11-20 09:32:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:21,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692287538] [2022-11-20 09:32:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:21,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:21,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:21,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 09:32:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:32:21,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:21,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:21,657 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 09:32:21,657 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 09:32:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:22,029 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 09:32:22,030 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 09:32:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:22,426 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 09:32:22,427 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 45 treesize of output 60 [2022-11-20 09:32:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:22,813 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 09:32:22,813 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 45 treesize of output 60 [2022-11-20 09:32:23,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:23,439 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 09:32:23,439 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 45 treesize of output 60 [2022-11-20 09:32:24,089 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 09:32:24,089 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 59 treesize of output 84 [2022-11-20 09:32:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:32:24,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:24,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692287538] [2022-11-20 09:32:24,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692287538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:24,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:24,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:32:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41077102] [2022-11-20 09:32:24,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:24,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:32:24,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:24,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:32:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:32:24,639 INFO L87 Difference]: Start difference. First operand 16832 states and 61318 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:25,165 INFO L93 Difference]: Finished difference Result 16831 states and 61314 transitions. [2022-11-20 09:32:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:32:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:32:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:25,216 INFO L225 Difference]: With dead ends: 16831 [2022-11-20 09:32:25,216 INFO L226 Difference]: Without dead ends: 16831 [2022-11-20 09:32:25,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:32:25,217 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:25,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-11-20 09:32:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16831 states. [2022-11-20 09:32:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16831 to 16831. [2022-11-20 09:32:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16831 states, 11645 states have (on average 5.265264061829111) internal successors, (61314), 16830 states have internal predecessors, (61314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16831 states to 16831 states and 61314 transitions. [2022-11-20 09:32:25,699 INFO L78 Accepts]: Start accepts. Automaton has 16831 states and 61314 transitions. Word has length 13 [2022-11-20 09:32:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:25,699 INFO L495 AbstractCegarLoop]: Abstraction has 16831 states and 61314 transitions. [2022-11-20 09:32:25,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 16831 states and 61314 transitions. [2022-11-20 09:32:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:25,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:25,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:25,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:25,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 854757268, now seen corresponding path program 1 times [2022-11-20 09:32:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:25,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428437798] [2022-11-20 09:32:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:25,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:25,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:25,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 09:32:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:32:26,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,399 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 09:32:26,400 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 09:32:26,430 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 09:32:26,431 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 44 treesize of output 45 [2022-11-20 09:32:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:26,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:32:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:26,716 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:32:26,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:32:26,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:26,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:32:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:32:27,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:32:27,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428437798] [2022-11-20 09:32:27,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428437798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:27,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:27,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:32:27,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049628240] [2022-11-20 09:32:27,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:27,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:32:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:32:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:27,045 INFO L87 Difference]: Start difference. First operand 16831 states and 61314 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:27,700 INFO L93 Difference]: Finished difference Result 16830 states and 61310 transitions. [2022-11-20 09:32:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:32:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:32:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:27,942 INFO L225 Difference]: With dead ends: 16830 [2022-11-20 09:32:27,943 INFO L226 Difference]: Without dead ends: 16830 [2022-11-20 09:32:27,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:32:27,944 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:27,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 164 Unchecked, 0.6s Time] [2022-11-20 09:32:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16830 states. [2022-11-20 09:32:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16830 to 16830. [2022-11-20 09:32:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16830 states, 11645 states have (on average 5.264920566766853) internal successors, (61310), 16829 states have internal predecessors, (61310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16830 states to 16830 states and 61310 transitions. [2022-11-20 09:32:28,299 INFO L78 Accepts]: Start accepts. Automaton has 16830 states and 61310 transitions. Word has length 13 [2022-11-20 09:32:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:28,299 INFO L495 AbstractCegarLoop]: Abstraction has 16830 states and 61310 transitions. [2022-11-20 09:32:28,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16830 states and 61310 transitions. [2022-11-20 09:32:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:28,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:28,300 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:28,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:28,513 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 854622195, now seen corresponding path program 1 times [2022-11-20 09:32:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:28,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131766731] [2022-11-20 09:32:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:28,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:28,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 09:32:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:32:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:28,749 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 6 treesize of output 5 [2022-11-20 09:32:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:32:28,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:32:29,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131766731] [2022-11-20 09:32:29,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131766731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:29,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:29,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-20 09:32:29,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116480547] [2022-11-20 09:32:29,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:29,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 09:32:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 09:32:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:29,799 INFO L87 Difference]: Start difference. First operand 16830 states and 61310 transitions. Second operand has 11 states, 10 states have (on average 2.4) 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 09:32:32,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:34,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:36,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:38,424 WARN L539 Checker$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 09:32:40,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:32:42,790 WARN L539 Checker$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 09:32:44,793 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 09:32:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:48,465 INFO L93 Difference]: Finished difference Result 16835 states and 61320 transitions. [2022-11-20 09:32:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:32:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) 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 09:32:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:48,536 INFO L225 Difference]: With dead ends: 16835 [2022-11-20 09:32:48,536 INFO L226 Difference]: Without dead ends: 16835 [2022-11-20 09:32:48,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:32:48,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 170 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 53 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:48,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 18 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 560 Invalid, 4 Unknown, 0 Unchecked, 17.2s Time] [2022-11-20 09:32:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16835 states. [2022-11-20 09:32:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16835 to 16835. [2022-11-20 09:32:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16835 states, 11650 states have (on average 5.263519313304721) internal successors, (61320), 16834 states have internal predecessors, (61320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16835 states to 16835 states and 61320 transitions. [2022-11-20 09:32:49,089 INFO L78 Accepts]: Start accepts. Automaton has 16835 states and 61320 transitions. Word has length 13 [2022-11-20 09:32:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:49,090 INFO L495 AbstractCegarLoop]: Abstraction has 16835 states and 61320 transitions. [2022-11-20 09:32:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) 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 09:32:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 16835 states and 61320 transitions. [2022-11-20 09:32:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:32:49,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:49,091 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:49,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:49,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:49,291 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:32:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1507001961, now seen corresponding path program 1 times [2022-11-20 09:32:49,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866670843] [2022-11-20 09:32:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:49,293 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:32:49,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 09:32:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:49,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 09:32:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:50,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:53,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:53,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866670843] [2022-11-20 09:32:53,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866670843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:53,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:53,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-20 09:32:53,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348162288] [2022-11-20 09:32:53,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:32:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:32:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:32:53,229 INFO L87 Difference]: Start difference. First operand 16835 states and 61320 transitions. Second operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:02,202 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 09:33:04,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:06,208 WARN L539 Checker$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 09:33:08,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:09,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:11,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:13,378 WARN L539 Checker$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 09:33:15,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:17,430 WARN L539 Checker$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 09:33:19,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:21,724 WARN L539 Checker$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 09:33:23,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:25,729 WARN L539 Checker$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 09:33:27,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:29,502 WARN L539 Checker$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 09:33:31,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:33:33,508 WARN L539 Checker$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 09:33:35,575 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 09:33:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:53,619 INFO L93 Difference]: Finished difference Result 16858 states and 61364 transitions. [2022-11-20 09:33:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:33:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 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 09:33:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:53,684 INFO L225 Difference]: With dead ends: 16858 [2022-11-20 09:33:53,684 INFO L226 Difference]: Without dead ends: 16858 [2022-11-20 09:33:53,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:33:53,685 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 438 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:53,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1679 Invalid, 16 Unknown, 0 Unchecked, 44.9s Time] [2022-11-20 09:33:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16858 states. [2022-11-20 09:33:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16858 to 16846. [2022-11-20 09:33:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16846 states, 11661 states have (on average 5.2604407855243975) internal successors, (61342), 16845 states have internal predecessors, (61342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16846 states to 16846 states and 61342 transitions. [2022-11-20 09:33:54,151 INFO L78 Accepts]: Start accepts. Automaton has 16846 states and 61342 transitions. Word has length 15 [2022-11-20 09:33:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:54,151 INFO L495 AbstractCegarLoop]: Abstraction has 16846 states and 61342 transitions. [2022-11-20 09:33:54,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 16846 states and 61342 transitions. [2022-11-20 09:33:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:33:54,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:54,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:54,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:54,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:54,353 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:33:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:54,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029173, now seen corresponding path program 1 times [2022-11-20 09:33:54,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:54,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638430987] [2022-11-20 09:33:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:54,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:54,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:54,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 09:33:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:33:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:54,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:54,814 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:33:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:33:54,897 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:33:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 09:33:54,967 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-20 09:33:54,967 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 21 treesize of output 32 [2022-11-20 09:33:55,030 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-20 09:33:55,031 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 21 treesize of output 32 [2022-11-20 09:33:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:33:55,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:33:55,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:55,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638430987] [2022-11-20 09:33:55,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638430987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:55,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:55,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:33:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597870076] [2022-11-20 09:33:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:33:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:33:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:33:55,085 INFO L87 Difference]: Start difference. First operand 16846 states and 61342 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:55,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:55,803 INFO L93 Difference]: Finished difference Result 13590 states and 49542 transitions. [2022-11-20 09:33:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:33:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:33:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:56,095 INFO L225 Difference]: With dead ends: 13590 [2022-11-20 09:33:56,096 INFO L226 Difference]: Without dead ends: 13590 [2022-11-20 09:33:56,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:33:56,098 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 225 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:56,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 2 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 7 Unchecked, 0.6s Time] [2022-11-20 09:33:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13590 states. [2022-11-20 09:33:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13590 to 13590. [2022-11-20 09:33:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13590 states, 9837 states have (on average 5.036291552302531) internal successors, (49542), 13589 states have internal predecessors, (49542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13590 states to 13590 states and 49542 transitions. [2022-11-20 09:33:56,383 INFO L78 Accepts]: Start accepts. Automaton has 13590 states and 49542 transitions. Word has length 15 [2022-11-20 09:33:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:56,384 INFO L495 AbstractCegarLoop]: Abstraction has 13590 states and 49542 transitions. [2022-11-20 09:33:56,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 13590 states and 49542 transitions. [2022-11-20 09:33:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:33:56,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:56,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:56,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:56,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:56,587 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:33:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029174, now seen corresponding path program 1 times [2022-11-20 09:33:56,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:56,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445153531] [2022-11-20 09:33:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:56,588 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 09:33:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:56,589 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:33:56,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 09:33:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:33:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:57,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:33:57,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 09:33:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:33:57,261 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:33:57,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:33:57,474 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:33:57,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 09:33:57,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:33:57,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,581 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 16 treesize of output 18 [2022-11-20 09:33:57,649 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:33:57,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 09:33:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:57,744 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 16 treesize of output 18 [2022-11-20 09:33:57,968 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 09:33:57,968 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 09:33:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:33:58,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:34:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:34:10,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:34:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:34:10,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:10,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445153531] [2022-11-20 09:34:10,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445153531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:10,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:10,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 09:34:10,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180909549] [2022-11-20 09:34:10,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:34:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:34:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2022-11-20 09:34:10,981 INFO L87 Difference]: Start difference. First operand 13590 states and 49542 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) 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 09:34:15,447 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul (_ bv4 32) c_~id_3~0))) (let ((.cse0 (bvadd (_ bv4 32) .cse1 c_~get_5~0.offset))) (and (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184|) (_ bv0 1))) (forall ((v_ArrVal_882 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_182| (_ BitVec 32)) (v_ArrVal_883 (_ BitVec 32))) (or (forall ((v_ArrVal_886 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184| v_ArrVal_883) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_182| v_ArrVal_886) c_~get_5~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184| v_ArrVal_882) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_182|))))))) (or (forall ((v_ArrVal_882 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_182| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184| (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184| v_ArrVal_882) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_182|))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_184|) (_ bv0 1))))) (bvule (bvadd .cse1 c_~get_5~0.offset) .cse0)) (bvsge c_~id_3~0 (_ bv0 32))))) is different from false [2022-11-20 09:34:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:17,896 INFO L93 Difference]: Finished difference Result 22984 states and 83126 transitions. [2022-11-20 09:34:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:34:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) 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 15 [2022-11-20 09:34:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:18,126 INFO L225 Difference]: With dead ends: 22984 [2022-11-20 09:34:18,127 INFO L226 Difference]: Without dead ends: 22984 [2022-11-20 09:34:18,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=4, NotChecked=22, Total=182 [2022-11-20 09:34:18,127 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 722 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:18,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 9 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 324 Invalid, 0 Unknown, 722 Unchecked, 2.5s Time] [2022-11-20 09:34:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22984 states. [2022-11-20 09:34:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22984 to 12327. [2022-11-20 09:34:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12327 states, 9203 states have (on average 4.800065196131696) internal successors, (44175), 12326 states have internal predecessors, (44175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12327 states to 12327 states and 44175 transitions. [2022-11-20 09:34:18,451 INFO L78 Accepts]: Start accepts. Automaton has 12327 states and 44175 transitions. Word has length 15 [2022-11-20 09:34:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:18,452 INFO L495 AbstractCegarLoop]: Abstraction has 12327 states and 44175 transitions. [2022-11-20 09:34:18,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) 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 09:34:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12327 states and 44175 transitions. [2022-11-20 09:34:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:18,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:18,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:18,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:18,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:18,654 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:34:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029214, now seen corresponding path program 1 times [2022-11-20 09:34:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:18,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432933770] [2022-11-20 09:34:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:18,656 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 09:34:18,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:18,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 09:34:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:34:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,190 INFO L321 Elim1Store]: treesize reduction 87, result has 20.2 percent of original size [2022-11-20 09:34:19,190 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 40 [2022-11-20 09:34:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,335 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:34:19,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-20 09:34:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,545 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:34:19,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 55 [2022-11-20 09:34:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:19,876 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-20 09:34:19,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 71 [2022-11-20 09:34:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:22,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:22,511 INFO L321 Elim1Store]: treesize reduction 36, result has 48.6 percent of original size [2022-11-20 09:34:22,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 68 [2022-11-20 09:34:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:31,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:31,126 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 09:34:31,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 09:34:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:34:41,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:34:41,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:41,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432933770] [2022-11-20 09:34:41,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432933770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:34:41,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:34:41,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 09:34:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146077807] [2022-11-20 09:34:41,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:34:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:34:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:34:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=33, Unknown=4, NotChecked=0, Total=56 [2022-11-20 09:34:41,552 INFO L87 Difference]: Start difference. First operand 12327 states and 44175 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:42,136 INFO L93 Difference]: Finished difference Result 12324 states and 44164 transitions. [2022-11-20 09:34:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:34:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:42,175 INFO L225 Difference]: With dead ends: 12324 [2022-11-20 09:34:42,175 INFO L226 Difference]: Without dead ends: 12324 [2022-11-20 09:34:42,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=19, Invalid=33, Unknown=4, NotChecked=0, Total=56 [2022-11-20 09:34:42,176 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:42,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 253 Unchecked, 0.4s Time] [2022-11-20 09:34:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12324 states. [2022-11-20 09:34:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12324 to 12324. [2022-11-20 09:34:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12324 states, 9201 states have (on average 4.799913052929029) internal successors, (44164), 12323 states have internal predecessors, (44164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12324 states to 12324 states and 44164 transitions. [2022-11-20 09:34:42,450 INFO L78 Accepts]: Start accepts. Automaton has 12324 states and 44164 transitions. Word has length 15 [2022-11-20 09:34:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:42,450 INFO L495 AbstractCegarLoop]: Abstraction has 12324 states and 44164 transitions. [2022-11-20 09:34:42,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 12324 states and 44164 transitions. [2022-11-20 09:34:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:42,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:42,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:42,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:42,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:42,651 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:34:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:42,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028527, now seen corresponding path program 1 times [2022-11-20 09:34:42,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:42,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700401037] [2022-11-20 09:34:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:42,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:42,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 09:34:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:43,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:34:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:43,165 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:34:43,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:34:43,197 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:34:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:34:43,272 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:34:43,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 09:34:43,381 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 09:34:43,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 09:34:43,547 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-20 09:34:43,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-20 09:34:43,666 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-20 09:34:43,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-20 09:34:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:34:43,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:34:43,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:43,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700401037] [2022-11-20 09:34:43,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700401037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:34:43,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:34:43,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:34:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211697778] [2022-11-20 09:34:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:34:43,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:34:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:34:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:34:43,928 INFO L87 Difference]: Start difference. First operand 12324 states and 44164 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:44,577 INFO L93 Difference]: Finished difference Result 12321 states and 44156 transitions. [2022-11-20 09:34:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:34:44,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:44,619 INFO L225 Difference]: With dead ends: 12321 [2022-11-20 09:34:44,619 INFO L226 Difference]: Without dead ends: 12321 [2022-11-20 09:34:44,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:34:44,620 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:44,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 84 Unchecked, 0.6s Time] [2022-11-20 09:34:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-11-20 09:34:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 12321. [2022-11-20 09:34:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12321 states, 9199 states have (on average 4.800086965974563) internal successors, (44156), 12320 states have internal predecessors, (44156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12321 states to 12321 states and 44156 transitions. [2022-11-20 09:34:44,864 INFO L78 Accepts]: Start accepts. Automaton has 12321 states and 44156 transitions. Word has length 15 [2022-11-20 09:34:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:44,864 INFO L495 AbstractCegarLoop]: Abstraction has 12321 states and 44156 transitions. [2022-11-20 09:34:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,865 INFO L276 IsEmpty]: Start isEmpty. Operand 12321 states and 44156 transitions. [2022-11-20 09:34:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:44,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:44,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:44,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:45,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:45,066 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:34:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029215, now seen corresponding path program 1 times [2022-11-20 09:34:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:45,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476744057] [2022-11-20 09:34:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:45,067 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:45,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 09:34:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:34:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,573 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 09:34:45,573 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 09:34:45,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:34:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:45,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:34:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:45,773 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:34:45,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:34:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:45,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:46,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:34:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:34:46,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:34:46,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:46,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476744057] [2022-11-20 09:34:46,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476744057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:34:46,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:34:46,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:34:46,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540365406] [2022-11-20 09:34:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:34:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:34:46,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:46,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:34:46,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:34:46,201 INFO L87 Difference]: Start difference. First operand 12321 states and 44156 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:46,963 INFO L93 Difference]: Finished difference Result 12318 states and 44147 transitions. [2022-11-20 09:34:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:34:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 09:34:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:47,001 INFO L225 Difference]: With dead ends: 12318 [2022-11-20 09:34:47,001 INFO L226 Difference]: Without dead ends: 12318 [2022-11-20 09:34:47,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:34:47,002 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:47,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 89 Unchecked, 0.6s Time] [2022-11-20 09:34:47,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2022-11-20 09:34:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 12318. [2022-11-20 09:34:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 9197 states have (on average 4.800152223551158) internal successors, (44147), 12317 states have internal predecessors, (44147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 44147 transitions. [2022-11-20 09:34:47,242 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 44147 transitions. Word has length 15 [2022-11-20 09:34:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:47,242 INFO L495 AbstractCegarLoop]: Abstraction has 12318 states and 44147 transitions. [2022-11-20 09:34:47,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 44147 transitions. [2022-11-20 09:34:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:34:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:47,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:47,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:47,447 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:34:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028528, now seen corresponding path program 1 times [2022-11-20 09:34:47,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:47,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228529623] [2022-11-20 09:34:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:47,449 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:34:47,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 09:34:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:47,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:34:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:48,022 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:48,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:48,189 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:34:48,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:34:48,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:48,353 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 09:34:48,380 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:34:48,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:34:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:48,526 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 16 treesize of output 18 [2022-11-20 09:34:48,573 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-20 09:34:48,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-20 09:34:48,896 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-20 09:34:48,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-20 09:34:48,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:34:49,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:49,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:34:49,143 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-20 09:34:49,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-20 09:34:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:49,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 09:34:49,324 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-20 09:34:49,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-20 09:34:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:34:49,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:00,320 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse0 (bvadd (_ bv4 32) c_~get_2~0.offset .cse3))) (and (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189| (_ BitVec 32))) (or (forall ((v_ArrVal_1137 (_ BitVec 32)) (v_ArrVal_1138 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189| v_ArrVal_1138))) (or (forall ((v_ArrVal_1140 (_ BitVec 1)) (v_ArrVal_1139 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_187| (_ BitVec 32))) (or (forall ((v_ArrVal_1141 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189| v_ArrVal_1137) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188| v_ArrVal_1139) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_187| v_ArrVal_1141) c_~get_2~0.base))) (not (= (_ bv0 1) (select (store .cse1 |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188| v_ArrVal_1140) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_187|))))) (not (= (_ bv0 1) (select .cse1 |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188|)))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189|))))) (or (forall ((v_ArrVal_1140 (_ BitVec 1)) (v_ArrVal_1138 (_ BitVec 1)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_187| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189| (_ BitVec 32))) (let ((.cse2 (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189| v_ArrVal_1138))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_189|))) (not (= (_ bv0 1) (select (store .cse2 |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188| v_ArrVal_1140) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_187|))) (not (= (_ bv0 1) (select .cse2 |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_188|)))))) (bvule (bvadd c_~get_2~0.offset .cse3) .cse0))))) is different from false [2022-11-20 09:35:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:35:12,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:12,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228529623] [2022-11-20 09:35:12,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228529623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:12,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:12,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2022-11-20 09:35:12,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125292984] [2022-11-20 09:35:12,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:35:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:35:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=111, Unknown=5, NotChecked=22, Total=182 [2022-11-20 09:35:12,499 INFO L87 Difference]: Start difference. First operand 12318 states and 44147 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 09:35:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:13,312 INFO L93 Difference]: Finished difference Result 12540 states and 44589 transitions. [2022-11-20 09:35:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:35:13,313 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 15 [2022-11-20 09:35:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:13,367 INFO L225 Difference]: With dead ends: 12540 [2022-11-20 09:35:13,367 INFO L226 Difference]: Without dead ends: 12540 [2022-11-20 09:35:13,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=54, Invalid=127, Unknown=5, NotChecked=24, Total=210 [2022-11-20 09:35:13,368 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:13,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 341 Unchecked, 0.5s Time] [2022-11-20 09:35:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12540 states. [2022-11-20 09:35:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12540 to 12429. [2022-11-20 09:35:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12429 states, 9308 states have (on average 4.766652342071336) internal successors, (44368), 12428 states have internal predecessors, (44368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12429 states to 12429 states and 44368 transitions. [2022-11-20 09:35:13,647 INFO L78 Accepts]: Start accepts. Automaton has 12429 states and 44368 transitions. Word has length 15 [2022-11-20 09:35:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:13,647 INFO L495 AbstractCegarLoop]: Abstraction has 12429 states and 44368 transitions. [2022-11-20 09:35:13,647 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 09:35:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 12429 states and 44368 transitions. [2022-11-20 09:35:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:35:13,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:13,648 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:13,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:13,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:13,849 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:35:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash -786248048, now seen corresponding path program 2 times [2022-11-20 09:35:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:13,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482505061] [2022-11-20 09:35:13,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:13,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:13,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:13,850 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:13,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 09:35:14,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:14,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:35:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:14,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 09:35:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:35:14,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:35:15,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:15,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482505061] [2022-11-20 09:35:15,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482505061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:15,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:15,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-11-20 09:35:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327383268] [2022-11-20 09:35:15,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:15,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:35:15,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:35:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:35:15,448 INFO L87 Difference]: Start difference. First operand 12429 states and 44368 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) 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 09:35:18,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:20,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:22,242 WARN L539 Checker$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 09:35:24,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:26,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:28,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:30,347 WARN L539 Checker$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 09:35:32,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 09:35:34,352 WARN L539 Checker$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 09:35:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:47,175 INFO L93 Difference]: Finished difference Result 109997 states and 395688 transitions. [2022-11-20 09:35:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:35:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) 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 09:35:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:47,811 INFO L225 Difference]: With dead ends: 109997 [2022-11-20 09:35:47,812 INFO L226 Difference]: Without dead ends: 109997 [2022-11-20 09:35:47,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:35:47,812 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2393 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 33 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:47,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2393 Valid, 48 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1670 Invalid, 6 Unknown, 0 Unchecked, 28.8s Time] [2022-11-20 09:35:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109997 states. [2022-11-20 09:35:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109997 to 12453. [2022-11-20 09:35:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12453 states, 9332 states have (on average 4.7595370767252465) internal successors, (44416), 12452 states have internal predecessors, (44416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12453 states to 12453 states and 44416 transitions. [2022-11-20 09:35:49,141 INFO L78 Accepts]: Start accepts. Automaton has 12453 states and 44416 transitions. Word has length 16 [2022-11-20 09:35:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:49,141 INFO L495 AbstractCegarLoop]: Abstraction has 12453 states and 44416 transitions. [2022-11-20 09:35:49,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) 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 09:35:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12453 states and 44416 transitions. [2022-11-20 09:35:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:35:49,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:49,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:49,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:49,343 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:35:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:49,343 INFO L85 PathProgramCache]: Analyzing trace with hash -785844827, now seen corresponding path program 1 times [2022-11-20 09:35:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:49,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086743030] [2022-11-20 09:35:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:49,345 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:49,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 09:35:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:35:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:49,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:35:49,798 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:35:49,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 09:35:49,822 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 09:35:49,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 09:35:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:35:49,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:35:49,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:49,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086743030] [2022-11-20 09:35:49,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086743030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:35:49,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:35:49,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:35:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478552491] [2022-11-20 09:35:49,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:49,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:35:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:35:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:35:49,842 INFO L87 Difference]: Start difference. First operand 12453 states and 44416 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:50,567 INFO L93 Difference]: Finished difference Result 10701 states and 37910 transitions. [2022-11-20 09:35:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:35:50,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 16 [2022-11-20 09:35:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:50,602 INFO L225 Difference]: With dead ends: 10701 [2022-11-20 09:35:50,602 INFO L226 Difference]: Without dead ends: 10701 [2022-11-20 09:35:50,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 09:35:50,603 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 132 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:50,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 3 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:35:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10701 states. [2022-11-20 09:35:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10701 to 10701. [2022-11-20 09:35:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10701 states, 8164 states have (on average 4.643557079862813) internal successors, (37910), 10700 states have internal predecessors, (37910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10701 states to 10701 states and 37910 transitions. [2022-11-20 09:35:50,876 INFO L78 Accepts]: Start accepts. Automaton has 10701 states and 37910 transitions. Word has length 16 [2022-11-20 09:35:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:50,876 INFO L495 AbstractCegarLoop]: Abstraction has 10701 states and 37910 transitions. [2022-11-20 09:35:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 10701 states and 37910 transitions. [2022-11-20 09:35:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:35:50,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:50,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:50,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:51,078 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:35:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -785844826, now seen corresponding path program 1 times [2022-11-20 09:35:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557222565] [2022-11-20 09:35:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:51,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:51,080 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:35:51,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 09:35:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:51,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 09:35:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:51,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 09:35:51,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 09:35:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:35:51,959 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 09:35:51,983 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 09:35:51,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 09:35:52,136 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:35:52,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 09:35:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:52,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 09:35:54,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 09:35:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:35:55,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:55,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557222565] [2022-11-20 09:35:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557222565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:55,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:55,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:35:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751739491] [2022-11-20 09:35:55,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:35:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:35:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:35:55,014 INFO L87 Difference]: Start difference. First operand 10701 states and 37910 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:01,062 INFO L93 Difference]: Finished difference Result 22042 states and 79388 transitions. [2022-11-20 09:36:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:36:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 09:36:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:01,169 INFO L225 Difference]: With dead ends: 22042 [2022-11-20 09:36:01,169 INFO L226 Difference]: Without dead ends: 22042 [2022-11-20 09:36:01,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:36:01,170 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 417 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:01,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 26 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 821 Invalid, 0 Unknown, 382 Unchecked, 5.0s Time] [2022-11-20 09:36:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22042 states. [2022-11-20 09:36:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22042 to 12036. [2022-11-20 09:36:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12036 states, 9499 states have (on average 4.711022212864512) internal successors, (44750), 12035 states have internal predecessors, (44750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12036 states to 12036 states and 44750 transitions. [2022-11-20 09:36:01,629 INFO L78 Accepts]: Start accepts. Automaton has 12036 states and 44750 transitions. Word has length 16 [2022-11-20 09:36:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:01,629 INFO L495 AbstractCegarLoop]: Abstraction has 12036 states and 44750 transitions. [2022-11-20 09:36:01,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 12036 states and 44750 transitions. [2022-11-20 09:36:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:36:01,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:01,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:01,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:01,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:01,830 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:36:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash -785844889, now seen corresponding path program 1 times [2022-11-20 09:36:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615357105] [2022-11-20 09:36:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:01,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:01,832 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 09:36:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:36:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:02,347 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 09:36:02,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-20 09:36:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,418 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 09:36:02,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,549 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 09:36:02,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 43 [2022-11-20 09:36:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,733 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 09:36:02,734 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 25 treesize of output 40 [2022-11-20 09:36:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:02,897 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 09:36:03,066 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 09:36:03,066 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 09:36:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:36:03,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:36:03,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:03,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615357105] [2022-11-20 09:36:03,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615357105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:03,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:03,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 09:36:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031233101] [2022-11-20 09:36:03,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:03,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:36:03,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:36:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:36:03,428 INFO L87 Difference]: Start difference. First operand 12036 states and 44750 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:04,027 INFO L93 Difference]: Finished difference Result 12034 states and 44743 transitions. [2022-11-20 09:36:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 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 16 [2022-11-20 09:36:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:04,085 INFO L225 Difference]: With dead ends: 12034 [2022-11-20 09:36:04,085 INFO L226 Difference]: Without dead ends: 12034 [2022-11-20 09:36:04,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:36:04,086 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:04,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-11-20 09:36:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12034 states. [2022-11-20 09:36:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12034 to 12034. [2022-11-20 09:36:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 9497 states have (on average 4.71127724544593) internal successors, (44743), 12033 states have internal predecessors, (44743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 44743 transitions. [2022-11-20 09:36:04,476 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 44743 transitions. Word has length 16 [2022-11-20 09:36:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:04,476 INFO L495 AbstractCegarLoop]: Abstraction has 12034 states and 44743 transitions. [2022-11-20 09:36:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 44743 transitions. [2022-11-20 09:36:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:36:04,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:04,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:04,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:04,678 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-20 09:36:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -785844888, now seen corresponding path program 1 times [2022-11-20 09:36:04,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:04,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393147955] [2022-11-20 09:36:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:04,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:04,680 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:36:04,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05add1c5-bc95-42e1-8048-ba6fbb38a26a/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 09:36:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 09:36:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,331 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 09:36:05,332 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 17 treesize of output 34 [2022-11-20 09:36:05,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 09:36:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 09:36:05,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-20 09:36:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:36:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:06,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:36:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:36:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:36:06,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 09:36:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:36:06,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:36:37,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393147955] [2022-11-20 09:36:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393147955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:37,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:37,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 13 [2022-11-20 09:36:37,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657552442] [2022-11-20 09:36:37,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:37,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:36:37,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:36:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=142, Unknown=8, NotChecked=0, Total=210 [2022-11-20 09:36:37,117 INFO L87 Difference]: Start difference. First operand 12034 states and 44743 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:46,433 INFO L93 Difference]: Finished difference Result 22944 states and 85332 transitions. [2022-11-20 09:36:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:36:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 09:36:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted.