./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8 --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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- 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-2329fc7 [2022-12-13 20:50:55,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:50:55,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:50:55,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:50:55,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:50:55,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:50:55,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:50:55,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:50:55,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:50:55,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:50:55,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:50:55,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:50:55,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:50:55,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:50:55,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:50:55,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:50:55,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:50:55,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:50:55,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:50:55,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:50:55,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:50:55,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:50:55,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:50:55,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:50:55,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:50:55,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:50:55,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:50:55,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:50:55,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:50:55,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:50:55,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:50:55,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:50:55,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:50:55,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:50:55,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:50:55,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:50:55,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:50:55,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:50:55,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:50:55,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:50:55,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:50:55,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:50:55,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:50:55,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:50:55,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:50:55,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:50:55,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:50:55,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:50:55,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:50:55,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:50:55,220 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:50:55,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:50:55,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:50:55,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:50:55,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:50:55,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:50:55,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:50:55,222 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:50:55,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:50:55,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:50:55,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:50:55,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:50:55,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:50:55,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:50:55,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:50:55,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:50:55,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:50:55,224 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:50:55,224 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:50:55,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:50:55,224 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:50:55,224 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-12-13 20:50:55,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:50:55,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:50:55,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:50:55,438 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:50:55,439 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:50:55,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-12-13 20:50:57,980 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:50:58,127 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:50:58,128 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-12-13 20:50:58,133 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/f28cc18bb/079b1b8762ee4ada8c4ae38ee7ca58c6/FLAGf4bc004ae [2022-12-13 20:50:58,568 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/f28cc18bb/079b1b8762ee4ada8c4ae38ee7ca58c6 [2022-12-13 20:50:58,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:50:58,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:50:58,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:50:58,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:50:58,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:50:58,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:50:58" (1/1) ... [2022-12-13 20:50:58,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d755a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:50:58, skipping insertion in model container [2022-12-13 20:50:58,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:50:58" (1/1) ... [2022-12-13 20:50:58,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:50:58,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:50:58,731 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_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-12-13 20:50:58,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:50:58,750 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) [2022-12-13 20:50:58,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b5a03ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:50:58, skipping insertion in model container [2022-12-13 20:50:58,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:50:58,751 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 20:50:58,753 INFO L158 Benchmark]: Toolchain (without parser) took 177.68ms. Allocated memory is still 132.1MB. Free memory was 85.6MB in the beginning and 75.2MB in the end (delta: 10.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 20:50:58,754 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:50:58,755 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.90ms. Allocated memory is still 132.1MB. Free memory was 85.0MB in the beginning and 75.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 20:50:58,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 109.1MB. Free memory is still 79.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 174.90ms. Allocated memory is still 132.1MB. Free memory was 85.0MB in the beginning and 75.2MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 79]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8 --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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- 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-2329fc7 [2022-12-13 20:51:00,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:51:00,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:51:00,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:51:00,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:51:00,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:51:00,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:51:00,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:51:00,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:51:00,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:51:00,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:51:00,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:51:00,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:51:00,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:51:00,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:51:00,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:51:00,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:51:00,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:51:00,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:51:00,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:51:00,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:51:00,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:51:00,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:51:00,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:51:00,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:51:00,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:51:00,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:51:00,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:51:00,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:51:00,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:51:00,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:51:00,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:51:00,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:51:00,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:51:00,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:51:00,081 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:51:00,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:51:00,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:51:00,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:51:00,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:51:00,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:51:00,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 20:51:00,108 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:51:00,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:51:00,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:51:00,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:51:00,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:51:00,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:51:00,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:51:00,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:51:00,111 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:51:00,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:51:00,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:51:00,111 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:51:00,112 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:51:00,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:51:00,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:51:00,113 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 20:51:00,113 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 20:51:00,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:51:00,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:51:00,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:51:00,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:51:00,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:51:00,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:51:00,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:51:00,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:51:00,115 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 20:51:00,115 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 20:51:00,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:51:00,116 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:51:00,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:51:00,116 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 20:51:00,116 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:51:00,116 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-12-13 20:51:00,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:51:00,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:51:00,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:51:00,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:51:00,402 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:51:00,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-12-13 20:51:03,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:51:03,184 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:51:03,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-12-13 20:51:03,190 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/7e25dc5f9/5f77de7410ac4996aeafc746a3f8a5dd/FLAG473c3ea75 [2022-12-13 20:51:03,577 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/data/7e25dc5f9/5f77de7410ac4996aeafc746a3f8a5dd [2022-12-13 20:51:03,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:51:03,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:51:03,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:51:03,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:51:03,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:51:03,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2e38cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03, skipping insertion in model container [2022-12-13 20:51:03,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:51:03,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:51:03,750 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_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-12-13 20:51:03,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:51:03,773 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 20:51:03,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:51:03,795 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_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-12-13 20:51:03,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:51:03,802 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:51:03,818 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_f6d618c2-95f3-409c-8df7-faeb3173a770/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-12-13 20:51:03,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:51:03,837 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:51:03,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03 WrapperNode [2022-12-13 20:51:03,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:51:03,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:51:03,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:51:03,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:51:03,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,876 INFO L138 Inliner]: procedures = 27, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 179 [2022-12-13 20:51:03,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:51:03,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:51:03,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:51:03,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:51:03,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:51:03,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:51:03,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:51:03,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:51:03,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (1/1) ... [2022-12-13 20:51:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:51:03,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:51:03,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:51:03,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:51:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:51:03,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:51:03,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:51:03,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:51:03,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:51:03,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:51:03,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 20:51:03,980 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:51:04,087 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:51:04,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:51:04,794 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:51:04,801 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:51:04,801 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-13 20:51:04,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:51:04 BoogieIcfgContainer [2022-12-13 20:51:04,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:51:04,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:51:04,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:51:04,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:51:04,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:51:03" (1/3) ... [2022-12-13 20:51:04,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35688485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:51:04, skipping insertion in model container [2022-12-13 20:51:04,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:51:03" (2/3) ... [2022-12-13 20:51:04,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35688485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:51:04, skipping insertion in model container [2022-12-13 20:51:04,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:51:04" (3/3) ... [2022-12-13 20:51:04,808 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2022-12-13 20:51:04,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:51:04,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 20:51:04,823 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:51:04,901 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 20:51:04,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 308 transitions, 632 flow [2022-12-13 20:51:04,992 INFO L130 PetriNetUnfolder]: 26/306 cut-off events. [2022-12-13 20:51:04,992 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:51:04,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 306 events. 26/306 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 437 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2022-12-13 20:51:04,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 308 transitions, 632 flow [2022-12-13 20:51:05,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 282 places, 301 transitions, 614 flow [2022-12-13 20:51:05,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:51:05,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 282 places, 301 transitions, 614 flow [2022-12-13 20:51:05,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 282 places, 301 transitions, 614 flow [2022-12-13 20:51:05,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 282 places, 301 transitions, 614 flow [2022-12-13 20:51:05,056 INFO L130 PetriNetUnfolder]: 26/301 cut-off events. [2022-12-13 20:51:05,056 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:51:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 301 events. 26/301 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 437 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2022-12-13 20:51:05,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2022-12-13 20:52:06,356 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 131 DAG size of output: 130 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 20:52:21,850 WARN L233 SmtUtils]: Spent 12.19s on a formula simplification. DAG size of input: 149 DAG size of output: 146 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 20:52:23,767 INFO L134 LiptonReduction]: Checked pairs total: 3881 [2022-12-13 20:52:23,767 INFO L136 LiptonReduction]: Total number of compositions: 348 [2022-12-13 20:52:23,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:52:23,780 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=PETRI_NET, 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;@4a4586a9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:52:23,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-13 20:52:23,782 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 20:52:23,782 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:52:23,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:23,783 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:52:23,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash 36631, now seen corresponding path program 1 times [2022-12-13 20:52:23,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:23,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743016294] [2022-12-13 20:52:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:23,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:23,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:23,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:52:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:24,039 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:52:24,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:52:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:24,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:24,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743016294] [2022-12-13 20:52:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743016294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:24,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:52:24,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:52:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056642644] [2022-12-13 20:52:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:24,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:52:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:52:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:52:24,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 656 [2022-12-13 20:52:24,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:24,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:24,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 656 [2022-12-13 20:52:24,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:25,879 INFO L130 PetriNetUnfolder]: 1931/2894 cut-off events. [2022-12-13 20:52:25,879 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-12-13 20:52:25,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5772 conditions, 2894 events. 1931/2894 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 16329 event pairs, 1156 based on Foata normal form. 0/936 useless extension candidates. Maximal degree in co-relation 2626. Up to 1411 conditions per place. [2022-12-13 20:52:25,899 INFO L137 encePairwiseOnDemand]: 645/656 looper letters, 103 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2022-12-13 20:52:25,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 113 transitions, 470 flow [2022-12-13 20:52:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:52:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:52:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 922 transitions. [2022-12-13 20:52:25,921 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4684959349593496 [2022-12-13 20:52:25,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 922 transitions. [2022-12-13 20:52:25,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 922 transitions. [2022-12-13 20:52:25,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:25,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 922 transitions. [2022-12-13 20:52:25,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:25,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:25,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:25,943 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 134 flow. Second operand 3 states and 922 transitions. [2022-12-13 20:52:25,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 113 transitions, 470 flow [2022-12-13 20:52:25,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 454 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 20:52:25,951 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 182 flow [2022-12-13 20:52:25,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2022-12-13 20:52:25,956 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2022-12-13 20:52:25,957 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 182 flow [2022-12-13 20:52:25,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:25,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:25,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 20:52:25,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:26,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:26,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 36633, now seen corresponding path program 1 times [2022-12-13 20:52:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611636801] [2022-12-13 20:52:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:26,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:26,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:26,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 20:52:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:26,300 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:52:26,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:52:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:26,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:26,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611636801] [2022-12-13 20:52:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611636801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:26,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:52:26,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 20:52:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161048506] [2022-12-13 20:52:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:52:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:52:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:52:26,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 656 [2022-12-13 20:52:26,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:26,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:26,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 656 [2022-12-13 20:52:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:27,328 INFO L130 PetriNetUnfolder]: 1931/2888 cut-off events. [2022-12-13 20:52:27,329 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 20:52:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5741 conditions, 2888 events. 1931/2888 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 16411 event pairs, 1156 based on Foata normal form. 4/923 useless extension candidates. Maximal degree in co-relation 2844. Up to 2808 conditions per place. [2022-12-13 20:52:27,338 INFO L137 encePairwiseOnDemand]: 652/656 looper letters, 59 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-12-13 20:52:27,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 296 flow [2022-12-13 20:52:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:52:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:52:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 867 transitions. [2022-12-13 20:52:27,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4405487804878049 [2022-12-13 20:52:27,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 867 transitions. [2022-12-13 20:52:27,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 867 transitions. [2022-12-13 20:52:27,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:27,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 867 transitions. [2022-12-13 20:52:27,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,349 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 182 flow. Second operand 3 states and 867 transitions. [2022-12-13 20:52:27,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 296 flow [2022-12-13 20:52:27,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:52:27,350 INFO L231 Difference]: Finished difference. Result has 57 places, 63 transitions, 164 flow [2022-12-13 20:52:27,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=57, PETRI_TRANSITIONS=63} [2022-12-13 20:52:27,351 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2022-12-13 20:52:27,351 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 63 transitions, 164 flow [2022-12-13 20:52:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:27,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:27,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 20:52:27,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:52:27,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:27,553 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1142277, now seen corresponding path program 1 times [2022-12-13 20:52:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:27,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688124003] [2022-12-13 20:52:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:27,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:27,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:27,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:27,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:27,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:52:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:27,803 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:52:27,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:52:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:27,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:52:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:28,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688124003] [2022-12-13 20:52:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688124003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:52:28,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:52:28,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 20:52:28,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432653964] [2022-12-13 20:52:28,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:52:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:52:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:52:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:52:30,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 656 [2022-12-13 20:52:30,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 63 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:30,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:30,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 656 [2022-12-13 20:52:30,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:32,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:52:34,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:52:35,804 INFO L130 PetriNetUnfolder]: 2906/4346 cut-off events. [2022-12-13 20:52:35,805 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-13 20:52:35,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 4346 events. 2906/4346 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 25902 event pairs, 1734 based on Foata normal form. 0/1429 useless extension candidates. Maximal degree in co-relation 8628. Up to 1410 conditions per place. [2022-12-13 20:52:35,821 INFO L137 encePairwiseOnDemand]: 643/656 looper letters, 141 selfloop transitions, 29 changer transitions 0/173 dead transitions. [2022-12-13 20:52:35,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 173 transitions, 764 flow [2022-12-13 20:52:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:52:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:52:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1703 transitions. [2022-12-13 20:52:35,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4326727642276423 [2022-12-13 20:52:35,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1703 transitions. [2022-12-13 20:52:35,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1703 transitions. [2022-12-13 20:52:35,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:35,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1703 transitions. [2022-12-13 20:52:35,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.8333333333333) internal successors, (1703), 6 states have internal predecessors, (1703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:35,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:35,838 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:35,838 INFO L175 Difference]: Start difference. First operand has 57 places, 63 transitions, 164 flow. Second operand 6 states and 1703 transitions. [2022-12-13 20:52:35,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 173 transitions, 764 flow [2022-12-13 20:52:35,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 173 transitions, 763 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:35,841 INFO L231 Difference]: Finished difference. Result has 65 places, 85 transitions, 382 flow [2022-12-13 20:52:35,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=65, PETRI_TRANSITIONS=85} [2022-12-13 20:52:35,841 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2022-12-13 20:52:35,841 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 85 transitions, 382 flow [2022-12-13 20:52:35,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:35,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:35,842 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:52:35,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 20:52:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:36,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 35483046, now seen corresponding path program 1 times [2022-12-13 20:52:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847665832] [2022-12-13 20:52:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:36,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:36,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:36,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:52:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:36,273 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:52:36,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 20:52:36,289 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 [2022-12-13 20:52:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:36,327 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 [2022-12-13 20:52:36,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:36,356 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 [2022-12-13 20:52:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:36,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:36,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847665832] [2022-12-13 20:52:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847665832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:36,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:52:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:52:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068423110] [2022-12-13 20:52:36,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:52:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:52:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:52:36,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 656 [2022-12-13 20:52:36,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 85 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:36,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:36,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 656 [2022-12-13 20:52:36,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:37,766 INFO L130 PetriNetUnfolder]: 2186/3335 cut-off events. [2022-12-13 20:52:37,766 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-12-13 20:52:37,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3335 events. 2186/3335 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 19735 event pairs, 1284 based on Foata normal form. 0/1172 useless extension candidates. Maximal degree in co-relation 6713. Up to 3239 conditions per place. [2022-12-13 20:52:37,777 INFO L137 encePairwiseOnDemand]: 653/656 looper letters, 79 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2022-12-13 20:52:37,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 538 flow [2022-12-13 20:52:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:52:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:52:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 879 transitions. [2022-12-13 20:52:37,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44664634146341464 [2022-12-13 20:52:37,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 879 transitions. [2022-12-13 20:52:37,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 879 transitions. [2022-12-13 20:52:37,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:37,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 879 transitions. [2022-12-13 20:52:37,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:37,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:37,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:37,787 INFO L175 Difference]: Start difference. First operand has 65 places, 85 transitions, 382 flow. Second operand 3 states and 879 transitions. [2022-12-13 20:52:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 538 flow [2022-12-13 20:52:37,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 503 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:37,790 INFO L231 Difference]: Finished difference. Result has 64 places, 83 transitions, 345 flow [2022-12-13 20:52:37,790 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=64, PETRI_TRANSITIONS=83} [2022-12-13 20:52:37,790 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2022-12-13 20:52:37,791 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 83 transitions, 345 flow [2022-12-13 20:52:37,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:37,791 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:37,791 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 20:52:37,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 20:52:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:37,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 35483045, now seen corresponding path program 1 times [2022-12-13 20:52:37,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:37,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278368829] [2022-12-13 20:52:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:37,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:37,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:37,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:52:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:38,202 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-13 20:52:38,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-12-13 20:52:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:38,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:52:38,288 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 20:52:38,288 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 [2022-12-13 20:52:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:38,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:38,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:38,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278368829] [2022-12-13 20:52:38,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278368829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:38,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:52:38,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:52:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850956155] [2022-12-13 20:52:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:52:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:52:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:52:38,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 656 [2022-12-13 20:52:38,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 83 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:38,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:38,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 656 [2022-12-13 20:52:38,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:39,653 INFO L130 PetriNetUnfolder]: 1466/2324 cut-off events. [2022-12-13 20:52:39,653 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-12-13 20:52:39,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 2324 events. 1466/2324 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 13487 event pairs, 834 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 4697. Up to 2252 conditions per place. [2022-12-13 20:52:39,659 INFO L137 encePairwiseOnDemand]: 653/656 looper letters, 77 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-12-13 20:52:39,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 497 flow [2022-12-13 20:52:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:52:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:52:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2022-12-13 20:52:39,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4486788617886179 [2022-12-13 20:52:39,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2022-12-13 20:52:39,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2022-12-13 20:52:39,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:39,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2022-12-13 20:52:39,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:39,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:39,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:39,668 INFO L175 Difference]: Start difference. First operand has 64 places, 83 transitions, 345 flow. Second operand 3 states and 883 transitions. [2022-12-13 20:52:39,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 497 flow [2022-12-13 20:52:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:39,670 INFO L231 Difference]: Finished difference. Result has 63 places, 81 transitions, 342 flow [2022-12-13 20:52:39,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=63, PETRI_TRANSITIONS=81} [2022-12-13 20:52:39,671 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2022-12-13 20:52:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 81 transitions, 342 flow [2022-12-13 20:52:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.0) internal successors, (1112), 4 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:39,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:39,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:52:39,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:39,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:39,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978902, now seen corresponding path program 1 times [2022-12-13 20:52:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:39,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026750005] [2022-12-13 20:52:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:52:39,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:39,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:52:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:52:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:40,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:52:40,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:52:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:52:40,160 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 [2022-12-13 20:52:40,170 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:52:40,170 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 [2022-12-13 20:52:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:40,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:52:40,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026750005] [2022-12-13 20:52:40,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026750005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:52:40,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:52:40,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:52:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618960293] [2022-12-13 20:52:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:52:40,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:52:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:52:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:52:41,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 656 [2022-12-13 20:52:41,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 81 transitions, 342 flow. Second operand has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:41,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:41,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 656 [2022-12-13 20:52:41,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:42,913 INFO L130 PetriNetUnfolder]: 2132/3337 cut-off events. [2022-12-13 20:52:42,913 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 20:52:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 3337 events. 2132/3337 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 19867 event pairs, 956 based on Foata normal form. 0/1389 useless extension candidates. Maximal degree in co-relation 6730. Up to 2252 conditions per place. [2022-12-13 20:52:42,922 INFO L137 encePairwiseOnDemand]: 639/656 looper letters, 129 selfloop transitions, 18 changer transitions 0/150 dead transitions. [2022-12-13 20:52:42,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 150 transitions, 824 flow [2022-12-13 20:52:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:52:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:52:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1441 transitions. [2022-12-13 20:52:42,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43932926829268293 [2022-12-13 20:52:42,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1441 transitions. [2022-12-13 20:52:42,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1441 transitions. [2022-12-13 20:52:42,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:52:42,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1441 transitions. [2022-12-13 20:52:42,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 288.2) internal successors, (1441), 5 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:42,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 656.0) internal successors, (3936), 6 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:42,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 656.0) internal successors, (3936), 6 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:42,930 INFO L175 Difference]: Start difference. First operand has 63 places, 81 transitions, 342 flow. Second operand 5 states and 1441 transitions. [2022-12-13 20:52:42,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 150 transitions, 824 flow [2022-12-13 20:52:42,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 150 transitions, 823 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:52:42,933 INFO L231 Difference]: Finished difference. Result has 68 places, 93 transitions, 491 flow [2022-12-13 20:52:42,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=491, PETRI_PLACES=68, PETRI_TRANSITIONS=93} [2022-12-13 20:52:42,933 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2022-12-13 20:52:42,933 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 93 transitions, 491 flow [2022-12-13 20:52:42,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:42,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:52:42,934 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 20:52:42,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:52:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:43,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:52:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:52:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -323495273, now seen corresponding path program 2 times [2022-12-13 20:52:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:52:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226410989] [2022-12-13 20:52:43,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:52:43,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:52:43,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:52:43,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:52:43,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:52:43,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:52:43,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:52:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:52:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:52:43,371 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:52:43,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:52:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:43,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:52:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:52:44,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:52:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226410989] [2022-12-13 20:52:44,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226410989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:52:44,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:52:44,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:52:44,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647917947] [2022-12-13 20:52:44,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:52:44,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:52:44,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:52:44,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:52:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:52:52,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 656 [2022-12-13 20:52:52,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 93 transitions, 491 flow. Second operand has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:52:52,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:52:52,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 656 [2022-12-13 20:52:52,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:52:56,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:52:58,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:00,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:02,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:03,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:06,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:08,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:09,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:11,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:14,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:16,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:17,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:19,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:53:29,312 INFO L130 PetriNetUnfolder]: 6187/9720 cut-off events. [2022-12-13 20:53:29,312 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-13 20:53:29,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21098 conditions, 9720 events. 6187/9720 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 65639 event pairs, 3492 based on Foata normal form. 17/4545 useless extension candidates. Maximal degree in co-relation 21080. Up to 1724 conditions per place. [2022-12-13 20:53:29,340 INFO L137 encePairwiseOnDemand]: 643/656 looper letters, 430 selfloop transitions, 70 changer transitions 0/503 dead transitions. [2022-12-13 20:53:29,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 503 transitions, 3029 flow [2022-12-13 20:53:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:53:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 20:53:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4339 transitions. [2022-12-13 20:53:29,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44095528455284555 [2022-12-13 20:53:29,354 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4339 transitions. [2022-12-13 20:53:29,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4339 transitions. [2022-12-13 20:53:29,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:53:29,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4339 transitions. [2022-12-13 20:53:29,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 289.26666666666665) internal successors, (4339), 15 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:29,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 656.0) internal successors, (10496), 16 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:29,371 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 656.0) internal successors, (10496), 16 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:29,371 INFO L175 Difference]: Start difference. First operand has 68 places, 93 transitions, 491 flow. Second operand 15 states and 4339 transitions. [2022-12-13 20:53:29,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 503 transitions, 3029 flow [2022-12-13 20:53:29,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 503 transitions, 3007 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:53:29,385 INFO L231 Difference]: Finished difference. Result has 89 places, 139 transitions, 1095 flow [2022-12-13 20:53:29,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1095, PETRI_PLACES=89, PETRI_TRANSITIONS=139} [2022-12-13 20:53:29,386 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 28 predicate places. [2022-12-13 20:53:29,386 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 139 transitions, 1095 flow [2022-12-13 20:53:29,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:29,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:53:29,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:53:29,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:53:29,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:29,588 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:53:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash -260505197, now seen corresponding path program 1 times [2022-12-13 20:53:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:53:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068559814] [2022-12-13 20:53:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:29,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:53:29,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:53:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:53:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:29,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:53:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:29,920 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 20:53:29,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 20:53:29,932 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 42 treesize of output 38 [2022-12-13 20:53:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:29,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 20:53:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:29,996 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 [2022-12-13 20:53:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:30,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:53:30,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:53:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068559814] [2022-12-13 20:53:30,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068559814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:30,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:30,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:53:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865518444] [2022-12-13 20:53:30,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:53:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:53:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:53:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:53:30,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 656 [2022-12-13 20:53:30,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 139 transitions, 1095 flow. Second operand has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:30,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:53:30,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 656 [2022-12-13 20:53:30,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:53:32,137 INFO L130 PetriNetUnfolder]: 5875/9176 cut-off events. [2022-12-13 20:53:32,137 INFO L131 PetriNetUnfolder]: For 1065/1065 co-relation queries the response was YES. [2022-12-13 20:53:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20158 conditions, 9176 events. 5875/9176 cut-off events. For 1065/1065 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 61448 event pairs, 3294 based on Foata normal form. 0/4331 useless extension candidates. Maximal degree in co-relation 20131. Up to 8878 conditions per place. [2022-12-13 20:53:32,165 INFO L137 encePairwiseOnDemand]: 653/656 looper letters, 133 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2022-12-13 20:53:32,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 1359 flow [2022-12-13 20:53:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:53:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2022-12-13 20:53:32,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4415650406504065 [2022-12-13 20:53:32,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2022-12-13 20:53:32,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2022-12-13 20:53:32,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:53:32,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2022-12-13 20:53:32,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:32,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:32,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:32,174 INFO L175 Difference]: Start difference. First operand has 89 places, 139 transitions, 1095 flow. Second operand 3 states and 869 transitions. [2022-12-13 20:53:32,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 1359 flow [2022-12-13 20:53:32,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1274 flow, removed 25 selfloop flow, removed 2 redundant places. [2022-12-13 20:53:32,186 INFO L231 Difference]: Finished difference. Result has 87 places, 137 transitions, 1008 flow [2022-12-13 20:53:32,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1008, PETRI_PLACES=87, PETRI_TRANSITIONS=137} [2022-12-13 20:53:32,187 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 26 predicate places. [2022-12-13 20:53:32,187 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 137 transitions, 1008 flow [2022-12-13 20:53:32,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:32,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:53:32,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 20:53:32,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:53:32,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:32,389 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:53:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash -260505198, now seen corresponding path program 1 times [2022-12-13 20:53:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:53:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696410327] [2022-12-13 20:53:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:32,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:53:32,390 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:53:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:53:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:53:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:32,606 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 20:53:32,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-12-13 20:53:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:32,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:53:32,678 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 20:53:32,678 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 [2022-12-13 20:53:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:32,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:53:32,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:53:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696410327] [2022-12-13 20:53:32,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696410327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:32,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:32,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:53:32,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136673841] [2022-12-13 20:53:32,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:32,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:53:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:53:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:53:32,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:53:33,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 656 [2022-12-13 20:53:33,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 137 transitions, 1008 flow. Second operand has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:33,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:53:33,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 656 [2022-12-13 20:53:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:53:34,785 INFO L130 PetriNetUnfolder]: 5563/8630 cut-off events. [2022-12-13 20:53:34,786 INFO L131 PetriNetUnfolder]: For 1079/1079 co-relation queries the response was YES. [2022-12-13 20:53:34,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18942 conditions, 8630 events. 5563/8630 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 56767 event pairs, 3096 based on Foata normal form. 0/4208 useless extension candidates. Maximal degree in co-relation 18914. Up to 8332 conditions per place. [2022-12-13 20:53:34,812 INFO L137 encePairwiseOnDemand]: 653/656 looper letters, 131 selfloop transitions, 1 changer transitions 0/135 dead transitions. [2022-12-13 20:53:34,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 135 transitions, 1268 flow [2022-12-13 20:53:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:53:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2022-12-13 20:53:34,817 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2022-12-13 20:53:34,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2022-12-13 20:53:34,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2022-12-13 20:53:34,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:53:34,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2022-12-13 20:53:34,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:34,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:34,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:34,821 INFO L175 Difference]: Start difference. First operand has 87 places, 137 transitions, 1008 flow. Second operand 3 states and 864 transitions. [2022-12-13 20:53:34,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 135 transitions, 1268 flow [2022-12-13 20:53:34,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1267 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:53:34,833 INFO L231 Difference]: Finished difference. Result has 86 places, 135 transitions, 1005 flow [2022-12-13 20:53:34,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=86, PETRI_TRANSITIONS=135} [2022-12-13 20:53:34,833 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 25 predicate places. [2022-12-13 20:53:34,833 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 135 transitions, 1005 flow [2022-12-13 20:53:34,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.5) internal successors, (1094), 4 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:34,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:53:34,834 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:34,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:53:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:35,034 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:53:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 514264626, now seen corresponding path program 1 times [2022-12-13 20:53:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:53:35,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902708343] [2022-12-13 20:53:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:35,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:35,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:53:35,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:53:35,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:53:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:53:35,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:35,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:53:35,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:53:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902708343] [2022-12-13 20:53:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902708343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:35,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:35,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:53:35,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021556611] [2022-12-13 20:53:35,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:35,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:35,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:53:35,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:35,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:53:37,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 656 [2022-12-13 20:53:37,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 135 transitions, 1005 flow. Second operand has 6 states, 6 states have (on average 275.1666666666667) internal successors, (1651), 6 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:37,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:53:37,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 656 [2022-12-13 20:53:37,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:53:41,360 INFO L130 PetriNetUnfolder]: 3541/6270 cut-off events. [2022-12-13 20:53:41,360 INFO L131 PetriNetUnfolder]: For 999/999 co-relation queries the response was YES. [2022-12-13 20:53:41,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14085 conditions, 6270 events. 3541/6270 cut-off events. For 999/999 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 42190 event pairs, 2486 based on Foata normal form. 0/3872 useless extension candidates. Maximal degree in co-relation 14056. Up to 5403 conditions per place. [2022-12-13 20:53:41,377 INFO L137 encePairwiseOnDemand]: 646/656 looper letters, 168 selfloop transitions, 18 changer transitions 0/188 dead transitions. [2022-12-13 20:53:41,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 188 transitions, 1600 flow [2022-12-13 20:53:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:53:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:53:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1738 transitions. [2022-12-13 20:53:41,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4415650406504065 [2022-12-13 20:53:41,384 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1738 transitions. [2022-12-13 20:53:41,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1738 transitions. [2022-12-13 20:53:41,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:53:41,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1738 transitions. [2022-12-13 20:53:41,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 289.6666666666667) internal successors, (1738), 6 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,389 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,389 INFO L175 Difference]: Start difference. First operand has 86 places, 135 transitions, 1005 flow. Second operand 6 states and 1738 transitions. [2022-12-13 20:53:41,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 188 transitions, 1600 flow [2022-12-13 20:53:41,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 188 transitions, 1599 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:53:41,402 INFO L231 Difference]: Finished difference. Result has 93 places, 137 transitions, 1077 flow [2022-12-13 20:53:41,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1077, PETRI_PLACES=93, PETRI_TRANSITIONS=137} [2022-12-13 20:53:41,402 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 32 predicate places. [2022-12-13 20:53:41,402 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 137 transitions, 1077 flow [2022-12-13 20:53:41,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 275.1666666666667) internal successors, (1651), 6 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:53:41,403 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-13 20:53:41,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:53:41,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:41,604 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:53:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash 517849812, now seen corresponding path program 1 times [2022-12-13 20:53:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:53:41,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584004730] [2022-12-13 20:53:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:41,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:53:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:53:41,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:53:41,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:53:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 20:53:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:41,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:53:41,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:53:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:41,921 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 [2022-12-13 20:53:41,932 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:53:41,932 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 [2022-12-13 20:53:42,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:42,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 20:53:42,030 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:53:42,030 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 [2022-12-13 20:53:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:42,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:53:42,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2022-12-13 20:53:46,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:46,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:53:46,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584004730] [2022-12-13 20:53:46,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584004730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:53:46,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:53:46,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 20:53:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696567166] [2022-12-13 20:53:46,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:53:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:53:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:53:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:53:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2022-12-13 20:53:49,091 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 [1] [2022-12-13 20:53:57,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:53:59,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:02,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:04,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:06,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:09,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:11,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:13,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:15,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:17,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:20,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:22,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:24,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:27,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:33,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:35,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:37,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:40,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:42,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:44,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:47,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:49,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:51,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:53,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:59,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:54:59,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 656 [2022-12-13 20:54:59,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 137 transitions, 1077 flow. Second operand has 11 states, 11 states have (on average 237.27272727272728) internal successors, (2610), 11 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:54:59,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:54:59,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 656 [2022-12-13 20:54:59,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:55:16,116 WARN L233 SmtUtils]: Spent 15.88s on a formula simplification. DAG size of input: 67 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:55:33,887 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:55:40,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:55:49,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:55:51,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:55:52,243 INFO L130 PetriNetUnfolder]: 12924/20275 cut-off events. [2022-12-13 20:55:52,244 INFO L131 PetriNetUnfolder]: For 3944/3998 co-relation queries the response was YES. [2022-12-13 20:55:52,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50654 conditions, 20275 events. 12924/20275 cut-off events. For 3944/3998 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 154367 event pairs, 7188 based on Foata normal form. 244/11787 useless extension candidates. Maximal degree in co-relation 50621. Up to 6701 conditions per place. [2022-12-13 20:55:52,318 INFO L137 encePairwiseOnDemand]: 638/656 looper letters, 255 selfloop transitions, 82 changer transitions 0/341 dead transitions. [2022-12-13 20:55:52,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 341 transitions, 3037 flow [2022-12-13 20:55:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:55:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 20:55:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3244 transitions. [2022-12-13 20:55:52,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3803939962476548 [2022-12-13 20:55:52,331 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3244 transitions. [2022-12-13 20:55:52,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3244 transitions. [2022-12-13 20:55:52,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:55:52,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3244 transitions. [2022-12-13 20:55:52,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 249.53846153846155) internal successors, (3244), 13 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:52,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 656.0) internal successors, (9184), 14 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:52,340 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 656.0) internal successors, (9184), 14 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:52,340 INFO L175 Difference]: Start difference. First operand has 93 places, 137 transitions, 1077 flow. Second operand 13 states and 3244 transitions. [2022-12-13 20:55:52,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 341 transitions, 3037 flow [2022-12-13 20:55:52,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 341 transitions, 3020 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 20:55:52,385 INFO L231 Difference]: Finished difference. Result has 109 places, 193 transitions, 1959 flow [2022-12-13 20:55:52,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1959, PETRI_PLACES=109, PETRI_TRANSITIONS=193} [2022-12-13 20:55:52,385 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 48 predicate places. [2022-12-13 20:55:52,385 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 193 transitions, 1959 flow [2022-12-13 20:55:52,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 237.27272727272728) internal successors, (2610), 11 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:52,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:55:52,386 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2022-12-13 20:55:52,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:55:52,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:55:52,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:55:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:55:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -562457199, now seen corresponding path program 1 times [2022-12-13 20:55:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:55:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326847193] [2022-12-13 20:55:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:55:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:55:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:55:52,592 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:55:52,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:55:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:55:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:55:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:55:52,850 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 20:55:52,850 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 [2022-12-13 20:55:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:55:52,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:55:52,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:55:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326847193] [2022-12-13 20:55:52,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326847193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:55:52,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:55:52,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:55:52,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786711409] [2022-12-13 20:55:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:55:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:55:52,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:55:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:55:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:55:53,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 656 [2022-12-13 20:55:53,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 193 transitions, 1959 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:53,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:55:53,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 656 [2022-12-13 20:55:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:55:55,638 INFO L130 PetriNetUnfolder]: 12201/19168 cut-off events. [2022-12-13 20:55:55,638 INFO L131 PetriNetUnfolder]: For 5435/5489 co-relation queries the response was YES. [2022-12-13 20:55:55,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 19168 events. 12201/19168 cut-off events. For 5435/5489 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 145234 event pairs, 6816 based on Foata normal form. 447/11015 useless extension candidates. Maximal degree in co-relation 47404. Up to 18369 conditions per place. [2022-12-13 20:55:55,709 INFO L137 encePairwiseOnDemand]: 652/656 looper letters, 166 selfloop transitions, 9 changer transitions 0/179 dead transitions. [2022-12-13 20:55:55,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 179 transitions, 2121 flow [2022-12-13 20:55:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:55:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:55:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2022-12-13 20:55:55,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4410569105691057 [2022-12-13 20:55:55,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2022-12-13 20:55:55,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2022-12-13 20:55:55,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:55:55,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2022-12-13 20:55:55,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:55,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:55,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 656.0) internal successors, (2624), 4 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:55,718 INFO L175 Difference]: Start difference. First operand has 109 places, 193 transitions, 1959 flow. Second operand 3 states and 868 transitions. [2022-12-13 20:55:55,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 179 transitions, 2121 flow [2022-12-13 20:55:55,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 2013 flow, removed 36 selfloop flow, removed 3 redundant places. [2022-12-13 20:55:55,765 INFO L231 Difference]: Finished difference. Result has 104 places, 179 transitions, 1681 flow [2022-12-13 20:55:55,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1681, PETRI_PLACES=104, PETRI_TRANSITIONS=179} [2022-12-13 20:55:55,766 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 43 predicate places. [2022-12-13 20:55:55,766 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 179 transitions, 1681 flow [2022-12-13 20:55:55,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:55:55,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:55:55,766 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2022-12-13 20:55:55,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:55:55,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:55:55,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:55:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:55:55,969 INFO L85 PathProgramCache]: Analyzing trace with hash 934523964, now seen corresponding path program 1 times [2022-12-13 20:55:55,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:55:55,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451839736] [2022-12-13 20:55:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:55:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:55:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:55:55,973 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:55:55,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:55:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:55:56,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:55:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:55:56,196 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 8 treesize of output 7 [2022-12-13 20:55:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:55:56,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:55:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:55:57,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:55:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451839736] [2022-12-13 20:55:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451839736] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:55:57,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:55:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2022-12-13 20:55:57,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501268935] [2022-12-13 20:55:57,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:55:57,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:55:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:55:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:55:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:56:10,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 656 [2022-12-13 20:56:10,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 179 transitions, 1681 flow. Second operand has 15 states, 15 states have (on average 253.13333333333333) internal successors, (3797), 15 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:10,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:56:10,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 656 [2022-12-13 20:56:10,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:56:11,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:56:18,419 INFO L130 PetriNetUnfolder]: 12442/19591 cut-off events. [2022-12-13 20:56:18,419 INFO L131 PetriNetUnfolder]: For 3287/3398 co-relation queries the response was YES. [2022-12-13 20:56:18,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48428 conditions, 19591 events. 12442/19591 cut-off events. For 3287/3398 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 149004 event pairs, 6972 based on Foata normal form. 113/11186 useless extension candidates. Maximal degree in co-relation 48389. Up to 18379 conditions per place. [2022-12-13 20:56:18,493 INFO L137 encePairwiseOnDemand]: 647/656 looper letters, 220 selfloop transitions, 36 changer transitions 0/260 dead transitions. [2022-12-13 20:56:18,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 260 transitions, 2645 flow [2022-12-13 20:56:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:56:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 20:56:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3142 transitions. [2022-12-13 20:56:18,501 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3991361788617886 [2022-12-13 20:56:18,501 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3142 transitions. [2022-12-13 20:56:18,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3142 transitions. [2022-12-13 20:56:18,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:56:18,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3142 transitions. [2022-12-13 20:56:18,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 261.8333333333333) internal successors, (3142), 12 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:18,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 656.0) internal successors, (8528), 13 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:18,511 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 656.0) internal successors, (8528), 13 states have internal predecessors, (8528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:18,511 INFO L175 Difference]: Start difference. First operand has 104 places, 179 transitions, 1681 flow. Second operand 12 states and 3142 transitions. [2022-12-13 20:56:18,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 260 transitions, 2645 flow [2022-12-13 20:56:18,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 260 transitions, 2628 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 20:56:18,569 INFO L231 Difference]: Finished difference. Result has 120 places, 196 transitions, 1992 flow [2022-12-13 20:56:18,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1992, PETRI_PLACES=120, PETRI_TRANSITIONS=196} [2022-12-13 20:56:18,570 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 59 predicate places. [2022-12-13 20:56:18,570 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 196 transitions, 1992 flow [2022-12-13 20:56:18,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 253.13333333333333) internal successors, (3797), 15 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:18,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:56:18,570 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:56:18,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 20:56:18,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:18,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:56:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:56:18,772 INFO L85 PathProgramCache]: Analyzing trace with hash -566042384, now seen corresponding path program 1 times [2022-12-13 20:56:18,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:56:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875706716] [2022-12-13 20:56:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:56:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:56:18,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:56:18,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:56:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:56:18,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:56:18,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:56:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:56:19,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:56:19,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:56:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875706716] [2022-12-13 20:56:19,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875706716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:56:19,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:56:19,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:56:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682652022] [2022-12-13 20:56:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:56:19,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:56:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:56:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:56:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:56:19,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 656 [2022-12-13 20:56:19,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 196 transitions, 1992 flow. Second operand has 5 states, 5 states have (on average 268.8) internal successors, (1344), 5 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:19,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:56:19,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 656 [2022-12-13 20:56:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:56:23,897 INFO L130 PetriNetUnfolder]: 13383/23677 cut-off events. [2022-12-13 20:56:23,897 INFO L131 PetriNetUnfolder]: For 6149/6149 co-relation queries the response was YES. [2022-12-13 20:56:23,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57315 conditions, 23677 events. 13383/23677 cut-off events. For 6149/6149 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 200421 event pairs, 7741 based on Foata normal form. 660/16491 useless extension candidates. Maximal degree in co-relation 57269. Up to 16496 conditions per place. [2022-12-13 20:56:24,006 INFO L137 encePairwiseOnDemand]: 644/656 looper letters, 352 selfloop transitions, 20 changer transitions 0/374 dead transitions. [2022-12-13 20:56:24,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 374 transitions, 4084 flow [2022-12-13 20:56:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:56:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 20:56:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2006 transitions. [2022-12-13 20:56:24,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4368466898954704 [2022-12-13 20:56:24,013 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2006 transitions. [2022-12-13 20:56:24,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2006 transitions. [2022-12-13 20:56:24,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:56:24,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2006 transitions. [2022-12-13 20:56:24,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 286.57142857142856) internal successors, (2006), 7 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:24,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 656.0) internal successors, (5248), 8 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:24,019 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 656.0) internal successors, (5248), 8 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:24,019 INFO L175 Difference]: Start difference. First operand has 120 places, 196 transitions, 1992 flow. Second operand 7 states and 2006 transitions. [2022-12-13 20:56:24,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 374 transitions, 4084 flow [2022-12-13 20:56:24,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 374 transitions, 4062 flow, removed 11 selfloop flow, removed 0 redundant places. [2022-12-13 20:56:24,092 INFO L231 Difference]: Finished difference. Result has 129 places, 198 transitions, 2042 flow [2022-12-13 20:56:24,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2042, PETRI_PLACES=129, PETRI_TRANSITIONS=198} [2022-12-13 20:56:24,093 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 68 predicate places. [2022-12-13 20:56:24,093 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 198 transitions, 2042 flow [2022-12-13 20:56:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.8) internal successors, (1344), 5 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:24,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:56:24,093 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:56:24,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:56:24,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:24,295 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:56:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:56:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 597679784, now seen corresponding path program 1 times [2022-12-13 20:56:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:56:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367636544] [2022-12-13 20:56:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:56:24,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:56:24,300 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:56:24,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:56:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:56:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:56:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:56:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:56:24,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:56:24,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:56:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367636544] [2022-12-13 20:56:24,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367636544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:56:24,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:56:24,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:56:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764633509] [2022-12-13 20:56:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:56:24,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:56:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:56:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:56:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:56:24,970 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 656 [2022-12-13 20:56:24,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 2042 flow. Second operand has 6 states, 6 states have (on average 276.6666666666667) internal successors, (1660), 6 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:24,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:56:24,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 656 [2022-12-13 20:56:24,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:56:29,068 INFO L130 PetriNetUnfolder]: 14260/23525 cut-off events. [2022-12-13 20:56:29,068 INFO L131 PetriNetUnfolder]: For 7922/8546 co-relation queries the response was YES. [2022-12-13 20:56:29,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64730 conditions, 23525 events. 14260/23525 cut-off events. For 7922/8546 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 192471 event pairs, 8802 based on Foata normal form. 628/14999 useless extension candidates. Maximal degree in co-relation 64679. Up to 22656 conditions per place. [2022-12-13 20:56:29,187 INFO L137 encePairwiseOnDemand]: 645/656 looper letters, 172 selfloop transitions, 24 changer transitions 17/216 dead transitions. [2022-12-13 20:56:29,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2553 flow [2022-12-13 20:56:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:56:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 20:56:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1719 transitions. [2022-12-13 20:56:29,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367378048780488 [2022-12-13 20:56:29,193 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1719 transitions. [2022-12-13 20:56:29,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1719 transitions. [2022-12-13 20:56:29,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:56:29,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1719 transitions. [2022-12-13 20:56:29,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:29,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:29,199 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 656.0) internal successors, (4592), 7 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:29,199 INFO L175 Difference]: Start difference. First operand has 129 places, 198 transitions, 2042 flow. Second operand 6 states and 1719 transitions. [2022-12-13 20:56:29,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2553 flow [2022-12-13 20:56:29,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2541 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 20:56:29,408 INFO L231 Difference]: Finished difference. Result has 136 places, 187 transitions, 2011 flow [2022-12-13 20:56:29,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2011, PETRI_PLACES=136, PETRI_TRANSITIONS=187} [2022-12-13 20:56:29,408 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 75 predicate places. [2022-12-13 20:56:29,408 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 187 transitions, 2011 flow [2022-12-13 20:56:29,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 276.6666666666667) internal successors, (1660), 6 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:29,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:56:29,409 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1] [2022-12-13 20:56:29,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 20:56:29,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:29,610 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:56:29,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:56:29,611 INFO L85 PathProgramCache]: Analyzing trace with hash -36249988, now seen corresponding path program 1 times [2022-12-13 20:56:29,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:56:29,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241923689] [2022-12-13 20:56:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:56:29,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:56:29,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:56:29,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:56:29,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:56:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:56:29,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:56:29,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:56:29,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:56:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:56:30,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:56:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:56:31,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:56:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241923689] [2022-12-13 20:56:31,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241923689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:56:31,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:56:31,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-12-13 20:56:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939545623] [2022-12-13 20:56:31,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:56:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 20:56:31,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:56:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 20:56:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:56:51,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 656 [2022-12-13 20:56:51,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 187 transitions, 2011 flow. Second operand has 19 states, 19 states have (on average 250.10526315789474) internal successors, (4752), 19 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:56:51,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:56:51,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 656 [2022-12-13 20:56:51,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:57:00,225 INFO L130 PetriNetUnfolder]: 14143/23315 cut-off events. [2022-12-13 20:57:00,225 INFO L131 PetriNetUnfolder]: For 8590/9160 co-relation queries the response was YES. [2022-12-13 20:57:00,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63031 conditions, 23315 events. 14143/23315 cut-off events. For 8590/9160 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 192875 event pairs, 8280 based on Foata normal form. 573/14858 useless extension candidates. Maximal degree in co-relation 62976. Up to 22312 conditions per place. [2022-12-13 20:57:00,364 INFO L137 encePairwiseOnDemand]: 647/656 looper letters, 141 selfloop transitions, 52 changer transitions 0/197 dead transitions. [2022-12-13 20:57:00,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 197 transitions, 2556 flow [2022-12-13 20:57:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:57:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 20:57:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5318 transitions. [2022-12-13 20:57:00,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3860336817653891 [2022-12-13 20:57:00,375 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5318 transitions. [2022-12-13 20:57:00,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5318 transitions. [2022-12-13 20:57:00,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:57:00,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5318 transitions. [2022-12-13 20:57:00,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 253.23809523809524) internal successors, (5318), 21 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:00,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 656.0) internal successors, (14432), 22 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:00,388 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 656.0) internal successors, (14432), 22 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:00,388 INFO L175 Difference]: Start difference. First operand has 136 places, 187 transitions, 2011 flow. Second operand 21 states and 5318 transitions. [2022-12-13 20:57:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 197 transitions, 2556 flow [2022-12-13 20:57:00,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 197 transitions, 2394 flow, removed 35 selfloop flow, removed 14 redundant places. [2022-12-13 20:57:00,573 INFO L231 Difference]: Finished difference. Result has 135 places, 197 transitions, 2139 flow [2022-12-13 20:57:00,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2139, PETRI_PLACES=135, PETRI_TRANSITIONS=197} [2022-12-13 20:57:00,574 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 74 predicate places. [2022-12-13 20:57:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 197 transitions, 2139 flow [2022-12-13 20:57:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 250.10526315789474) internal successors, (4752), 19 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:00,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:57:00,575 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:57:00,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 20:57:00,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:57:00,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:57:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:57:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2059131602, now seen corresponding path program 1 times [2022-12-13 20:57:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:57:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036444894] [2022-12-13 20:57:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:57:00,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:57:00,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:57:00,781 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:57:00,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:57:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:57:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:57:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:57:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:57:03,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:57:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:57:05,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:57:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036444894] [2022-12-13 20:57:05,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036444894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:57:05,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:57:05,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 20:57:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035766626] [2022-12-13 20:57:05,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:57:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:57:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:57:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:57:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:57:23,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 656 [2022-12-13 20:57:23,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 197 transitions, 2139 flow. Second operand has 18 states, 18 states have (on average 252.22222222222223) internal successors, (4540), 18 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:23,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:57:23,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 656 [2022-12-13 20:57:23,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:57:52,104 INFO L130 PetriNetUnfolder]: 25968/46696 cut-off events. [2022-12-13 20:57:52,104 INFO L131 PetriNetUnfolder]: For 13285/13285 co-relation queries the response was YES. [2022-12-13 20:57:52,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108337 conditions, 46696 events. 25968/46696 cut-off events. For 13285/13285 co-relation queries the response was YES. Maximal size of possible extension queue 2117. Compared 444419 event pairs, 11766 based on Foata normal form. 484/30487 useless extension candidates. Maximal degree in co-relation 108289. Up to 14425 conditions per place. [2022-12-13 20:57:52,374 INFO L137 encePairwiseOnDemand]: 631/656 looper letters, 430 selfloop transitions, 219 changer transitions 0/651 dead transitions. [2022-12-13 20:57:52,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 651 transitions, 6610 flow [2022-12-13 20:57:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 20:57:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 20:57:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 9104 transitions. [2022-12-13 20:57:52,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3965156794425087 [2022-12-13 20:57:52,388 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 9104 transitions. [2022-12-13 20:57:52,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 9104 transitions. [2022-12-13 20:57:52,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:57:52,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 9104 transitions. [2022-12-13 20:57:52,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 260.1142857142857) internal successors, (9104), 35 states have internal predecessors, (9104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:52,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 656.0) internal successors, (23616), 36 states have internal predecessors, (23616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:52,412 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 656.0) internal successors, (23616), 36 states have internal predecessors, (23616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:52,412 INFO L175 Difference]: Start difference. First operand has 135 places, 197 transitions, 2139 flow. Second operand 35 states and 9104 transitions. [2022-12-13 20:57:52,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 651 transitions, 6610 flow [2022-12-13 20:57:52,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 651 transitions, 6364 flow, removed 70 selfloop flow, removed 8 redundant places. [2022-12-13 20:57:52,631 INFO L231 Difference]: Finished difference. Result has 170 places, 377 transitions, 4789 flow [2022-12-13 20:57:52,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=4789, PETRI_PLACES=170, PETRI_TRANSITIONS=377} [2022-12-13 20:57:52,631 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 109 predicate places. [2022-12-13 20:57:52,631 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 377 transitions, 4789 flow [2022-12-13 20:57:52,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 252.22222222222223) internal successors, (4540), 18 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:57:52,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:57:52,632 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1] [2022-12-13 20:57:52,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 20:57:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:57:52,833 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:57:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:57:52,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1093848138, now seen corresponding path program 1 times [2022-12-13 20:57:52,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:57:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521289534] [2022-12-13 20:57:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:57:52,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:57:52,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:57:52,839 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:57:52,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:57:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:57:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 20:57:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:57:53,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:57:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:57:53,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:57:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:57:55,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:57:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521289534] [2022-12-13 20:57:55,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521289534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:57:55,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:57:55,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 20:57:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916784825] [2022-12-13 20:57:55,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:57:55,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:57:55,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:57:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:57:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:58:21,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 656 [2022-12-13 20:58:21,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 377 transitions, 4789 flow. Second operand has 18 states, 18 states have (on average 258.1666666666667) internal successors, (4647), 18 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:21,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:21,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 656 [2022-12-13 20:58:21,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:26,984 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 [] [2022-12-13 20:58:28,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:30,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:33,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:34,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:36,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:38,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:40,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:45,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:47,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:49,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:51,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:52,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:54,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:56,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:58:59,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:59:24,994 INFO L130 PetriNetUnfolder]: 46062/77109 cut-off events. [2022-12-13 20:59:24,994 INFO L131 PetriNetUnfolder]: For 91393/96722 co-relation queries the response was YES. [2022-12-13 20:59:25,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253737 conditions, 77109 events. 46062/77109 cut-off events. For 91393/96722 co-relation queries the response was YES. Maximal size of possible extension queue 3107. Compared 739259 event pairs, 27444 based on Foata normal form. 2770/47281 useless extension candidates. Maximal degree in co-relation 253682. Up to 19321 conditions per place. [2022-12-13 20:59:25,567 INFO L137 encePairwiseOnDemand]: 644/656 looper letters, 941 selfloop transitions, 295 changer transitions 0/1248 dead transitions. [2022-12-13 20:59:25,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1248 transitions, 14213 flow [2022-12-13 20:59:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 20:59:25,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 20:59:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 5511 transitions. [2022-12-13 20:59:25,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4421534017971759 [2022-12-13 20:59:25,578 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 5511 transitions. [2022-12-13 20:59:25,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 5511 transitions. [2022-12-13 20:59:25,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:59:25,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 5511 transitions. [2022-12-13 20:59:25,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 290.05263157894734) internal successors, (5511), 19 states have internal predecessors, (5511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:25,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 656.0) internal successors, (13120), 20 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:25,591 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 656.0) internal successors, (13120), 20 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:25,591 INFO L175 Difference]: Start difference. First operand has 170 places, 377 transitions, 4789 flow. Second operand 19 states and 5511 transitions. [2022-12-13 20:59:25,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1248 transitions, 14213 flow [2022-12-13 20:59:28,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1248 transitions, 14107 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 20:59:28,316 INFO L231 Difference]: Finished difference. Result has 193 places, 480 transitions, 7124 flow [2022-12-13 20:59:28,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7124, PETRI_PLACES=193, PETRI_TRANSITIONS=480} [2022-12-13 20:59:28,317 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 132 predicate places. [2022-12-13 20:59:28,317 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 480 transitions, 7124 flow [2022-12-13 20:59:28,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 258.1666666666667) internal successors, (4647), 18 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:28,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:59:28,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:59:28,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 20:59:28,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:59:28,519 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:59:28,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:59:28,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1220954587, now seen corresponding path program 1 times [2022-12-13 20:59:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:59:28,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920036443] [2022-12-13 20:59:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:59:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:59:28,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:59:28,525 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:59:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:59:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:59:28,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:59:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:59:28,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 20:59:28,819 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 20:59:28,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-13 20:59:28,855 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 20:59:28,855 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 [2022-12-13 20:59:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:59:28,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:59:28,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 20:59:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920036443] [2022-12-13 20:59:28,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920036443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:59:28,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:59:28,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:59:28,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464183020] [2022-12-13 20:59:28,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:59:28,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:59:28,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 20:59:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:59:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:59:29,980 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 656 [2022-12-13 20:59:29,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 480 transitions, 7124 flow. Second operand has 6 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:29,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:59:29,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 656 [2022-12-13 20:59:29,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:59:42,335 INFO L130 PetriNetUnfolder]: 41094/68129 cut-off events. [2022-12-13 20:59:42,335 INFO L131 PetriNetUnfolder]: For 83784/88895 co-relation queries the response was YES. [2022-12-13 20:59:42,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223790 conditions, 68129 events. 41094/68129 cut-off events. For 83784/88895 co-relation queries the response was YES. Maximal size of possible extension queue 2626. Compared 633101 event pairs, 24868 based on Foata normal form. 2470/42041 useless extension candidates. Maximal degree in co-relation 223724. Up to 67045 conditions per place. [2022-12-13 20:59:42,930 INFO L137 encePairwiseOnDemand]: 652/656 looper letters, 441 selfloop transitions, 26 changer transitions 0/478 dead transitions. [2022-12-13 20:59:42,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 478 transitions, 8046 flow [2022-12-13 20:59:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:59:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 20:59:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1016 transitions. [2022-12-13 20:59:42,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2022-12-13 20:59:42,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1016 transitions. [2022-12-13 20:59:42,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1016 transitions. [2022-12-13 20:59:42,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:59:42,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1016 transitions. [2022-12-13 20:59:42,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:42,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 656.0) internal successors, (3280), 5 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:42,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 656.0) internal successors, (3280), 5 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:42,939 INFO L175 Difference]: Start difference. First operand has 193 places, 480 transitions, 7124 flow. Second operand 4 states and 1016 transitions. [2022-12-13 20:59:42,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 478 transitions, 8046 flow [2022-12-13 20:59:45,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 478 transitions, 7699 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-13 20:59:45,360 INFO L231 Difference]: Finished difference. Result has 189 places, 478 transitions, 6817 flow [2022-12-13 20:59:45,360 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6817, PETRI_PLACES=189, PETRI_TRANSITIONS=478} [2022-12-13 20:59:45,361 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 128 predicate places. [2022-12-13 20:59:45,361 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 478 transitions, 6817 flow [2022-12-13 20:59:45,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:45,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:59:45,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:59:45,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 20:59:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:59:45,562 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 20:59:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:59:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1220954524, now seen corresponding path program 1 times [2022-12-13 20:59:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 20:59:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118289061] [2022-12-13 20:59:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:59:45,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 20:59:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 20:59:45,568 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 20:59:45,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 20:59:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:59:45,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 20:59:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:59:46,237 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 20:59:46,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 20:59:46,429 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 20:59:46,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 20:59:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:59:47,185 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 [2022-12-13 20:59:47,290 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 20:59:47,290 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 [2022-12-13 20:59:47,944 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:59:47,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-13 20:59:48,897 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:59:48,898 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 52 treesize of output 58 [2022-12-13 20:59:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:59:56,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:00:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:00:03,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:00:03,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118289061] [2022-12-13 21:00:03,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118289061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:00:03,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:00:03,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 21:00:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78037393] [2022-12-13 21:00:03,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:00:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 21:00:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:00:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 21:00:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-12-13 21:00:37,920 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 [0] [2022-12-13 21:01:11,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 656 [2022-12-13 21:01:11,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 478 transitions, 6817 flow. Second operand has 18 states, 18 states have (on average 227.33333333333334) internal successors, (4092), 18 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:01:11,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:01:11,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 656 [2022-12-13 21:01:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:01:43,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:01:48,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:01:49,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 21:02:05,567 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 85 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:02:14,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:02:16,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:02:18,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:02:21,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:02:41,611 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:02:52,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 21:03:08,343 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 [1] [2022-12-13 21:03:21,271 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:04:26,035 INFO L130 PetriNetUnfolder]: 49650/87897 cut-off events. [2022-12-13 21:04:26,035 INFO L131 PetriNetUnfolder]: For 77265/77265 co-relation queries the response was YES. [2022-12-13 21:04:26,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256844 conditions, 87897 events. 49650/87897 cut-off events. For 77265/77265 co-relation queries the response was YES. Maximal size of possible extension queue 2835. Compared 864868 event pairs, 33017 based on Foata normal form. 2/58591 useless extension candidates. Maximal degree in co-relation 256777. Up to 48051 conditions per place. [2022-12-13 21:04:26,775 INFO L137 encePairwiseOnDemand]: 641/656 looper letters, 464 selfloop transitions, 647 changer transitions 0/1113 dead transitions. [2022-12-13 21:04:26,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1113 transitions, 14782 flow [2022-12-13 21:04:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 21:04:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 21:04:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 9221 transitions. [2022-12-13 21:04:26,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36042057535959976 [2022-12-13 21:04:26,785 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 9221 transitions. [2022-12-13 21:04:26,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 9221 transitions. [2022-12-13 21:04:26,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:26,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 9221 transitions. [2022-12-13 21:04:26,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 236.43589743589743) internal successors, (9221), 39 states have internal predecessors, (9221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:26,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 656.0) internal successors, (26240), 40 states have internal predecessors, (26240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:26,809 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 656.0) internal successors, (26240), 40 states have internal predecessors, (26240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:26,809 INFO L175 Difference]: Start difference. First operand has 189 places, 478 transitions, 6817 flow. Second operand 39 states and 9221 transitions. [2022-12-13 21:04:26,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1113 transitions, 14782 flow [2022-12-13 21:04:31,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1113 transitions, 14669 flow, removed 40 selfloop flow, removed 3 redundant places. [2022-12-13 21:04:31,023 INFO L231 Difference]: Finished difference. Result has 232 places, 746 transitions, 12357 flow [2022-12-13 21:04:31,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=6764, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12357, PETRI_PLACES=232, PETRI_TRANSITIONS=746} [2022-12-13 21:04:31,023 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 171 predicate places. [2022-12-13 21:04:31,023 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 746 transitions, 12357 flow [2022-12-13 21:04:31,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 227.33333333333334) internal successors, (4092), 18 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:31,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:31,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:31,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 21:04:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:04:31,225 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 21:04:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1220954523, now seen corresponding path program 1 times [2022-12-13 21:04:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:04:31,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598375846] [2022-12-13 21:04:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:31,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:04:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:04:31,229 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:04:31,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 21:04:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 21:04:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:31,737 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 21:04:31,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 21:04:31,777 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 21:04:31,777 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 [2022-12-13 21:04:31,809 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:04:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-13 21:04:31,847 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 21:04:31,847 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 [2022-12-13 21:04:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 21:04:31,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:04:31,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:04:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598375846] [2022-12-13 21:04:31,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598375846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:04:31,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:04:31,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 21:04:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923399909] [2022-12-13 21:04:31,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:04:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:04:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:04:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:04:32,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 656 [2022-12-13 21:04:32,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 746 transitions, 12357 flow. Second operand has 6 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:32,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:32,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 656 [2022-12-13 21:04:32,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:50,857 INFO L130 PetriNetUnfolder]: 48124/81217 cut-off events. [2022-12-13 21:04:50,857 INFO L131 PetriNetUnfolder]: For 223081/232372 co-relation queries the response was YES. [2022-12-13 21:04:51,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272119 conditions, 81217 events. 48124/81217 cut-off events. For 223081/232372 co-relation queries the response was YES. Maximal size of possible extension queue 3117. Compared 786845 event pairs, 30571 based on Foata normal form. 6023/61233 useless extension candidates. Maximal degree in co-relation 272045. Up to 80026 conditions per place. [2022-12-13 21:04:51,703 INFO L137 encePairwiseOnDemand]: 652/656 looper letters, 710 selfloop transitions, 13 changer transitions 0/743 dead transitions. [2022-12-13 21:04:51,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 743 transitions, 13786 flow [2022-12-13 21:04:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 21:04:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 21:04:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1014 transitions. [2022-12-13 21:04:51,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3864329268292683 [2022-12-13 21:04:51,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1014 transitions. [2022-12-13 21:04:51,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1014 transitions. [2022-12-13 21:04:51,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:51,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1014 transitions. [2022-12-13 21:04:51,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 253.5) internal successors, (1014), 4 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:51,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 656.0) internal successors, (3280), 5 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:51,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 656.0) internal successors, (3280), 5 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:51,709 INFO L175 Difference]: Start difference. First operand has 232 places, 746 transitions, 12357 flow. Second operand 4 states and 1014 transitions. [2022-12-13 21:04:51,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 743 transitions, 13786 flow [2022-12-13 21:04:57,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 743 transitions, 13527 flow, removed 120 selfloop flow, removed 6 redundant places. [2022-12-13 21:04:57,844 INFO L231 Difference]: Finished difference. Result has 227 places, 743 transitions, 12107 flow [2022-12-13 21:04:57,845 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=656, PETRI_DIFFERENCE_MINUEND_FLOW=12081, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=12107, PETRI_PLACES=227, PETRI_TRANSITIONS=743} [2022-12-13 21:04:57,845 INFO L288 CegarLoopForPetriNet]: 61 programPoint places, 166 predicate places. [2022-12-13 21:04:57,845 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 743 transitions, 12107 flow [2022-12-13 21:04:57,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 244.83333333333334) internal successors, (1469), 6 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:57,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:57,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:57,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 21:04:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:04:58,047 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-13 21:04:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1220954586, now seen corresponding path program 1 times [2022-12-13 21:04:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 21:04:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418388713] [2022-12-13 21:04:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:58,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 21:04:58,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 21:04:58,050 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 21:04:58,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d618c2-95f3-409c-8df7-faeb3173a770/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 21:04:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 21:04:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:58,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-13 21:04:58,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 21:04:58,493 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 [2022-12-13 21:04:58,509 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 21:04:58,510 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 [2022-12-13 21:04:58,564 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 21:04:58,564 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 [2022-12-13 21:04:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:04:58,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:05:01,130 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_~B~0.base_93 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| v_~B~0.base_93))) (forall ((v_ArrVal_1183 (_ BitVec 32))) (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)) (select (store |c_#length| v_~B~0.base_93 v_ArrVal_1183) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))) (or (= |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv0 32)) (forall ((v_~B~0.base_93 (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| v_~B~0.base_93)))))) is different from false [2022-12-13 21:05:01,140 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 51 treesize of output 47 [2022-12-13 21:05:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-13 21:05:01,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 21:05:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418388713] [2022-12-13 21:05:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418388713] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:05:01,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:05:01,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-12-13 21:05:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533300040] [2022-12-13 21:05:01,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:05:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:05:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 21:05:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:05:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=83, Unknown=1, NotChecked=18, Total=132 [2022-12-13 21:05:02,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 656 [2022-12-13 21:05:02,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 743 transitions, 12107 flow. Second operand has 12 states, 12 states have (on average 191.83333333333334) internal successors, (2302), 12 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:05:02,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:05:02,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 656 [2022-12-13 21:05:02,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand