./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:02:05,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:02:05,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:02:05,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:02:05,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:02:05,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:02:05,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:02:05,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:02:05,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:02:05,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:02:05,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:02:05,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:02:05,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:02:05,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:02:05,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:02:05,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:02:05,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:02:05,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:02:05,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:02:05,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:02:05,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:02:05,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:02:05,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:02:05,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:02:05,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:02:05,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:02:05,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:02:05,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:02:05,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:02:05,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:02:05,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:02:05,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:02:05,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:02:05,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:02:05,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:02:05,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:02:05,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:02:05,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:02:05,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:02:05,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:02:05,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:02:05,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:02:05,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:02:05,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:02:05,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:02:05,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:02:05,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:02:05,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:02:05,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:02:05,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:02:05,422 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:02:05,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:02:05,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:02:05,422 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:02:05,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:02:05,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:02:05,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:02:05,423 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:02:05,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:02:05,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:02:05,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:02:05,424 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:02:05,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:02:05,424 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:02:05,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:02:05,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:02:05,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:02:05,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:02:05,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:02:05,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:02:05,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:02:05,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:02:05,426 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:02:05,426 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:02:05,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:02:05,426 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:02:05,426 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-12-13 15:02:05,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:02:05,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:02:05,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:02:05,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:02:05,610 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:02:05,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-12-13 15:02:08,220 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:02:08,357 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:02:08,357 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-12-13 15:02:08,362 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/cb6a6a476/3819a13acfb74f6d898c2473ec2aeae3/FLAGb221e4294 [2022-12-13 15:02:08,372 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/cb6a6a476/3819a13acfb74f6d898c2473ec2aeae3 [2022-12-13 15:02:08,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:02:08,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:02:08,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:02:08,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:02:08,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:02:08,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:02:08" (1/1) ... [2022-12-13 15:02:08,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d3d501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:08, skipping insertion in model container [2022-12-13 15:02:08,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:02:08" (1/1) ... [2022-12-13 15:02:08,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:02:08,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:02:08,518 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-12-13 15:02:08,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:02:08,537 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 15:02:08,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5adbd964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:08, skipping insertion in model container [2022-12-13 15:02:08,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:02:08,537 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 15:02:08,539 INFO L158 Benchmark]: Toolchain (without parser) took 163.10ms. Allocated memory is still 113.2MB. Free memory was 80.1MB in the beginning and 69.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:02:08,539 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:02:08,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.50ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 69.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:02:08,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.50ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 69.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:02:09,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:02:09,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:02:09,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:02:09,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:02:09,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:02:09,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:02:09,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:02:09,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:02:09,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:02:09,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:02:09,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:02:09,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:02:09,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:02:09,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:02:09,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:02:09,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:02:09,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:02:09,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:02:09,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:02:09,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:02:09,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:02:09,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:02:09,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:02:09,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:02:09,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:02:09,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:02:09,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:02:09,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:02:09,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:02:09,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:02:09,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:02:09,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:02:09,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:02:09,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:02:09,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:02:09,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:02:09,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:02:09,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:02:09,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:02:09,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:02:09,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 15:02:09,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:02:09,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:02:09,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:02:09,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:02:09,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:02:09,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:02:09,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:02:09,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:02:09,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:02:09,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:02:09,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:02:09,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 15:02:09,957 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:02:09,957 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-12-13 15:02:10,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:02:10,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:02:10,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:02:10,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:02:10,173 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:02:10,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-12-13 15:02:12,790 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:02:12,971 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:02:12,972 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-12-13 15:02:12,980 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/77e0142e3/94420d0d4e6a453eacb1e4b8f6ec22a2/FLAGdb375522b [2022-12-13 15:02:12,994 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/data/77e0142e3/94420d0d4e6a453eacb1e4b8f6ec22a2 [2022-12-13 15:02:12,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:02:12,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:02:12,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:02:12,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:02:13,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:02:13,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:02:12" (1/1) ... [2022-12-13 15:02:13,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb24df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13, skipping insertion in model container [2022-12-13 15:02:13,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:02:12" (1/1) ... [2022-12-13 15:02:13,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:02:13,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:02:13,182 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-12-13 15:02:13,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:02:13,203 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 15:02:13,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:02:13,219 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-12-13 15:02:13,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:02:13,228 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:02:13,246 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_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-12-13 15:02:13,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:02:13,262 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:02:13,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13 WrapperNode [2022-12-13 15:02:13,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:02:13,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:02:13,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:02:13,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:02:13,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,301 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 395 [2022-12-13 15:02:13,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:02:13,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:02:13,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:02:13,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:02:13,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:02:13,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:02:13,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:02:13,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:02:13,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (1/1) ... [2022-12-13 15:02:13,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:02:13,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:02:13,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:02:13,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 15:02:13,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 15:02:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 15:02:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 15:02:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:02:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:02:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 15:02:13,403 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 15:02:13,505 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:02:13,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:02:14,312 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:02:14,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:02:14,322 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 15:02:14,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:02:14 BoogieIcfgContainer [2022-12-13 15:02:14,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:02:14,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:02:14,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:02:14,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:02:14,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:02:12" (1/3) ... [2022-12-13 15:02:14,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1432e7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:02:14, skipping insertion in model container [2022-12-13 15:02:14,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:02:13" (2/3) ... [2022-12-13 15:02:14,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1432e7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:02:14, skipping insertion in model container [2022-12-13 15:02:14,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:02:14" (3/3) ... [2022-12-13 15:02:14,339 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2022-12-13 15:02:14,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:02:14,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2022-12-13 15:02:14,358 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:02:14,489 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 15:02:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 559 places, 590 transitions, 1204 flow [2022-12-13 15:02:14,684 INFO L130 PetriNetUnfolder]: 41/587 cut-off events. [2022-12-13 15:02:14,684 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 15:02:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 587 events. 41/587 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1034 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-12-13 15:02:14,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 559 places, 590 transitions, 1204 flow [2022-12-13 15:02:14,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 582 transitions, 1182 flow [2022-12-13 15:02:14,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:02:14,714 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 582 transitions, 1182 flow [2022-12-13 15:02:14,716 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 582 transitions, 1182 flow [2022-12-13 15:02:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 582 transitions, 1182 flow [2022-12-13 15:02:14,809 INFO L130 PetriNetUnfolder]: 41/582 cut-off events. [2022-12-13 15:02:14,809 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 15:02:14,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 582 events. 41/582 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1033 event pairs, 0 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-12-13 15:02:14,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 32370 [2022-12-13 15:03:27,324 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 197 DAG size of output: 196 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:03:36,521 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 215 DAG size of output: 212 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 15:03:37,607 INFO L134 LiptonReduction]: Checked pairs total: 53923 [2022-12-13 15:03:37,608 INFO L136 LiptonReduction]: Total number of compositions: 707 [2022-12-13 15:03:37,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:03:37,620 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;@64e4163d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:03:37,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2022-12-13 15:03:37,622 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 15:03:37,622 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:03:37,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:37,623 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:03:37,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:03:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 72773, now seen corresponding path program 1 times [2022-12-13 15:03:37,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:03:37,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127302478] [2022-12-13 15:03:37,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:37,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:03:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:03:37,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:37,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:03:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:37,929 INFO L321 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2022-12-13 15:03:37,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 46 [2022-12-13 15:03:37,975 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 15:03:37,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:03:37,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:03:37,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127302478] [2022-12-13 15:03:37,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127302478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:03:37,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:03:37,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:03:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396522999] [2022-12-13 15:03:37,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:03:37,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:03:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:03:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:03:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:03:38,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 536 out of 1297 [2022-12-13 15:03:38,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 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 15:03:38,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:38,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 536 of 1297 [2022-12-13 15:03:38,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:43,854 INFO L130 PetriNetUnfolder]: 28972/40299 cut-off events. [2022-12-13 15:03:43,854 INFO L131 PetriNetUnfolder]: For 499/499 co-relation queries the response was YES. [2022-12-13 15:03:43,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81108 conditions, 40299 events. 28972/40299 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 2366. Compared 249586 event pairs, 26445 based on Foata normal form. 0/12138 useless extension candidates. Maximal degree in co-relation 77578. Up to 40044 conditions per place. [2022-12-13 15:03:44,062 INFO L137 encePairwiseOnDemand]: 1288/1297 looper letters, 92 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2022-12-13 15:03:44,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 101 transitions, 410 flow [2022-12-13 15:03:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:03:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:03:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1709 transitions. [2022-12-13 15:03:44,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.439218709843228 [2022-12-13 15:03:44,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1709 transitions. [2022-12-13 15:03:44,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1709 transitions. [2022-12-13 15:03:44,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:44,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1709 transitions. [2022-12-13 15:03:44,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.6666666666666) internal successors, (1709), 3 states have internal predecessors, (1709), 0 states have call successors, (0), 0 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 15:03:44,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:03:44,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:03:44,101 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 224 flow. Second operand 3 states and 1709 transitions. [2022-12-13 15:03:44,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 101 transitions, 410 flow [2022-12-13 15:03:44,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 101 transitions, 398 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 15:03:44,173 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 221 flow [2022-12-13 15:03:44,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2022-12-13 15:03:44,178 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2022-12-13 15:03:44,178 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 221 flow [2022-12-13 15:03:44,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 536.6666666666666) internal successors, (1610), 3 states have internal predecessors, (1610), 0 states have call successors, (0), 0 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 15:03:44,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:44,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 15:03:44,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:44,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:44,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:03:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash 72772, now seen corresponding path program 1 times [2022-12-13 15:03:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:03:44,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384120715] [2022-12-13 15:03:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:44,383 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 15:03:44,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:03:44,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:03:44,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:44,620 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 15:03:44,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 15:03:44,638 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 15:03:44,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:03:44,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:03:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384120715] [2022-12-13 15:03:44,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384120715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:03:44,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:03:44,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 15:03:44,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514695439] [2022-12-13 15:03:44,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:03:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:03:44,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:03:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:03:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:03:44,918 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1297 [2022-12-13 15:03:44,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 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 15:03:44,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:44,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1297 [2022-12-13 15:03:44,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:49,401 INFO L130 PetriNetUnfolder]: 28972/40295 cut-off events. [2022-12-13 15:03:49,402 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 15:03:49,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80655 conditions, 40295 events. 28972/40295 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 2366. Compared 249540 event pairs, 26445 based on Foata normal form. 2/12140 useless extension candidates. Maximal degree in co-relation 80631. Up to 40041 conditions per place. [2022-12-13 15:03:49,564 INFO L137 encePairwiseOnDemand]: 1293/1297 looper letters, 90 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2022-12-13 15:03:49,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 397 flow [2022-12-13 15:03:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:03:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:03:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1709 transitions. [2022-12-13 15:03:49,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.439218709843228 [2022-12-13 15:03:49,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1709 transitions. [2022-12-13 15:03:49,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1709 transitions. [2022-12-13 15:03:49,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:49,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1709 transitions. [2022-12-13 15:03:49,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.6666666666666) internal successors, (1709), 3 states have internal predecessors, (1709), 0 states have call successors, (0), 0 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 15:03:49,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:03:49,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:03:49,579 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 221 flow. Second operand 3 states and 1709 transitions. [2022-12-13 15:03:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 397 flow [2022-12-13 15:03:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 15:03:49,582 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 212 flow [2022-12-13 15:03:49,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2022-12-13 15:03:49,583 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -10 predicate places. [2022-12-13 15:03:49,583 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 212 flow [2022-12-13 15:03:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 539.6666666666666) internal successors, (1619), 3 states have internal predecessors, (1619), 0 states have call successors, (0), 0 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 15:03:49,584 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:49,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 15:03:49,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:49,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:49,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:03:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:03:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2271324, now seen corresponding path program 1 times [2022-12-13 15:03:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:03:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584460478] [2022-12-13 15:03:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:03:49,788 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 15:03:49,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:03:49,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:49,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:03:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:03:49,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:03:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:03:49,982 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 15:03:49,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 15:03:50,033 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 15:03:50,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:03:50,214 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 15:03:50,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:03:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584460478] [2022-12-13 15:03:50,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584460478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:03:50,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:03:50,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 15:03:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566137759] [2022-12-13 15:03:50,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:03:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:03:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:03:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:03:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:03:52,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 521 out of 1297 [2022-12-13 15:03:52,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 522.0) internal successors, (3132), 6 states have internal predecessors, (3132), 0 states have call successors, (0), 0 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 15:03:52,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:03:52,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 521 of 1297 [2022-12-13 15:03:52,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:03:59,820 INFO L130 PetriNetUnfolder]: 28983/40227 cut-off events. [2022-12-13 15:03:59,820 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 15:03:59,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80613 conditions, 40227 events. 28983/40227 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 248043 event pairs, 26445 based on Foata normal form. 0/12105 useless extension candidates. Maximal degree in co-relation 80605. Up to 40036 conditions per place. [2022-12-13 15:03:59,968 INFO L137 encePairwiseOnDemand]: 1286/1297 looper letters, 87 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2022-12-13 15:03:59,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 119 transitions, 494 flow [2022-12-13 15:03:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:03:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:03:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 3250 transitions. [2022-12-13 15:03:59,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4176304291955795 [2022-12-13 15:03:59,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 3250 transitions. [2022-12-13 15:03:59,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 3250 transitions. [2022-12-13 15:03:59,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:03:59,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 3250 transitions. [2022-12-13 15:03:59,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 541.6666666666666) internal successors, (3250), 6 states have internal predecessors, (3250), 0 states have call successors, (0), 0 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 15:03:59,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1297.0) internal successors, (9079), 7 states have internal predecessors, (9079), 0 states have call successors, (0), 0 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 15:03:59,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1297.0) internal successors, (9079), 7 states have internal predecessors, (9079), 0 states have call successors, (0), 0 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 15:03:59,989 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 212 flow. Second operand 6 states and 3250 transitions. [2022-12-13 15:03:59,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 119 transitions, 494 flow [2022-12-13 15:03:59,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 119 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:03:59,991 INFO L231 Difference]: Finished difference. Result has 101 places, 119 transitions, 395 flow [2022-12-13 15:03:59,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=101, PETRI_TRANSITIONS=119} [2022-12-13 15:03:59,991 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2022-12-13 15:03:59,992 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 119 transitions, 395 flow [2022-12-13 15:03:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 522.0) internal successors, (3132), 6 states have internal predecessors, (3132), 0 states have call successors, (0), 0 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 15:03:59,993 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:03:59,993 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:04:00,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:00,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:00,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:04:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2105703792, now seen corresponding path program 1 times [2022-12-13 15:04:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:04:00,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831353303] [2022-12-13 15:04:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:00,198 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 15:04:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:04:00,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:00,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:04:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:00,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 15:04:00,377 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 15:04:00,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:04:00,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:04:00,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831353303] [2022-12-13 15:04:00,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831353303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:04:00,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:04:00,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:04:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160192239] [2022-12-13 15:04:00,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:04:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:04:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:04:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:04:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:04:01,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 534 out of 1297 [2022-12-13 15:04:01,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 119 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 535.25) internal successors, (2141), 4 states have internal predecessors, (2141), 0 states have call successors, (0), 0 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 15:04:01,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:01,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 534 of 1297 [2022-12-13 15:04:01,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:05,448 INFO L130 PetriNetUnfolder]: 28984/40230 cut-off events. [2022-12-13 15:04:05,448 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-12-13 15:04:05,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80689 conditions, 40230 events. 28984/40230 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 2269. Compared 247037 event pairs, 26445 based on Foata normal form. 0/12124 useless extension candidates. Maximal degree in co-relation 80676. Up to 40060 conditions per place. [2022-12-13 15:04:05,613 INFO L137 encePairwiseOnDemand]: 1292/1297 looper letters, 108 selfloop transitions, 8 changer transitions 0/122 dead transitions. [2022-12-13 15:04:05,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 122 transitions, 636 flow [2022-12-13 15:04:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:04:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:04:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2229 transitions. [2022-12-13 15:04:05,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42964533538936006 [2022-12-13 15:04:05,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2229 transitions. [2022-12-13 15:04:05,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2229 transitions. [2022-12-13 15:04:05,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:05,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2229 transitions. [2022-12-13 15:04:05,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 557.25) internal successors, (2229), 4 states have internal predecessors, (2229), 0 states have call successors, (0), 0 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 15:04:05,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:04:05,625 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:04:05,625 INFO L175 Difference]: Start difference. First operand has 101 places, 119 transitions, 395 flow. Second operand 4 states and 2229 transitions. [2022-12-13 15:04:05,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 122 transitions, 636 flow [2022-12-13 15:04:05,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 122 transitions, 624 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 15:04:05,628 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 419 flow [2022-12-13 15:04:05,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=419, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2022-12-13 15:04:05,628 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2022-12-13 15:04:05,628 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 419 flow [2022-12-13 15:04:05,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 535.25) internal successors, (2141), 4 states have internal predecessors, (2141), 0 states have call successors, (0), 0 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 15:04:05,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:05,629 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:04:05,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:05,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:05,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:04:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2105703793, now seen corresponding path program 1 times [2022-12-13 15:04:05,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:04:05,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837332509] [2022-12-13 15:04:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:05,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:04:05,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:04:05,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:05,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:04:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:05,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 15:04:05,941 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 15:04:05,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:04:05,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:04:05,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837332509] [2022-12-13 15:04:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837332509] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:04:05,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:04:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:04:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102955501] [2022-12-13 15:04:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:04:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:04:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:04:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:04:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:04:06,215 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 539 out of 1297 [2022-12-13 15:04:06,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 540.6666666666666) internal successors, (1622), 3 states have internal predecessors, (1622), 0 states have call successors, (0), 0 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 15:04:06,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:06,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 539 of 1297 [2022-12-13 15:04:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:10,435 INFO L130 PetriNetUnfolder]: 28984/40226 cut-off events. [2022-12-13 15:04:10,435 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-12-13 15:04:10,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80690 conditions, 40226 events. 28984/40226 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 2269. Compared 247016 event pairs, 26445 based on Foata normal form. 2/12127 useless extension candidates. Maximal degree in co-relation 80674. Up to 40033 conditions per place. [2022-12-13 15:04:10,614 INFO L137 encePairwiseOnDemand]: 1293/1297 looper letters, 107 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2022-12-13 15:04:10,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 118 transitions, 637 flow [2022-12-13 15:04:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:04:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:04:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1706 transitions. [2022-12-13 15:04:10,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4384476998200977 [2022-12-13 15:04:10,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1706 transitions. [2022-12-13 15:04:10,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1706 transitions. [2022-12-13 15:04:10,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:10,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1706 transitions. [2022-12-13 15:04:10,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 568.6666666666666) internal successors, (1706), 3 states have internal predecessors, (1706), 0 states have call successors, (0), 0 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 15:04:10,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:04:10,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:04:10,622 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 419 flow. Second operand 3 states and 1706 transitions. [2022-12-13 15:04:10,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 118 transitions, 637 flow [2022-12-13 15:04:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 118 transitions, 626 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 15:04:10,625 INFO L231 Difference]: Finished difference. Result has 102 places, 118 transitions, 412 flow [2022-12-13 15:04:10,625 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=102, PETRI_TRANSITIONS=118} [2022-12-13 15:04:10,625 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-12-13 15:04:10,625 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 118 transitions, 412 flow [2022-12-13 15:04:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 540.6666666666666) internal successors, (1622), 3 states have internal predecessors, (1622), 0 states have call successors, (0), 0 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 15:04:10,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:10,626 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 15:04:10,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Ended with exit code 0 [2022-12-13 15:04:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:10,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:04:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1039209979, now seen corresponding path program 2 times [2022-12-13 15:04:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:04:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538187516] [2022-12-13 15:04:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:04:10,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:04:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:04:10,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:10,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:10,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:04:10,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:04:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:04:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:11,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 15:04:11,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 15:04:11,156 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 15:04:11,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:04:11,711 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 15:04:11,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:04:11,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538187516] [2022-12-13 15:04:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538187516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:04:11,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:04:11,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 15:04:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628510275] [2022-12-13 15:04:11,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:04:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:04:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:04:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:04:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:04:22,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1297 [2022-12-13 15:04:22,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 118 transitions, 412 flow. Second operand has 12 states, 12 states have (on average 525.0) internal successors, (6300), 12 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 15:04:22,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:22,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1297 [2022-12-13 15:04:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:26,415 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 15:04:27,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:29,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:30,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:32,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:33,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:35,877 WARN L539 Checker$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 15:04:38,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:40,990 WARN L539 Checker$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 15:04:42,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:43,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:04:51,655 INFO L130 PetriNetUnfolder]: 29003/40267 cut-off events. [2022-12-13 15:04:51,655 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-12-13 15:04:51,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80847 conditions, 40267 events. 29003/40267 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 248087 event pairs, 26445 based on Foata normal form. 15/12180 useless extension candidates. Maximal degree in co-relation 80832. Up to 40037 conditions per place. [2022-12-13 15:04:51,816 INFO L137 encePairwiseOnDemand]: 1286/1297 looper letters, 90 selfloop transitions, 63 changer transitions 0/159 dead transitions. [2022-12-13 15:04:51,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 159 transitions, 963 flow [2022-12-13 15:04:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:04:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 15:04:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 8548 transitions. [2022-12-13 15:04:51,825 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4119121048573631 [2022-12-13 15:04:51,825 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 8548 transitions. [2022-12-13 15:04:51,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 8548 transitions. [2022-12-13 15:04:51,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:51,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 8548 transitions. [2022-12-13 15:04:51,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 534.25) internal successors, (8548), 16 states have internal predecessors, (8548), 0 states have call successors, (0), 0 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 15:04:51,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 1297.0) internal successors, (22049), 17 states have internal predecessors, (22049), 0 states have call successors, (0), 0 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 15:04:51,851 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 1297.0) internal successors, (22049), 17 states have internal predecessors, (22049), 0 states have call successors, (0), 0 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 15:04:51,851 INFO L175 Difference]: Start difference. First operand has 102 places, 118 transitions, 412 flow. Second operand 16 states and 8548 transitions. [2022-12-13 15:04:51,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 159 transitions, 963 flow [2022-12-13 15:04:51,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 952 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:04:51,854 INFO L231 Difference]: Finished difference. Result has 125 places, 154 transitions, 838 flow [2022-12-13 15:04:51,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=838, PETRI_PLACES=125, PETRI_TRANSITIONS=154} [2022-12-13 15:04:51,855 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 22 predicate places. [2022-12-13 15:04:51,855 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 154 transitions, 838 flow [2022-12-13 15:04:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 525.0) internal successors, (6300), 12 states have internal predecessors, (6300), 0 states have call successors, (0), 0 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 15:04:51,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:51,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:04:51,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Forceful destruction successful, exit code 0 [2022-12-13 15:04:52,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:52,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:04:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash -852290604, now seen corresponding path program 1 times [2022-12-13 15:04:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:04:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087084752] [2022-12-13 15:04:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:52,061 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 15:04:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:04:52,063 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:52,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:04:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:52,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:04:52,188 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 15:04:52,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:04:52,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:04:52,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087084752] [2022-12-13 15:04:52,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087084752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:04:52,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:04:52,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:04:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920876937] [2022-12-13 15:04:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:04:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:04:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:04:52,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:04:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:04:52,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 534 out of 1297 [2022-12-13 15:04:52,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 154 transitions, 838 flow. Second operand has 4 states, 4 states have (on average 535.5) internal successors, (2142), 4 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 15:04:52,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:52,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 534 of 1297 [2022-12-13 15:04:52,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:04:57,380 INFO L130 PetriNetUnfolder]: 29004/40269 cut-off events. [2022-12-13 15:04:57,380 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2022-12-13 15:04:57,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80984 conditions, 40269 events. 29004/40269 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 248147 event pairs, 26445 based on Foata normal form. 0/12166 useless extension candidates. Maximal degree in co-relation 80959. Up to 40088 conditions per place. [2022-12-13 15:04:57,606 INFO L137 encePairwiseOnDemand]: 1292/1297 looper letters, 133 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2022-12-13 15:04:57,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1142 flow [2022-12-13 15:04:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:04:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:04:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2225 transitions. [2022-12-13 15:04:57,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42887432536622977 [2022-12-13 15:04:57,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2225 transitions. [2022-12-13 15:04:57,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2225 transitions. [2022-12-13 15:04:57,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:04:57,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2225 transitions. [2022-12-13 15:04:57,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 556.25) internal successors, (2225), 4 states have internal predecessors, (2225), 0 states have call successors, (0), 0 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 15:04:57,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:04:57,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:04:57,616 INFO L175 Difference]: Start difference. First operand has 125 places, 154 transitions, 838 flow. Second operand 4 states and 2225 transitions. [2022-12-13 15:04:57,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1142 flow [2022-12-13 15:04:57,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 156 transitions, 1012 flow, removed 33 selfloop flow, removed 4 redundant places. [2022-12-13 15:04:57,620 INFO L231 Difference]: Finished difference. Result has 125 places, 156 transitions, 758 flow [2022-12-13 15:04:57,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=758, PETRI_PLACES=125, PETRI_TRANSITIONS=156} [2022-12-13 15:04:57,621 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 22 predicate places. [2022-12-13 15:04:57,621 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 156 transitions, 758 flow [2022-12-13 15:04:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 535.5) internal successors, (2142), 4 states have internal predecessors, (2142), 0 states have call successors, (0), 0 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 15:04:57,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:04:57,621 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:04:57,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:57,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:57,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:04:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:04:57,823 INFO L85 PathProgramCache]: Analyzing trace with hash -852295236, now seen corresponding path program 1 times [2022-12-13 15:04:57,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:04:57,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889120584] [2022-12-13 15:04:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:04:57,823 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 15:04:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:04:57,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:57,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:04:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:04:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:04:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:04:57,965 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 15:04:57,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:04:57,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:04:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889120584] [2022-12-13 15:04:57,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889120584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:04:57,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:04:57,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:04:57,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202322377] [2022-12-13 15:04:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:04:57,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:04:57,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:04:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:04:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:04:58,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 540 out of 1297 [2022-12-13 15:04:58,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 156 transitions, 758 flow. Second operand has 3 states, 3 states have (on average 542.0) internal successors, (1626), 3 states have internal predecessors, (1626), 0 states have call successors, (0), 0 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 15:04:58,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:04:58,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 540 of 1297 [2022-12-13 15:04:58,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:02,923 INFO L130 PetriNetUnfolder]: 29003/40268 cut-off events. [2022-12-13 15:05:02,923 INFO L131 PetriNetUnfolder]: For 296/296 co-relation queries the response was YES. [2022-12-13 15:05:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80932 conditions, 40268 events. 29003/40268 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 248187 event pairs, 26445 based on Foata normal form. 1/12166 useless extension candidates. Maximal degree in co-relation 80906. Up to 40104 conditions per place. [2022-12-13 15:05:03,170 INFO L137 encePairwiseOnDemand]: 1294/1297 looper letters, 147 selfloop transitions, 2 changer transitions 0/155 dead transitions. [2022-12-13 15:05:03,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 1050 flow [2022-12-13 15:05:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:05:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:05:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1708 transitions. [2022-12-13 15:05:03,173 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4389617065021845 [2022-12-13 15:05:03,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1708 transitions. [2022-12-13 15:05:03,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1708 transitions. [2022-12-13 15:05:03,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:03,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1708 transitions. [2022-12-13 15:05:03,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.3333333333334) internal successors, (1708), 3 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 15:05:03,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:05:03,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1297.0) internal successors, (5188), 4 states have internal predecessors, (5188), 0 states have call successors, (0), 0 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 15:05:03,179 INFO L175 Difference]: Start difference. First operand has 125 places, 156 transitions, 758 flow. Second operand 3 states and 1708 transitions. [2022-12-13 15:05:03,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 1050 flow [2022-12-13 15:05:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 155 transitions, 1022 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 15:05:03,183 INFO L231 Difference]: Finished difference. Result has 125 places, 155 transitions, 728 flow [2022-12-13 15:05:03,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=728, PETRI_PLACES=125, PETRI_TRANSITIONS=155} [2022-12-13 15:05:03,183 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 22 predicate places. [2022-12-13 15:05:03,183 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 155 transitions, 728 flow [2022-12-13 15:05:03,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 542.0) internal successors, (1626), 3 states have internal predecessors, (1626), 0 states have call successors, (0), 0 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 15:05:03,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:03,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:03,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:03,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:03,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:05:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1963808173, now seen corresponding path program 1 times [2022-12-13 15:05:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:05:03,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586136872] [2022-12-13 15:05:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:03,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:05:03,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:05:03,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:03,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:05:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:03,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:05:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:05:03,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:05:03,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:05:03,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586136872] [2022-12-13 15:05:03,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586136872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:03,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:05:03,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 15:05:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561294151] [2022-12-13 15:05:03,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:03,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:05:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:05:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:05:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:05:06,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 519 out of 1297 [2022-12-13 15:05:06,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 155 transitions, 728 flow. Second operand has 7 states, 7 states have (on average 521.0) internal successors, (3647), 7 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 15:05:06,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:06,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 519 of 1297 [2022-12-13 15:05:06,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:08,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:05:09,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:05:15,381 INFO L130 PetriNetUnfolder]: 29016/40290 cut-off events. [2022-12-13 15:05:15,381 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-12-13 15:05:15,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81009 conditions, 40290 events. 29016/40290 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 247082 event pairs, 26445 based on Foata normal form. 0/12181 useless extension candidates. Maximal degree in co-relation 80982. Up to 40039 conditions per place. [2022-12-13 15:05:15,613 INFO L137 encePairwiseOnDemand]: 1284/1297 looper letters, 132 selfloop transitions, 36 changer transitions 0/174 dead transitions. [2022-12-13 15:05:15,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1166 flow [2022-12-13 15:05:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:05:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:05:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3745 transitions. [2022-12-13 15:05:15,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4124903623747109 [2022-12-13 15:05:15,619 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3745 transitions. [2022-12-13 15:05:15,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3745 transitions. [2022-12-13 15:05:15,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:15,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3745 transitions. [2022-12-13 15:05:15,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 535.0) internal successors, (3745), 7 states have internal predecessors, (3745), 0 states have call successors, (0), 0 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 15:05:15,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1297.0) internal successors, (10376), 8 states have internal predecessors, (10376), 0 states have call successors, (0), 0 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 15:05:15,628 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1297.0) internal successors, (10376), 8 states have internal predecessors, (10376), 0 states have call successors, (0), 0 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 15:05:15,628 INFO L175 Difference]: Start difference. First operand has 125 places, 155 transitions, 728 flow. Second operand 7 states and 3745 transitions. [2022-12-13 15:05:15,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1166 flow [2022-12-13 15:05:15,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 174 transitions, 1162 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:05:15,632 INFO L231 Difference]: Finished difference. Result has 132 places, 174 transitions, 962 flow [2022-12-13 15:05:15,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=962, PETRI_PLACES=132, PETRI_TRANSITIONS=174} [2022-12-13 15:05:15,633 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 29 predicate places. [2022-12-13 15:05:15,633 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 174 transitions, 962 flow [2022-12-13 15:05:15,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 521.0) internal successors, (3647), 7 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 15:05:15,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:15,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:15,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Forceful destruction successful, exit code 0 [2022-12-13 15:05:15,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:15,835 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:05:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash -748352442, now seen corresponding path program 1 times [2022-12-13 15:05:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:05:15,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121214275] [2022-12-13 15:05:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:15,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:05:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:05:15,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:15,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:05:15,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:16,031 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 15:05:16,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:16,139 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 15:05:16,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:05:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121214275] [2022-12-13 15:05:16,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121214275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:16,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:05:16,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 15:05:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480683623] [2022-12-13 15:05:16,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:16,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:05:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:05:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:05:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:05:17,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1297 [2022-12-13 15:05:17,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 962 flow. Second operand has 10 states, 10 states have (on average 517.4) internal successors, (5174), 10 states have internal predecessors, (5174), 0 states have call successors, (0), 0 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 15:05:17,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:17,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1297 [2022-12-13 15:05:17,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:28,154 INFO L130 PetriNetUnfolder]: 58017/80553 cut-off events. [2022-12-13 15:05:28,154 INFO L131 PetriNetUnfolder]: For 606/606 co-relation queries the response was YES. [2022-12-13 15:05:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162010 conditions, 80553 events. 58017/80553 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 4222. Compared 539754 event pairs, 52890 based on Foata normal form. 4/24355 useless extension candidates. Maximal degree in co-relation 161980. Up to 40106 conditions per place. [2022-12-13 15:05:28,674 INFO L137 encePairwiseOnDemand]: 1288/1297 looper letters, 275 selfloop transitions, 34 changer transitions 0/315 dead transitions. [2022-12-13 15:05:28,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 315 transitions, 2309 flow [2022-12-13 15:05:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:05:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:05:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4819 transitions. [2022-12-13 15:05:28,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4128330334961021 [2022-12-13 15:05:28,680 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4819 transitions. [2022-12-13 15:05:28,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4819 transitions. [2022-12-13 15:05:28,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:28,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4819 transitions. [2022-12-13 15:05:28,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 535.4444444444445) internal successors, (4819), 9 states have internal predecessors, (4819), 0 states have call successors, (0), 0 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 15:05:28,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:05:28,692 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:05:28,692 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 962 flow. Second operand 9 states and 4819 transitions. [2022-12-13 15:05:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 315 transitions, 2309 flow [2022-12-13 15:05:28,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 315 transitions, 2236 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-12-13 15:05:28,701 INFO L231 Difference]: Finished difference. Result has 138 places, 187 transitions, 1113 flow [2022-12-13 15:05:28,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1113, PETRI_PLACES=138, PETRI_TRANSITIONS=187} [2022-12-13 15:05:28,702 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 35 predicate places. [2022-12-13 15:05:28,702 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 187 transitions, 1113 flow [2022-12-13 15:05:28,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 517.4) internal successors, (5174), 10 states have internal predecessors, (5174), 0 states have call successors, (0), 0 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 15:05:28,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:28,703 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:28,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:28,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:28,905 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:05:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1728453378, now seen corresponding path program 1 times [2022-12-13 15:05:28,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:05:28,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447530368] [2022-12-13 15:05:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:28,908 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 15:05:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:05:28,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:28,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:05:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:05:29,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:05:29,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:05:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447530368] [2022-12-13 15:05:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447530368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:05:29,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:05:29,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:05:29,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623077380] [2022-12-13 15:05:29,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:05:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:05:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:05:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:05:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:05:29,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 540 out of 1297 [2022-12-13 15:05:29,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 187 transitions, 1113 flow. Second operand has 4 states, 4 states have (on average 542.25) internal successors, (2169), 4 states have internal predecessors, (2169), 0 states have call successors, (0), 0 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 15:05:29,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:29,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 540 of 1297 [2022-12-13 15:05:29,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:05:39,203 INFO L130 PetriNetUnfolder]: 58015/80551 cut-off events. [2022-12-13 15:05:39,203 INFO L131 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2022-12-13 15:05:39,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161980 conditions, 80551 events. 58015/80551 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 4281. Compared 539015 event pairs, 52890 based on Foata normal form. 2/24353 useless extension candidates. Maximal degree in co-relation 161949. Up to 80202 conditions per place. [2022-12-13 15:05:39,760 INFO L137 encePairwiseOnDemand]: 1292/1297 looper letters, 166 selfloop transitions, 13 changer transitions 0/185 dead transitions. [2022-12-13 15:05:39,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 185 transitions, 1445 flow [2022-12-13 15:05:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:05:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:05:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2249 transitions. [2022-12-13 15:05:39,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335003855050116 [2022-12-13 15:05:39,764 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2249 transitions. [2022-12-13 15:05:39,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2249 transitions. [2022-12-13 15:05:39,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:05:39,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2249 transitions. [2022-12-13 15:05:39,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 562.25) internal successors, (2249), 4 states have internal predecessors, (2249), 0 states have call successors, (0), 0 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 15:05:39,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:05:39,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:05:39,770 INFO L175 Difference]: Start difference. First operand has 138 places, 187 transitions, 1113 flow. Second operand 4 states and 2249 transitions. [2022-12-13 15:05:39,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 185 transitions, 1445 flow [2022-12-13 15:05:39,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 185 transitions, 1440 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 15:05:39,775 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1108 flow [2022-12-13 15:05:39,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1108, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2022-12-13 15:05:39,776 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 36 predicate places. [2022-12-13 15:05:39,776 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1108 flow [2022-12-13 15:05:39,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 542.25) internal successors, (2169), 4 states have internal predecessors, (2169), 0 states have call successors, (0), 0 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 15:05:39,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:05:39,776 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:05:39,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Forceful destruction successful, exit code 0 [2022-12-13 15:05:39,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:39,977 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:05:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:05:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2102551395, now seen corresponding path program 1 times [2022-12-13 15:05:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:05:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717451771] [2022-12-13 15:05:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:05:39,980 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 15:05:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:05:39,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:39,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:05:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:05:40,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:05:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:05:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:05:40,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:05:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:05:40,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:05:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717451771] [2022-12-13 15:05:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717451771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:05:40,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:05:40,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-12-13 15:05:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778766823] [2022-12-13 15:05:40,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:05:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:05:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:05:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:05:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:05:42,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1297 [2022-12-13 15:05:42,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1108 flow. Second operand has 11 states, 11 states have (on average 517.8181818181819) internal successors, (5696), 11 states have internal predecessors, (5696), 0 states have call successors, (0), 0 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 15:05:42,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:05:42,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1297 [2022-12-13 15:05:42,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:02,202 INFO L130 PetriNetUnfolder]: 115959/160957 cut-off events. [2022-12-13 15:06:02,203 INFO L131 PetriNetUnfolder]: For 895/895 co-relation queries the response was YES. [2022-12-13 15:06:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323238 conditions, 160957 events. 115959/160957 cut-off events. For 895/895 co-relation queries the response was YES. Maximal size of possible extension queue 7711. Compared 1156880 event pairs, 105780 based on Foata normal form. 4/48569 useless extension candidates. Maximal degree in co-relation 323207. Up to 80179 conditions per place. [2022-12-13 15:06:03,465 INFO L137 encePairwiseOnDemand]: 1285/1297 looper letters, 237 selfloop transitions, 35 changer transitions 0/278 dead transitions. [2022-12-13 15:06:03,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 278 transitions, 1998 flow [2022-12-13 15:06:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:06:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:06:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4817 transitions. [2022-12-13 15:06:03,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41266169793540647 [2022-12-13 15:06:03,471 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4817 transitions. [2022-12-13 15:06:03,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4817 transitions. [2022-12-13 15:06:03,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:03,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4817 transitions. [2022-12-13 15:06:03,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 535.2222222222222) internal successors, (4817), 9 states have internal predecessors, (4817), 0 states have call successors, (0), 0 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 15:06:03,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:06:03,486 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:06:03,486 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1108 flow. Second operand 9 states and 4817 transitions. [2022-12-13 15:06:03,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 278 transitions, 1998 flow [2022-12-13 15:06:03,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 278 transitions, 1985 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:06:03,492 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 1232 flow [2022-12-13 15:06:03,492 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1232, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2022-12-13 15:06:03,493 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 42 predicate places. [2022-12-13 15:06:03,493 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 1232 flow [2022-12-13 15:06:03,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 517.8181818181819) internal successors, (5696), 11 states have internal predecessors, (5696), 0 states have call successors, (0), 0 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 15:06:03,494 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:03,494 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:06:03,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Forceful destruction successful, exit code 0 [2022-12-13 15:06:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:03,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:06:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -754582324, now seen corresponding path program 1 times [2022-12-13 15:06:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:06:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812657672] [2022-12-13 15:06:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:03,698 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 15:06:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:06:03,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 15:06:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:06:03,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:06:03,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:06:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812657672] [2022-12-13 15:06:03,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812657672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:06:03,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:06:03,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:06:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169227560] [2022-12-13 15:06:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:06:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:06:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:06:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:06:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:06:04,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 540 out of 1297 [2022-12-13 15:06:04,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 1232 flow. Second operand has 4 states, 4 states have (on average 542.75) internal successors, (2171), 4 states have internal predecessors, (2171), 0 states have call successors, (0), 0 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 15:06:04,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:04,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 540 of 1297 [2022-12-13 15:06:04,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:23,765 INFO L130 PetriNetUnfolder]: 115957/160955 cut-off events. [2022-12-13 15:06:23,766 INFO L131 PetriNetUnfolder]: For 947/947 co-relation queries the response was YES. [2022-12-13 15:06:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323282 conditions, 160955 events. 115957/160955 cut-off events. For 947/947 co-relation queries the response was YES. Maximal size of possible extension queue 7710. Compared 1157860 event pairs, 105780 based on Foata normal form. 2/48565 useless extension candidates. Maximal degree in co-relation 323250. Up to 160288 conditions per place. [2022-12-13 15:06:25,034 INFO L137 encePairwiseOnDemand]: 1292/1297 looper letters, 172 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2022-12-13 15:06:25,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 1595 flow [2022-12-13 15:06:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:06:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:06:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2249 transitions. [2022-12-13 15:06:25,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4335003855050116 [2022-12-13 15:06:25,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2249 transitions. [2022-12-13 15:06:25,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2249 transitions. [2022-12-13 15:06:25,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:06:25,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2249 transitions. [2022-12-13 15:06:25,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 562.25) internal successors, (2249), 4 states have internal predecessors, (2249), 0 states have call successors, (0), 0 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 15:06:25,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:06:25,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1297.0) internal successors, (6485), 5 states have internal predecessors, (6485), 0 states have call successors, (0), 0 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 15:06:25,046 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 1232 flow. Second operand 4 states and 2249 transitions. [2022-12-13 15:06:25,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 1595 flow [2022-12-13 15:06:25,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 191 transitions, 1576 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 15:06:25,056 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 1232 flow [2022-12-13 15:06:25,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1232, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2022-12-13 15:06:25,057 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 43 predicate places. [2022-12-13 15:06:25,057 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 1232 flow [2022-12-13 15:06:25,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 542.75) internal successors, (2171), 4 states have internal predecessors, (2171), 0 states have call successors, (0), 0 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 15:06:25,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:06:25,058 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1] [2022-12-13 15:06:25,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:25,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:25,259 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:06:25,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:06:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1744208892, now seen corresponding path program 1 times [2022-12-13 15:06:25,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:06:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293801138] [2022-12-13 15:06:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:06:25,263 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 15:06:25,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:06:25,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:25,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:06:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:06:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:06:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:06:25,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 15:06:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:06:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:06:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:06:27,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:06:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293801138] [2022-12-13 15:06:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293801138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:06:27,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:06:27,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 15:06:27,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203221667] [2022-12-13 15:06:27,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:06:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:06:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:06:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:06:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:06:53,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1297 [2022-12-13 15:06:53,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 1232 flow. Second operand has 18 states, 18 states have (on average 525.1111111111111) internal successors, (9452), 18 states have internal predecessors, (9452), 0 states have call successors, (0), 0 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 15:06:53,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:06:53,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1297 [2022-12-13 15:06:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:06:56,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:06:58,813 WARN L539 Checker$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 15:07:00,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:02,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:04,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:06,853 WARN L539 Checker$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 15:07:08,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:14,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:16,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:17,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:19,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:07:21,603 WARN L539 Checker$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 15:07:23,606 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 15:07:48,414 INFO L130 PetriNetUnfolder]: 115981/161003 cut-off events. [2022-12-13 15:07:48,414 INFO L131 PetriNetUnfolder]: For 1575/1575 co-relation queries the response was YES. [2022-12-13 15:07:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323469 conditions, 161003 events. 115981/161003 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 7710. Compared 1158136 event pairs, 105780 based on Foata normal form. 20/48631 useless extension candidates. Maximal degree in co-relation 323437. Up to 160176 conditions per place. [2022-12-13 15:07:49,622 INFO L137 encePairwiseOnDemand]: 1287/1297 looper letters, 118 selfloop transitions, 96 changer transitions 0/220 dead transitions. [2022-12-13 15:07:49,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 220 transitions, 1886 flow [2022-12-13 15:07:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:07:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 15:07:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 9602 transitions. [2022-12-13 15:07:49,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41129101344984154 [2022-12-13 15:07:49,639 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 9602 transitions. [2022-12-13 15:07:49,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 9602 transitions. [2022-12-13 15:07:49,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:07:49,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 9602 transitions. [2022-12-13 15:07:49,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 533.4444444444445) internal successors, (9602), 18 states have internal predecessors, (9602), 0 states have call successors, (0), 0 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 15:07:49,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 1297.0) internal successors, (24643), 19 states have internal predecessors, (24643), 0 states have call successors, (0), 0 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 15:07:49,669 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 1297.0) internal successors, (24643), 19 states have internal predecessors, (24643), 0 states have call successors, (0), 0 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 15:07:49,669 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 1232 flow. Second operand 18 states and 9602 transitions. [2022-12-13 15:07:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 220 transitions, 1886 flow [2022-12-13 15:07:49,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 220 transitions, 1855 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:07:49,676 INFO L231 Difference]: Finished difference. Result has 171 places, 212 transitions, 1688 flow [2022-12-13 15:07:49,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1688, PETRI_PLACES=171, PETRI_TRANSITIONS=212} [2022-12-13 15:07:49,677 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 68 predicate places. [2022-12-13 15:07:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 212 transitions, 1688 flow [2022-12-13 15:07:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 525.1111111111111) internal successors, (9452), 18 states have internal predecessors, (9452), 0 states have call successors, (0), 0 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 15:07:49,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:07:49,678 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:07:49,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Ended with exit code 0 [2022-12-13 15:07:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:07:49,879 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:07:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:07:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1541221357, now seen corresponding path program 1 times [2022-12-13 15:07:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:07:49,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845149928] [2022-12-13 15:07:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:07:49,882 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 15:07:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:07:49,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:07:49,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:07:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:07:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:07:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:07:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:07:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:07:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:07:50,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:07:50,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845149928] [2022-12-13 15:07:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845149928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:07:50,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:07:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-13 15:07:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37802185] [2022-12-13 15:07:50,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:07:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:07:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:07:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:07:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:07:52,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 516 out of 1297 [2022-12-13 15:07:52,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 212 transitions, 1688 flow. Second operand has 12 states, 12 states have (on average 517.8333333333334) internal successors, (6214), 12 states have internal predecessors, (6214), 0 states have call successors, (0), 0 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 15:07:52,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:07:52,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 516 of 1297 [2022-12-13 15:07:52,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:08:38,543 INFO L130 PetriNetUnfolder]: 231911/321907 cut-off events. [2022-12-13 15:08:38,543 INFO L131 PetriNetUnfolder]: For 2726/2726 co-relation queries the response was YES. [2022-12-13 15:08:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646854 conditions, 321907 events. 231911/321907 cut-off events. For 2726/2726 co-relation queries the response was YES. Maximal size of possible extension queue 15320. Compared 2499397 event pairs, 211560 based on Foata normal form. 8/97131 useless extension candidates. Maximal degree in co-relation 646812. Up to 160281 conditions per place. [2022-12-13 15:08:41,707 INFO L137 encePairwiseOnDemand]: 1287/1297 looper letters, 287 selfloop transitions, 64 changer transitions 0/357 dead transitions. [2022-12-13 15:08:41,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 357 transitions, 3477 flow [2022-12-13 15:08:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:08:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 15:08:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4816 transitions. [2022-12-13 15:08:41,714 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41257603015505867 [2022-12-13 15:08:41,714 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4816 transitions. [2022-12-13 15:08:41,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4816 transitions. [2022-12-13 15:08:41,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:08:41,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4816 transitions. [2022-12-13 15:08:41,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 535.1111111111111) internal successors, (4816), 9 states have internal predecessors, (4816), 0 states have call successors, (0), 0 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 15:08:41,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:08:41,725 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1297.0) internal successors, (12970), 10 states have internal predecessors, (12970), 0 states have call successors, (0), 0 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 15:08:41,725 INFO L175 Difference]: Start difference. First operand has 171 places, 212 transitions, 1688 flow. Second operand 9 states and 4816 transitions. [2022-12-13 15:08:41,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 357 transitions, 3477 flow [2022-12-13 15:08:41,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 357 transitions, 3344 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-13 15:08:41,740 INFO L231 Difference]: Finished difference. Result has 173 places, 235 transitions, 2039 flow [2022-12-13 15:08:41,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=173, PETRI_TRANSITIONS=235} [2022-12-13 15:08:41,741 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 70 predicate places. [2022-12-13 15:08:41,741 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 235 transitions, 2039 flow [2022-12-13 15:08:41,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 517.8333333333334) internal successors, (6214), 12 states have internal predecessors, (6214), 0 states have call successors, (0), 0 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 15:08:41,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:08:41,741 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 15:08:41,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:08:41,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:08:41,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:08:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:08:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -932152667, now seen corresponding path program 3 times [2022-12-13 15:08:41,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:08:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316732746] [2022-12-13 15:08:41,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:08:41,946 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 15:08:41,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:08:41,949 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:08:41,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:08:42,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:08:42,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:08:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:08:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:08:42,241 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 15:08:42,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 15:08:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:42,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:08:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:08:44,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:08:44,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316732746] [2022-12-13 15:08:44,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316732746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:08:44,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:08:44,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 15:08:44,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235013965] [2022-12-13 15:08:44,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:08:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:08:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:08:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:08:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:09:30,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 524 out of 1297 [2022-12-13 15:09:30,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 235 transitions, 2039 flow. Second operand has 24 states, 24 states have (on average 525.0) internal successors, (12600), 24 states have internal predecessors, (12600), 0 states have call successors, (0), 0 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 15:09:30,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:09:30,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 524 of 1297 [2022-12-13 15:09:30,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:09:42,967 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 15:09:44,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:09:46,973 WARN L539 Checker$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 15:09:48,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:09:50,978 WARN L539 Checker$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 15:09:52,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:09:54,983 WARN L539 Checker$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 15:09:56,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:09:58,187 WARN L539 Checker$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 15:10:00,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:10:06,737 WARN L539 Checker$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 15:10:08,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:10:10,742 WARN L539 Checker$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 15:10:12,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:10:14,747 WARN L539 Checker$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 15:10:16,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:10:18,752 WARN L539 Checker$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 15:10:20,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:10:22,758 WARN L539 Checker$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 15:10:24,367 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 15:11:12,953 INFO L130 PetriNetUnfolder]: 231947/321987 cut-off events. [2022-12-13 15:11:12,953 INFO L131 PetriNetUnfolder]: For 4746/4746 co-relation queries the response was YES. [2022-12-13 15:11:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647383 conditions, 321987 events. 231947/321987 cut-off events. For 4746/4746 co-relation queries the response was YES. Maximal size of possible extension queue 15320. Compared 2500346 event pairs, 211560 based on Foata normal form. 20/97223 useless extension candidates. Maximal degree in co-relation 647340. Up to 320354 conditions per place. [2022-12-13 15:11:16,315 INFO L137 encePairwiseOnDemand]: 1287/1297 looper letters, 133 selfloop transitions, 144 changer transitions 0/283 dead transitions. [2022-12-13 15:11:16,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 283 transitions, 3148 flow [2022-12-13 15:11:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:11:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 15:11:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 12774 transitions. [2022-12-13 15:11:16,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41037008481110254 [2022-12-13 15:11:16,327 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 12774 transitions. [2022-12-13 15:11:16,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 12774 transitions. [2022-12-13 15:11:16,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:11:16,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 12774 transitions. [2022-12-13 15:11:16,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 532.25) internal successors, (12774), 24 states have internal predecessors, (12774), 0 states have call successors, (0), 0 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 15:11:16,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 1297.0) internal successors, (32425), 25 states have internal predecessors, (32425), 0 states have call successors, (0), 0 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 15:11:16,356 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 1297.0) internal successors, (32425), 25 states have internal predecessors, (32425), 0 states have call successors, (0), 0 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 15:11:16,356 INFO L175 Difference]: Start difference. First operand has 173 places, 235 transitions, 2039 flow. Second operand 24 states and 12774 transitions. [2022-12-13 15:11:16,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 283 transitions, 3148 flow [2022-12-13 15:11:16,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 283 transitions, 3108 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 15:11:16,372 INFO L231 Difference]: Finished difference. Result has 205 places, 273 transitions, 2895 flow [2022-12-13 15:11:16,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2895, PETRI_PLACES=205, PETRI_TRANSITIONS=273} [2022-12-13 15:11:16,373 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 102 predicate places. [2022-12-13 15:11:16,373 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 273 transitions, 2895 flow [2022-12-13 15:11:16,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 525.0) internal successors, (12600), 24 states have internal predecessors, (12600), 0 states have call successors, (0), 0 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 15:11:16,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:11:16,374 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:11:16,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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)] Forceful destruction successful, exit code 0 [2022-12-13 15:11:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:11:16,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:11:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:11:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1545732831, now seen corresponding path program 1 times [2022-12-13 15:11:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:11:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389922123] [2022-12-13 15:11:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:11:16,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 15:11:16,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:11:16,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:11:16,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:11:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:11:16,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:11:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:11:16,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 15:11:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:11:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:11:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:11:17,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:11:17,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389922123] [2022-12-13 15:11:17,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389922123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:11:17,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:11:17,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 15:11:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385526077] [2022-12-13 15:11:17,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:11:17,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 15:11:17,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:11:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 15:11:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:11:34,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 507 out of 1297 [2022-12-13 15:11:35,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 273 transitions, 2895 flow. Second operand has 17 states, 17 states have (on average 508.4117647058824) internal successors, (8643), 17 states have internal predecessors, (8643), 0 states have call successors, (0), 0 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 15:11:35,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:11:35,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 507 of 1297 [2022-12-13 15:11:35,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:12:49,505 INFO L130 PetriNetUnfolder]: 347879/482897 cut-off events. [2022-12-13 15:12:49,505 INFO L131 PetriNetUnfolder]: For 6833/6833 co-relation queries the response was YES. [2022-12-13 15:12:54,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971076 conditions, 482897 events. 347879/482897 cut-off events. For 6833/6833 co-relation queries the response was YES. Maximal size of possible extension queue 19787. Compared 3837498 event pairs, 317340 based on Foata normal form. 20/145741 useless extension candidates. Maximal degree in co-relation 971021. Up to 160351 conditions per place. [2022-12-13 15:12:56,032 INFO L137 encePairwiseOnDemand]: 1287/1297 looper letters, 523 selfloop transitions, 83 changer transitions 0/612 dead transitions. [2022-12-13 15:12:56,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 612 transitions, 7054 flow [2022-12-13 15:12:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:12:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 15:12:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 7872 transitions. [2022-12-13 15:12:56,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40462606013878183 [2022-12-13 15:12:56,040 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 7872 transitions. [2022-12-13 15:12:56,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 7872 transitions. [2022-12-13 15:12:56,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:12:56,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 7872 transitions. [2022-12-13 15:12:56,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 524.8) internal successors, (7872), 15 states have internal predecessors, (7872), 0 states have call successors, (0), 0 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 15:12:56,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 1297.0) internal successors, (20752), 16 states have internal predecessors, (20752), 0 states have call successors, (0), 0 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 15:12:56,058 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 1297.0) internal successors, (20752), 16 states have internal predecessors, (20752), 0 states have call successors, (0), 0 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 15:12:56,059 INFO L175 Difference]: Start difference. First operand has 205 places, 273 transitions, 2895 flow. Second operand 15 states and 7872 transitions. [2022-12-13 15:12:56,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 612 transitions, 7054 flow [2022-12-13 15:12:56,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 612 transitions, 6555 flow, removed 49 selfloop flow, removed 9 redundant places. [2022-12-13 15:12:56,091 INFO L231 Difference]: Finished difference. Result has 218 places, 329 transitions, 4091 flow [2022-12-13 15:12:56,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1297, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4091, PETRI_PLACES=218, PETRI_TRANSITIONS=329} [2022-12-13 15:12:56,092 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 115 predicate places. [2022-12-13 15:12:56,092 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 329 transitions, 4091 flow [2022-12-13 15:12:56,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 508.4117647058824) internal successors, (8643), 17 states have internal predecessors, (8643), 0 states have call successors, (0), 0 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 15:12:56,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:12:56,093 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:12:56,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:12:56,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:12:56,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-12-13 15:12:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1541352487, now seen corresponding path program 1 times [2022-12-13 15:12:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 15:12:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526195051] [2022-12-13 15:12:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:56,296 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 15:12:56,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 15:12:56,299 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:12:56,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ade6bf67-3cb6-4faa-9f7a-5c565bcea097/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 15:12:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:12:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:56,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 15:12:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:12:56,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:12:56,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 15:12:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526195051] [2022-12-13 15:12:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526195051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:56,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:12:56,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-12-13 15:12:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449739818] [2022-12-13 15:12:56,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:56,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:12:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 15:12:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:12:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:13:03,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 522 out of 1297 [2022-12-13 15:13:03,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 329 transitions, 4091 flow. Second operand has 9 states, 9 states have (on average 524.4444444444445) internal successors, (4720), 9 states have internal predecessors, (4720), 0 states have call successors, (0), 0 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 15:13:03,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:13:03,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 522 of 1297 [2022-12-13 15:13:03,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:13:05,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:06,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:08,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:09,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 15:13:11,217 WARN L539 Checker$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 15:13:12,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []