./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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 19:15:21,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:15:21,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:15:21,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:15:21,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:15:21,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:15:21,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:15:21,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:15:21,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:15:21,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:15:21,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:15:21,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:15:21,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:15:21,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:15:21,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:15:21,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:15:21,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:15:21,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:15:21,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:15:21,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:15:21,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:15:21,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:15:21,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:15:21,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:15:21,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:15:21,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:15:21,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:15:21,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:15:21,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:15:21,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:15:21,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:15:21,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:15:21,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:15:21,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:15:21,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:15:21,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:15:21,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:15:21,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:15:21,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:15:21,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:15:21,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:15:21,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:15:21,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:15:21,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:15:21,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:15:21,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:15:21,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:15:21,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:15:21,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:15:21,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:15:21,681 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:15:21,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:15:21,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:15:21,682 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:15:21,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:15:21,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:15:21,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:15:21,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:15:21,684 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:15:21,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:15:21,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:15:21,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:15:21,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:15:21,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:15:21,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:15:21,686 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:15:21,686 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-12-13 19:15:21,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:15:21,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:15:21,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:15:21,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:15:21,898 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:15:21,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 19:15:24,401 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:15:24,574 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:15:24,575 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 19:15:24,580 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/49d6d197e/ffe51b1b7d7946fbbcae01bd88779489/FLAG0504dc680 [2022-12-13 19:15:25,016 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/49d6d197e/ffe51b1b7d7946fbbcae01bd88779489 [2022-12-13 19:15:25,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:15:25,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:15:25,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:15:25,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:15:25,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:15:25,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:15:25" (1/1) ... [2022-12-13 19:15:25,029 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62957b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:25, skipping insertion in model container [2022-12-13 19:15:25,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:15:25" (1/1) ... [2022-12-13 19:15:25,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:15:25,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:15:25,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:25,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:25,179 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:25,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:25,186 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 19:15:25,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:15:25,208 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 19:15:25,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@183b6d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:25, skipping insertion in model container [2022-12-13 19:15:25,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:15:25,209 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 19:15:25,210 INFO L158 Benchmark]: Toolchain (without parser) took 186.79ms. Allocated memory is still 127.9MB. Free memory was 94.0MB in the beginning and 84.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:15:25,210 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 127.9MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:15:25,211 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.15ms. Allocated memory is still 127.9MB. Free memory was 94.0MB in the beginning and 84.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 19:15:25,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 127.9MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.15ms. Allocated memory is still 127.9MB. Free memory was 94.0MB in the beginning and 84.1MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 90]: 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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 19:15:26,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:15:26,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:15:26,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:15:26,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:15:26,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:15:26,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:15:26,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:15:26,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:15:26,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:15:26,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:15:26,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:15:26,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:15:26,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:15:26,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:15:26,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:15:26,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:15:26,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:15:26,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:15:26,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:15:26,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:15:26,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:15:26,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:15:26,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:15:26,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:15:26,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:15:26,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:15:26,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:15:26,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:15:26,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:15:26,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:15:26,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:15:26,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:15:26,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:15:26,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:15:26,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:15:26,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:15:26,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:15:26,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:15:26,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:15:26,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:15:26,615 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 19:15:26,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:15:26,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:15:26,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:15:26,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:15:26,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:15:26,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:15:26,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:15:26,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:15:26,633 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:15:26,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:15:26,634 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:15:26,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:15:26,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:15:26,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:15:26,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:15:26,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:15:26,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:15:26,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:15:26,636 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 19:15:26,640 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 19:15:26,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:15:26,641 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:15:26,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:15:26,641 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 19:15:26,641 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:15:26,641 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-12-13 19:15:26,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:15:26,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:15:26,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:15:26,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:15:26,897 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:15:26,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 19:15:29,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:15:29,721 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:15:29,721 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-12-13 19:15:29,727 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/24804fd20/e68d595500c54ea9893b60bd781490c7/FLAG5cec98f89 [2022-12-13 19:15:29,737 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/data/24804fd20/e68d595500c54ea9893b60bd781490c7 [2022-12-13 19:15:29,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:15:29,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:15:29,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:15:29,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:15:29,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:15:29,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:15:29" (1/1) ... [2022-12-13 19:15:29,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7649b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:29, skipping insertion in model container [2022-12-13 19:15:29,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:15:29" (1/1) ... [2022-12-13 19:15:29,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:15:29,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:15:29,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:29,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:29,924 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:29,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:29,931 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 19:15:29,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:15:29,958 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 19:15:29,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:15:29,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:29,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:29,969 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:29,970 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:29,972 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 19:15:29,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:15:29,983 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:15:29,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:29,998 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:29,999 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 19:15:30,000 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 19:15:30,003 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_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-12-13 19:15:30,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:15:30,025 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:15:30,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30 WrapperNode [2022-12-13 19:15:30,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:15:30,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:15:30,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:15:30,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:15:30,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,069 INFO L138 Inliner]: procedures = 28, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 134 [2022-12-13 19:15:30,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:15:30,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:15:30,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:15:30,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:15:30,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:15:30,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:15:30,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:15:30,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:15:30,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (1/1) ... [2022-12-13 19:15:30,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:15:30,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:15:30,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:15:30,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:15:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:15:30,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 19:15:30,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 19:15:30,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 19:15:30,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 19:15:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 19:15:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:15:30,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:15:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:15:30,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 19:15:30,178 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 19:15:30,273 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:15:30,275 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:15:30,606 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:15:30,726 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:15:30,726 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 19:15:30,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:15:30 BoogieIcfgContainer [2022-12-13 19:15:30,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:15:30,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:15:30,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:15:30,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:15:30,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:15:29" (1/3) ... [2022-12-13 19:15:30,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5570496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:15:30, skipping insertion in model container [2022-12-13 19:15:30,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:15:30" (2/3) ... [2022-12-13 19:15:30,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5570496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:15:30, skipping insertion in model container [2022-12-13 19:15:30,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:15:30" (3/3) ... [2022-12-13 19:15:30,737 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-12-13 19:15:30,753 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:15:30,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-13 19:15:30,754 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:15:30,813 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:15:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 133 transitions, 282 flow [2022-12-13 19:15:30,898 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-13 19:15:30,898 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:15:30,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 9/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 126 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-12-13 19:15:30,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 133 transitions, 282 flow [2022-12-13 19:15:30,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 264 flow [2022-12-13 19:15:30,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:15:30,922 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 264 flow [2022-12-13 19:15:30,924 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 264 flow [2022-12-13 19:15:30,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 264 flow [2022-12-13 19:15:30,955 INFO L130 PetriNetUnfolder]: 9/126 cut-off events. [2022-12-13 19:15:30,955 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:15:30,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2022-12-13 19:15:30,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 840 [2022-12-13 19:15:44,827 INFO L134 LiptonReduction]: Checked pairs total: 1092 [2022-12-13 19:15:44,828 INFO L136 LiptonReduction]: Total number of compositions: 125 [2022-12-13 19:15:44,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:15:44,846 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;@41b5a412, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:15:44,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-13 19:15:44,848 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 19:15:44,849 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:15:44,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:44,849 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:15:44,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 19704, now seen corresponding path program 1 times [2022-12-13 19:15:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715774852] [2022-12-13 19:15:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:44,871 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 19:15:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:44,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:44,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:15:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:45,111 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:45,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:45,149 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 19:15:45,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:45,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715774852] [2022-12-13 19:15:45,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715774852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:45,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:45,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711561363] [2022-12-13 19:15:45,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:45,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2022-12-13 19:15:45,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:45,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:45,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2022-12-13 19:15:45,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:45,670 INFO L130 PetriNetUnfolder]: 643/938 cut-off events. [2022-12-13 19:15:45,671 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-12-13 19:15:45,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 938 events. 643/938 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 4260 event pairs, 295 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 831. Up to 468 conditions per place. [2022-12-13 19:15:45,678 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 54 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-12-13 19:15:45,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 252 flow [2022-12-13 19:15:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2022-12-13 19:15:45,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5180878552971576 [2022-12-13 19:15:45,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2022-12-13 19:15:45,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2022-12-13 19:15:45,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:45,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2022-12-13 19:15:45,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 19:15:45,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:45,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:45,707 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 401 transitions. [2022-12-13 19:15:45,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 252 flow [2022-12-13 19:15:45,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 58 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 19:15:45,713 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 78 flow [2022-12-13 19:15:45,715 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2022-12-13 19:15:45,718 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 19:15:45,719 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 78 flow [2022-12-13 19:15:45,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:45,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:45,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:15:45,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:45,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:45,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash 19703, now seen corresponding path program 1 times [2022-12-13 19:15:45,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:45,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513333276] [2022-12-13 19:15:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:45,922 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 19:15:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:45,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:45,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:15:45,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:45,987 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 19:15:45,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 19:15:45,995 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 19:15:45,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:45,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513333276] [2022-12-13 19:15:45,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513333276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:45,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:45,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997257367] [2022-12-13 19:15:45,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:46,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2022-12-13 19:15:46,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:46,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:46,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2022-12-13 19:15:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:46,245 INFO L130 PetriNetUnfolder]: 653/946 cut-off events. [2022-12-13 19:15:46,245 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:15:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 946 events. 653/946 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 4270 event pairs, 298 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 949. Up to 936 conditions per place. [2022-12-13 19:15:46,251 INFO L137 encePairwiseOnDemand]: 256/258 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-12-13 19:15:46,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 134 flow [2022-12-13 19:15:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-12-13 19:15:46,254 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.479328165374677 [2022-12-13 19:15:46,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-12-13 19:15:46,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-12-13 19:15:46,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:46,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-12-13 19:15:46,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 19:15:46,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:46,259 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:46,259 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 78 flow. Second operand 3 states and 371 transitions. [2022-12-13 19:15:46,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 134 flow [2022-12-13 19:15:46,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:46,260 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 76 flow [2022-12-13 19:15:46,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2022-12-13 19:15:46,261 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2022-12-13 19:15:46,261 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 76 flow [2022-12-13 19:15:46,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:46,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:46,262 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:15:46,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:46,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:46,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash 19763, now seen corresponding path program 1 times [2022-12-13 19:15:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:46,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630413344] [2022-12-13 19:15:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:46,465 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 19:15:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:46,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:46,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 19:15:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:46,582 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 19:15:46,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-13 19:15:46,610 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 19:15:46,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:46,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630413344] [2022-12-13 19:15:46,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630413344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:46,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:46,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473299826] [2022-12-13 19:15:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:46,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:46,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2022-12-13 19:15:46,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:46,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:46,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2022-12-13 19:15:46,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:46,897 INFO L130 PetriNetUnfolder]: 501/742 cut-off events. [2022-12-13 19:15:46,898 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:15:46,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 742 events. 501/742 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 3264 event pairs, 226 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 1487. Up to 732 conditions per place. [2022-12-13 19:15:46,902 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 26 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2022-12-13 19:15:46,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 126 flow [2022-12-13 19:15:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2022-12-13 19:15:46,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2022-12-13 19:15:46,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2022-12-13 19:15:46,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2022-12-13 19:15:46,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:46,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2022-12-13 19:15:46,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 19:15:46,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:46,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:46,908 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 76 flow. Second operand 3 states and 370 transitions. [2022-12-13 19:15:46,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 126 flow [2022-12-13 19:15:46,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:46,910 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 73 flow [2022-12-13 19:15:46,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-12-13 19:15:46,911 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2022-12-13 19:15:46,911 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 73 flow [2022-12-13 19:15:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:46,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:46,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 19:15:46,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 19761, now seen corresponding path program 1 times [2022-12-13 19:15:47,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:47,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465110099] [2022-12-13 19:15:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:47,114 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 19:15:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:47,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 19:15:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:15:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:15:47,233 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 19:15:47,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-13 19:15:47,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 19:15:47,273 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 19:15:47,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:47,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:47,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465110099] [2022-12-13 19:15:47,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465110099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:47,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:47,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317254260] [2022-12-13 19:15:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:47,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2022-12-13 19:15:47,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:47,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:47,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2022-12-13 19:15:47,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:47,557 INFO L130 PetriNetUnfolder]: 349/538 cut-off events. [2022-12-13 19:15:47,557 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 19:15:47,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 538 events. 349/538 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2323 event pairs, 154 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 1079. Up to 528 conditions per place. [2022-12-13 19:15:47,559 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2022-12-13 19:15:47,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 119 flow [2022-12-13 19:15:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2022-12-13 19:15:47,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2022-12-13 19:15:47,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2022-12-13 19:15:47,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2022-12-13 19:15:47,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:47,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2022-12-13 19:15:47,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 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 19:15:47,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:47,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:47,565 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 73 flow. Second operand 3 states and 368 transitions. [2022-12-13 19:15:47,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 119 flow [2022-12-13 19:15:47,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:47,566 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 70 flow [2022-12-13 19:15:47,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-12-13 19:15:47,567 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2022-12-13 19:15:47,567 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 70 flow [2022-12-13 19:15:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 19:15:47,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:47,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 19:15:47,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:15:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:47,770 INFO L85 PathProgramCache]: Analyzing trace with hash 613075, now seen corresponding path program 1 times [2022-12-13 19:15:47,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:47,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946228382] [2022-12-13 19:15:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:15:47,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:47,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:47,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:15:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:47,873 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:47,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:47,914 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 19:15:47,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:48,089 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 19:15:48,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946228382] [2022-12-13 19:15:48,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946228382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:48,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:15:48,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 19:15:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590260117] [2022-12-13 19:15:48,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:48,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:15:48,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:15:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:15:48,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 258 [2022-12-13 19:15:48,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 70 flow. Second operand has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 19:15:48,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:48,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 258 [2022-12-13 19:15:48,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:49,033 INFO L130 PetriNetUnfolder]: 509/794 cut-off events. [2022-12-13 19:15:49,033 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 19:15:49,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 794 events. 509/794 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3777 event pairs, 229 based on Foata normal form. 0/298 useless extension candidates. Maximal degree in co-relation 1593. Up to 263 conditions per place. [2022-12-13 19:15:49,036 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 65 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2022-12-13 19:15:49,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 322 flow [2022-12-13 19:15:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:15:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:15:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 729 transitions. [2022-12-13 19:15:49,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2022-12-13 19:15:49,041 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 729 transitions. [2022-12-13 19:15:49,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 729 transitions. [2022-12-13 19:15:49,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:49,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 729 transitions. [2022-12-13 19:15:49,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 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 19:15:49,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:15:49,044 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:15:49,044 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 70 flow. Second operand 6 states and 729 transitions. [2022-12-13 19:15:49,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 322 flow [2022-12-13 19:15:49,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:49,046 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 123 flow [2022-12-13 19:15:49,046 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2022-12-13 19:15:49,046 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2022-12-13 19:15:49,046 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 123 flow [2022-12-13 19:15:49,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.0) internal successors, (660), 6 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 19:15:49,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:49,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:15:49,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-13 19:15:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 19006140, now seen corresponding path program 1 times [2022-12-13 19:15:49,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:49,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22056226] [2022-12-13 19:15:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:49,252 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 19:15:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:49,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 19:15:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 19:15:49,406 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-13 19:15:49,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-13 19:15:49,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-12-13 19:15:49,439 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 19:15:49,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:49,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:49,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22056226] [2022-12-13 19:15:49,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22056226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:49,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:49,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:49,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877159407] [2022-12-13 19:15:49,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:49,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:49,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:49,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 258 [2022-12-13 19:15:49,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 19:15:49,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:49,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 258 [2022-12-13 19:15:49,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:49,629 INFO L130 PetriNetUnfolder]: 480/735 cut-off events. [2022-12-13 19:15:49,629 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:15:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 735 events. 480/735 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3376 event pairs, 210 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 1498. Up to 720 conditions per place. [2022-12-13 19:15:49,632 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2022-12-13 19:15:49,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 175 flow [2022-12-13 19:15:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:49,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2022-12-13 19:15:49,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2022-12-13 19:15:49,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2022-12-13 19:15:49,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2022-12-13 19:15:49,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:49,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2022-12-13 19:15:49,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 19:15:49,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:49,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:49,636 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 123 flow. Second operand 3 states and 366 transitions. [2022-12-13 19:15:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 175 flow [2022-12-13 19:15:49,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 165 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:49,637 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 111 flow [2022-12-13 19:15:49,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2022-12-13 19:15:49,638 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2022-12-13 19:15:49,638 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 111 flow [2022-12-13 19:15:49,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 19:15:49,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:49,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:15:49,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 19:15:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash 19006139, now seen corresponding path program 1 times [2022-12-13 19:15:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427256138] [2022-12-13 19:15:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:49,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:15:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:49,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:15:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:49,947 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-13 19:15:49,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-13 19:15:49,964 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 19:15:49,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:49,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427256138] [2022-12-13 19:15:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427256138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:49,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:49,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:15:49,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391028781] [2022-12-13 19:15:49,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:49,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:15:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:49,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:15:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:15:50,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 258 [2022-12-13 19:15:50,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 19:15:50,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:50,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 258 [2022-12-13 19:15:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:50,156 INFO L130 PetriNetUnfolder]: 435/660 cut-off events. [2022-12-13 19:15:50,157 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-12-13 19:15:50,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 660 events. 435/660 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 2912 event pairs, 189 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 1344. Up to 645 conditions per place. [2022-12-13 19:15:50,158 INFO L137 encePairwiseOnDemand]: 255/258 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2022-12-13 19:15:50,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 159 flow [2022-12-13 19:15:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:15:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:15:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2022-12-13 19:15:50,160 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.458656330749354 [2022-12-13 19:15:50,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2022-12-13 19:15:50,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2022-12-13 19:15:50,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:50,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2022-12-13 19:15:50,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 19:15:50,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:50,161 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:15:50,162 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 111 flow. Second operand 3 states and 355 transitions. [2022-12-13 19:15:50,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 159 flow [2022-12-13 19:15:50,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:50,162 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 108 flow [2022-12-13 19:15:50,163 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2022-12-13 19:15:50,163 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-12-13 19:15:50,163 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 108 flow [2022-12-13 19:15:50,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 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 19:15:50,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:50,163 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:15:50,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:50,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 589186728, now seen corresponding path program 1 times [2022-12-13 19:15:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369175689] [2022-12-13 19:15:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:50,365 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 19:15:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:50,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:50,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:15:50,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:50,460 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:50,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:50,533 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 19:15:50,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:50,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:50,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369175689] [2022-12-13 19:15:50,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369175689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:50,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:50,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:15:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338761038] [2022-12-13 19:15:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:50,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:15:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:15:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:15:50,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 258 [2022-12-13 19:15:50,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 19:15:50,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:50,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 258 [2022-12-13 19:15:50,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:51,091 INFO L130 PetriNetUnfolder]: 615/984 cut-off events. [2022-12-13 19:15:51,091 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-12-13 19:15:51,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 984 events. 615/984 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 4945 event pairs, 153 based on Foata normal form. 0/471 useless extension candidates. Maximal degree in co-relation 2010. Up to 575 conditions per place. [2022-12-13 19:15:51,094 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2022-12-13 19:15:51,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 221 flow [2022-12-13 19:15:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:15:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:15:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2022-12-13 19:15:51,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4503875968992248 [2022-12-13 19:15:51,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2022-12-13 19:15:51,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2022-12-13 19:15:51,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:51,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2022-12-13 19:15:51,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 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 19:15:51,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:15:51,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:15:51,099 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 108 flow. Second operand 5 states and 581 transitions. [2022-12-13 19:15:51,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 221 flow [2022-12-13 19:15:51,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 19:15:51,101 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 127 flow [2022-12-13 19:15:51,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2022-12-13 19:15:51,101 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2022-12-13 19:15:51,101 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 127 flow [2022-12-13 19:15:51,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 19:15:51,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:51,102 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 19:15:51,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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)] Ended with exit code 0 [2022-12-13 19:15:51,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,303 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash 589186727, now seen corresponding path program 1 times [2022-12-13 19:15:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:51,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428119964] [2022-12-13 19:15:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:51,304 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 19:15:51,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:51,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 19:15:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:51,397 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-13 19:15:51,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-13 19:15:51,413 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 19:15:51,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:51,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:51,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428119964] [2022-12-13 19:15:51,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428119964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:51,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:51,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:15:51,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255941657] [2022-12-13 19:15:51,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:15:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:15:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:15:51,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:15:51,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 19:15:51,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:51,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:15:51,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:51,642 INFO L130 PetriNetUnfolder]: 297/519 cut-off events. [2022-12-13 19:15:51,642 INFO L131 PetriNetUnfolder]: For 73/97 co-relation queries the response was YES. [2022-12-13 19:15:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 519 events. 297/519 cut-off events. For 73/97 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2468 event pairs, 165 based on Foata normal form. 24/369 useless extension candidates. Maximal degree in co-relation 1178. Up to 497 conditions per place. [2022-12-13 19:15:51,645 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 21 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-12-13 19:15:51,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 27 transitions, 173 flow [2022-12-13 19:15:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:15:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 19:15:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2022-12-13 19:15:51,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2022-12-13 19:15:51,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2022-12-13 19:15:51,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2022-12-13 19:15:51,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:51,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2022-12-13 19:15:51,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 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 19:15:51,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 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 19:15:51,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 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 19:15:51,651 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 127 flow. Second operand 4 states and 460 transitions. [2022-12-13 19:15:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 27 transitions, 173 flow [2022-12-13 19:15:51,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 27 transitions, 163 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:15:51,652 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 121 flow [2022-12-13 19:15:51,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2022-12-13 19:15:51,653 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2022-12-13 19:15:51,653 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 121 flow [2022-12-13 19:15:51,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 19:15:51,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:51,654 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:15:51,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 19:15:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1084921724, now seen corresponding path program 1 times [2022-12-13 19:15:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648245569] [2022-12-13 19:15:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:51,858 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 19:15:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:51,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 19:15:51,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:52,047 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:52,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:15:52,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:15:52,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:52,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648245569] [2022-12-13 19:15:52,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648245569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:15:52,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:15:52,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:15:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550635281] [2022-12-13 19:15:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:15:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:15:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:15:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:15:52,425 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 258 [2022-12-13 19:15:52,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 19:15:52,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:52,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 258 [2022-12-13 19:15:52,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:52,703 INFO L130 PetriNetUnfolder]: 251/453 cut-off events. [2022-12-13 19:15:52,703 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-13 19:15:52,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 453 events. 251/453 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2023 event pairs, 132 based on Foata normal form. 8/327 useless extension candidates. Maximal degree in co-relation 1019. Up to 385 conditions per place. [2022-12-13 19:15:52,706 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2022-12-13 19:15:52,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 258 flow [2022-12-13 19:15:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:15:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:15:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-12-13 19:15:52,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4542635658914729 [2022-12-13 19:15:52,708 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-12-13 19:15:52,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-12-13 19:15:52,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-12-13 19:15:52,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 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 19:15:52,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:15:52,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:15:52,712 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 121 flow. Second operand 5 states and 586 transitions. [2022-12-13 19:15:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 258 flow [2022-12-13 19:15:52,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 19:15:52,714 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 151 flow [2022-12-13 19:15:52,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2022-12-13 19:15:52,715 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2022-12-13 19:15:52,715 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 151 flow [2022-12-13 19:15:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 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 19:15:52,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:52,715 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 19:15:52,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:52,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:52,916 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1086483384, now seen corresponding path program 2 times [2022-12-13 19:15:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743166966] [2022-12-13 19:15:52,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:15:52,917 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 19:15:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:52,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:52,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:52,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:15:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:15:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 19:15:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:53,046 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:53,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:53,186 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 19:15:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:53,828 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 19:15:53,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743166966] [2022-12-13 19:15:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743166966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:53,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:15:53,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 19:15:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424782374] [2022-12-13 19:15:53,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:53,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:15:53,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:15:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:15:56,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:15:56,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 151 flow. Second operand has 12 states, 12 states have (on average 111.0) internal successors, (1332), 12 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 19:15:56,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:15:56,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:15:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:15:58,867 INFO L130 PetriNetUnfolder]: 1025/1767 cut-off events. [2022-12-13 19:15:58,867 INFO L131 PetriNetUnfolder]: For 1018/1095 co-relation queries the response was YES. [2022-12-13 19:15:58,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4575 conditions, 1767 events. 1025/1767 cut-off events. For 1018/1095 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10163 event pairs, 528 based on Foata normal form. 83/1519 useless extension candidates. Maximal degree in co-relation 4553. Up to 379 conditions per place. [2022-12-13 19:15:58,873 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 158 selfloop transitions, 12 changer transitions 0/173 dead transitions. [2022-12-13 19:15:58,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 173 transitions, 972 flow [2022-12-13 19:15:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:15:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 19:15:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1487 transitions. [2022-12-13 19:15:58,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.480297157622739 [2022-12-13 19:15:58,876 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1487 transitions. [2022-12-13 19:15:58,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1487 transitions. [2022-12-13 19:15:58,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:15:58,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1487 transitions. [2022-12-13 19:15:58,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.91666666666667) internal successors, (1487), 12 states have internal predecessors, (1487), 0 states have call successors, (0), 0 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 19:15:58,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 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 19:15:58,881 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 258.0) internal successors, (3354), 13 states have internal predecessors, (3354), 0 states have call successors, (0), 0 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 19:15:58,881 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 151 flow. Second operand 12 states and 1487 transitions. [2022-12-13 19:15:58,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 173 transitions, 972 flow [2022-12-13 19:15:58,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 173 transitions, 962 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 19:15:58,884 INFO L231 Difference]: Finished difference. Result has 61 places, 36 transitions, 240 flow [2022-12-13 19:15:58,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=36} [2022-12-13 19:15:58,884 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2022-12-13 19:15:58,885 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 36 transitions, 240 flow [2022-12-13 19:15:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.0) internal successors, (1332), 12 states have internal predecessors, (1332), 0 states have call successors, (0), 0 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 19:15:58,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:15:58,885 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:15:58,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 19:15:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:59,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:15:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:15:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -680312873, now seen corresponding path program 1 times [2022-12-13 19:15:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:15:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049513510] [2022-12-13 19:15:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:15:59,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:15:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:15:59,092 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:15:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:15:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:15:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:15:59,273 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:15:59,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:15:59,383 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 19:15:59,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:15:59,709 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 19:15:59,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:15:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049513510] [2022-12-13 19:15:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049513510] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:15:59,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:15:59,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:15:59,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461532961] [2022-12-13 19:15:59,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:15:59,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:15:59,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:15:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:15:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:16:01,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 258 [2022-12-13 19:16:01,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 36 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 108.4) internal successors, (1084), 10 states have internal predecessors, (1084), 0 states have call successors, (0), 0 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 19:16:01,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:01,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 258 [2022-12-13 19:16:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:02,416 INFO L130 PetriNetUnfolder]: 2069/3294 cut-off events. [2022-12-13 19:16:02,416 INFO L131 PetriNetUnfolder]: For 1589/1609 co-relation queries the response was YES. [2022-12-13 19:16:02,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8488 conditions, 3294 events. 2069/3294 cut-off events. For 1589/1609 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19161 event pairs, 226 based on Foata normal form. 2/2757 useless extension candidates. Maximal degree in co-relation 8459. Up to 873 conditions per place. [2022-12-13 19:16:02,427 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 60 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2022-12-13 19:16:02,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 496 flow [2022-12-13 19:16:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:16:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:16:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 918 transitions. [2022-12-13 19:16:02,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2022-12-13 19:16:02,435 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 918 transitions. [2022-12-13 19:16:02,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 918 transitions. [2022-12-13 19:16:02,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:02,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 918 transitions. [2022-12-13 19:16:02,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.75) internal successors, (918), 8 states have internal predecessors, (918), 0 states have call successors, (0), 0 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 19:16:02,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:16:02,440 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:16:02,440 INFO L175 Difference]: Start difference. First operand has 61 places, 36 transitions, 240 flow. Second operand 8 states and 918 transitions. [2022-12-13 19:16:02,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 496 flow [2022-12-13 19:16:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 471 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-12-13 19:16:02,443 INFO L231 Difference]: Finished difference. Result has 68 places, 41 transitions, 289 flow [2022-12-13 19:16:02,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=68, PETRI_TRANSITIONS=41} [2022-12-13 19:16:02,444 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2022-12-13 19:16:02,444 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 41 transitions, 289 flow [2022-12-13 19:16:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.4) internal successors, (1084), 10 states have internal predecessors, (1084), 0 states have call successors, (0), 0 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 19:16:02,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:02,445 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:02,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:02,646 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash -723370488, now seen corresponding path program 1 times [2022-12-13 19:16:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947694422] [2022-12-13 19:16:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:02,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:02,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:16:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:02,781 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:16:02,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:16:02,851 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 19:16:02,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:16:02,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:02,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947694422] [2022-12-13 19:16:02,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947694422] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:16:02,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:16:02,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:16:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748342290] [2022-12-13 19:16:02,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:16:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:16:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:16:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:16:03,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 258 [2022-12-13 19:16:03,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 41 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 19:16:03,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:03,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 258 [2022-12-13 19:16:03,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:03,681 INFO L130 PetriNetUnfolder]: 2312/3970 cut-off events. [2022-12-13 19:16:03,681 INFO L131 PetriNetUnfolder]: For 6318/6645 co-relation queries the response was YES. [2022-12-13 19:16:03,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12840 conditions, 3970 events. 2312/3970 cut-off events. For 6318/6645 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24815 event pairs, 1119 based on Foata normal form. 327/4027 useless extension candidates. Maximal degree in co-relation 12806. Up to 2760 conditions per place. [2022-12-13 19:16:03,699 INFO L137 encePairwiseOnDemand]: 253/258 looper letters, 47 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2022-12-13 19:16:03,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 486 flow [2022-12-13 19:16:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:16:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:16:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 575 transitions. [2022-12-13 19:16:03,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2022-12-13 19:16:03,701 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 575 transitions. [2022-12-13 19:16:03,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 575 transitions. [2022-12-13 19:16:03,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:03,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 575 transitions. [2022-12-13 19:16:03,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 19:16:03,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:16:03,704 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 258.0) internal successors, (1548), 6 states have internal predecessors, (1548), 0 states have call successors, (0), 0 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 19:16:03,704 INFO L175 Difference]: Start difference. First operand has 68 places, 41 transitions, 289 flow. Second operand 5 states and 575 transitions. [2022-12-13 19:16:03,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 486 flow [2022-12-13 19:16:03,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 459 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:03,711 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 299 flow [2022-12-13 19:16:03,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2022-12-13 19:16:03,711 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-12-13 19:16:03,712 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 299 flow [2022-12-13 19:16:03,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 states have internal predecessors, (552), 0 states have call successors, (0), 0 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 19:16:03,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:03,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:03,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:03,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:03,915 INFO L85 PathProgramCache]: Analyzing trace with hash -828012022, now seen corresponding path program 1 times [2022-12-13 19:16:03,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:03,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946987503] [2022-12-13 19:16:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:16:03,917 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 19:16:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:03,920 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:03,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:16:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:16:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:04,058 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:16:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:16:04,168 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 19:16:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:04,525 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 19:16:04,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946987503] [2022-12-13 19:16:04,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946987503] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:04,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:04,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-12-13 19:16:04,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811555358] [2022-12-13 19:16:04,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:04,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:16:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:16:04,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:16:05,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 258 [2022-12-13 19:16:05,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 299 flow. Second operand has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 19:16:05,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:05,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 258 [2022-12-13 19:16:05,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:07,369 INFO L130 PetriNetUnfolder]: 4148/6796 cut-off events. [2022-12-13 19:16:07,369 INFO L131 PetriNetUnfolder]: For 10022/10268 co-relation queries the response was YES. [2022-12-13 19:16:07,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22928 conditions, 6796 events. 4148/6796 cut-off events. For 10022/10268 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 43023 event pairs, 858 based on Foata normal form. 930/7690 useless extension candidates. Maximal degree in co-relation 22893. Up to 2112 conditions per place. [2022-12-13 19:16:07,394 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 86 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2022-12-13 19:16:07,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 799 flow [2022-12-13 19:16:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:16:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:16:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2022-12-13 19:16:07,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4428294573643411 [2022-12-13 19:16:07,397 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2022-12-13 19:16:07,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2022-12-13 19:16:07,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:07,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2022-12-13 19:16:07,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 19:16:07,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:16:07,400 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:16:07,400 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 299 flow. Second operand 8 states and 914 transitions. [2022-12-13 19:16:07,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 799 flow [2022-12-13 19:16:07,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 785 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:07,409 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 368 flow [2022-12-13 19:16:07,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=368, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2022-12-13 19:16:07,409 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2022-12-13 19:16:07,409 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 368 flow [2022-12-13 19:16:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 108.8) internal successors, (1088), 10 states have internal predecessors, (1088), 0 states have call successors, (0), 0 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 19:16:07,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:07,410 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:16:07,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:07,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash 752193901, now seen corresponding path program 2 times [2022-12-13 19:16:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213789228] [2022-12-13 19:16:07,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:16:07,612 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 19:16:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:07,613 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:07,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:07,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:16:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:16:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:07,826 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:16:07,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:16:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:08,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:09,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213789228] [2022-12-13 19:16:09,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213789228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:09,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:09,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:16:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100767044] [2022-12-13 19:16:09,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:09,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:16:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:16:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:16:16,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 258 [2022-12-13 19:16:16,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 368 flow. Second operand has 17 states, 17 states have (on average 106.17647058823529) internal successors, (1805), 17 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 19:16:16,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:16,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 258 [2022-12-13 19:16:16,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:21,702 INFO L130 PetriNetUnfolder]: 4087/6843 cut-off events. [2022-12-13 19:16:21,702 INFO L131 PetriNetUnfolder]: For 21443/22099 co-relation queries the response was YES. [2022-12-13 19:16:21,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28234 conditions, 6843 events. 4087/6843 cut-off events. For 21443/22099 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 45273 event pairs, 2025 based on Foata normal form. 710/7553 useless extension candidates. Maximal degree in co-relation 28195. Up to 4270 conditions per place. [2022-12-13 19:16:21,731 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 211 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2022-12-13 19:16:21,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 237 transitions, 2031 flow [2022-12-13 19:16:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:16:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 19:16:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2050 transitions. [2022-12-13 19:16:21,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44142980189491815 [2022-12-13 19:16:21,748 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2050 transitions. [2022-12-13 19:16:21,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2050 transitions. [2022-12-13 19:16:21,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:21,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2050 transitions. [2022-12-13 19:16:21,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 113.88888888888889) internal successors, (2050), 18 states have internal predecessors, (2050), 0 states have call successors, (0), 0 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 19:16:21,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 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 19:16:21,765 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 258.0) internal successors, (4902), 19 states have internal predecessors, (4902), 0 states have call successors, (0), 0 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 19:16:21,765 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 368 flow. Second operand 18 states and 2050 transitions. [2022-12-13 19:16:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 237 transitions, 2031 flow [2022-12-13 19:16:21,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 237 transitions, 1924 flow, removed 44 selfloop flow, removed 3 redundant places. [2022-12-13 19:16:21,786 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 567 flow [2022-12-13 19:16:21,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=567, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2022-12-13 19:16:21,787 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 62 predicate places. [2022-12-13 19:16:21,787 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 567 flow [2022-12-13 19:16:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.17647058823529) internal successors, (1805), 17 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 19:16:21,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:21,788 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 19:16:21,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:21,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:21,988 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:21,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -390625832, now seen corresponding path program 3 times [2022-12-13 19:16:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:21,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669465865] [2022-12-13 19:16:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:16:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:21,990 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:21,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:22,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 19:16:22,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:22,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 19:16:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:22,191 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:16:22,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:16:22,489 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 19:16:22,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:25,154 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 19:16:25,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669465865] [2022-12-13 19:16:25,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669465865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:25,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:25,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:16:25,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143584012] [2022-12-13 19:16:25,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:25,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:16:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:16:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:16:37,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:16:37,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 567 flow. Second operand has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 0 states have call successors, (0), 0 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 19:16:37,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:16:37,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:16:37,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:16:55,928 INFO L130 PetriNetUnfolder]: 9102/15058 cut-off events. [2022-12-13 19:16:55,928 INFO L131 PetriNetUnfolder]: For 57494/59494 co-relation queries the response was YES. [2022-12-13 19:16:55,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65940 conditions, 15058 events. 9102/15058 cut-off events. For 57494/59494 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 101517 event pairs, 6248 based on Foata normal form. 1863/16859 useless extension candidates. Maximal degree in co-relation 65895. Up to 3339 conditions per place. [2022-12-13 19:16:56,014 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 581 selfloop transitions, 24 changer transitions 0/610 dead transitions. [2022-12-13 19:16:56,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 610 transitions, 5583 flow [2022-12-13 19:16:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:16:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 19:16:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3003 transitions. [2022-12-13 19:16:56,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48498062015503873 [2022-12-13 19:16:56,019 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3003 transitions. [2022-12-13 19:16:56,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3003 transitions. [2022-12-13 19:16:56,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:16:56,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3003 transitions. [2022-12-13 19:16:56,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 125.125) internal successors, (3003), 24 states have internal predecessors, (3003), 0 states have call successors, (0), 0 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 19:16:56,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 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 19:16:56,028 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 258.0) internal successors, (6450), 25 states have internal predecessors, (6450), 0 states have call successors, (0), 0 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 19:16:56,028 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 567 flow. Second operand 24 states and 3003 transitions. [2022-12-13 19:16:56,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 610 transitions, 5583 flow [2022-12-13 19:16:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 610 transitions, 5495 flow, removed 23 selfloop flow, removed 9 redundant places. [2022-12-13 19:16:56,110 INFO L231 Difference]: Finished difference. Result has 125 places, 75 transitions, 687 flow [2022-12-13 19:16:56,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=687, PETRI_PLACES=125, PETRI_TRANSITIONS=75} [2022-12-13 19:16:56,110 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2022-12-13 19:16:56,110 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 75 transitions, 687 flow [2022-12-13 19:16:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 111.0) internal successors, (2664), 24 states have internal predecessors, (2664), 0 states have call successors, (0), 0 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 19:16:56,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:16:56,111 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-12-13 19:16:56,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 19:16:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:56,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:16:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:16:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 495320540, now seen corresponding path program 3 times [2022-12-13 19:16:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:16:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108389320] [2022-12-13 19:16:56,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:16:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:16:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:16:56,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:56,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:16:56,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:16:56,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:16:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:16:56,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:16:56,624 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:16:56,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:16:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:56,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:16:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:16:58,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:16:58,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108389320] [2022-12-13 19:16:58,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108389320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:16:58,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:16:58,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-12-13 19:16:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134174535] [2022-12-13 19:16:58,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:16:58,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 19:16:58,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:16:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 19:16:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:17:08,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 258 [2022-12-13 19:17:08,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 75 transitions, 687 flow. Second operand has 21 states, 21 states have (on average 106.14285714285714) internal successors, (2229), 21 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 19:17:08,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:08,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 258 [2022-12-13 19:17:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:18,124 INFO L130 PetriNetUnfolder]: 9449/15631 cut-off events. [2022-12-13 19:17:18,125 INFO L131 PetriNetUnfolder]: For 60169/61775 co-relation queries the response was YES. [2022-12-13 19:17:18,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68485 conditions, 15631 events. 9449/15631 cut-off events. For 60169/61775 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 105374 event pairs, 5326 based on Foata normal form. 1663/17294 useless extension candidates. Maximal degree in co-relation 68430. Up to 12091 conditions per place. [2022-12-13 19:17:18,229 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 314 selfloop transitions, 43 changer transitions 0/358 dead transitions. [2022-12-13 19:17:18,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 358 transitions, 3220 flow [2022-12-13 19:17:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 19:17:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 19:17:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2853 transitions. [2022-12-13 19:17:18,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44232558139534883 [2022-12-13 19:17:18,235 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2853 transitions. [2022-12-13 19:17:18,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2853 transitions. [2022-12-13 19:17:18,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:18,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2853 transitions. [2022-12-13 19:17:18,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 114.12) internal successors, (2853), 25 states have internal predecessors, (2853), 0 states have call successors, (0), 0 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 19:17:18,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 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 19:17:18,246 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 258.0) internal successors, (6708), 26 states have internal predecessors, (6708), 0 states have call successors, (0), 0 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 19:17:18,246 INFO L175 Difference]: Start difference. First operand has 125 places, 75 transitions, 687 flow. Second operand 25 states and 2853 transitions. [2022-12-13 19:17:18,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 358 transitions, 3220 flow [2022-12-13 19:17:18,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 358 transitions, 3172 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-13 19:17:18,373 INFO L231 Difference]: Finished difference. Result has 148 places, 92 transitions, 963 flow [2022-12-13 19:17:18,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=963, PETRI_PLACES=148, PETRI_TRANSITIONS=92} [2022-12-13 19:17:18,374 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 112 predicate places. [2022-12-13 19:17:18,374 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 92 transitions, 963 flow [2022-12-13 19:17:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 106.14285714285714) internal successors, (2229), 21 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 19:17:18,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:18,375 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:18,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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)] Forceful destruction successful, exit code 0 [2022-12-13 19:17:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:18,577 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1306560435, now seen corresponding path program 2 times [2022-12-13 19:17:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:18,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175023565] [2022-12-13 19:17:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:17:18,580 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 19:17:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:18,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:18,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:18,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:17:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:18,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 19:17:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:18,756 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:17:18,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:17:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:18,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:17:20,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:20,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175023565] [2022-12-13 19:17:20,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175023565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:20,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:17:20,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-12-13 19:17:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030834009] [2022-12-13 19:17:20,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:20,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:17:20,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:20,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:17:20,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:17:28,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 258 [2022-12-13 19:17:28,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 92 transitions, 963 flow. Second operand has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 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 19:17:28,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:28,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 258 [2022-12-13 19:17:28,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:38,654 INFO L130 PetriNetUnfolder]: 9954/16623 cut-off events. [2022-12-13 19:17:38,654 INFO L131 PetriNetUnfolder]: For 81114/81825 co-relation queries the response was YES. [2022-12-13 19:17:38,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78228 conditions, 16623 events. 9954/16623 cut-off events. For 81114/81825 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 115244 event pairs, 4441 based on Foata normal form. 649/17191 useless extension candidates. Maximal degree in co-relation 78163. Up to 9105 conditions per place. [2022-12-13 19:17:38,757 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 295 selfloop transitions, 33 changer transitions 0/334 dead transitions. [2022-12-13 19:17:38,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 334 transitions, 3639 flow [2022-12-13 19:17:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:17:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:17:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2385 transitions. [2022-12-13 19:17:38,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4201902748414376 [2022-12-13 19:17:38,761 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2385 transitions. [2022-12-13 19:17:38,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2385 transitions. [2022-12-13 19:17:38,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:38,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2385 transitions. [2022-12-13 19:17:38,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.4090909090909) internal successors, (2385), 22 states have internal predecessors, (2385), 0 states have call successors, (0), 0 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 19:17:38,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:17:38,768 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:17:38,768 INFO L175 Difference]: Start difference. First operand has 148 places, 92 transitions, 963 flow. Second operand 22 states and 2385 transitions. [2022-12-13 19:17:38,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 334 transitions, 3639 flow [2022-12-13 19:17:38,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 334 transitions, 3488 flow, removed 63 selfloop flow, removed 9 redundant places. [2022-12-13 19:17:38,922 INFO L231 Difference]: Finished difference. Result has 165 places, 107 transitions, 1121 flow [2022-12-13 19:17:38,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1121, PETRI_PLACES=165, PETRI_TRANSITIONS=107} [2022-12-13 19:17:38,922 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 129 predicate places. [2022-12-13 19:17:38,922 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 107 transitions, 1121 flow [2022-12-13 19:17:38,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.33333333333333) internal successors, (1842), 18 states have internal predecessors, (1842), 0 states have call successors, (0), 0 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 19:17:38,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:38,922 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-13 19:17:38,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-13 19:17:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:39,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1496818920, now seen corresponding path program 4 times [2022-12-13 19:17:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:39,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462765943] [2022-12-13 19:17:39,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:17:39,126 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 19:17:39,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:39,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-13 19:17:39,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:17:39,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:17:39,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 19:17:39,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:39,421 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:17:39,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:17:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:17:39,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:17:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 19:17:40,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:40,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462765943] [2022-12-13 19:17:40,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462765943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:17:40,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:17:40,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 19:17:40,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969133847] [2022-12-13 19:17:40,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:17:40,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:17:40,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:40,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:17:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:17:45,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 258 [2022-12-13 19:17:45,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 107 transitions, 1121 flow. Second operand has 16 states, 16 states have (on average 108.25) internal successors, (1732), 16 states have internal predecessors, (1732), 0 states have call successors, (0), 0 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 19:17:45,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:45,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 258 [2022-12-13 19:17:45,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:17:58,222 INFO L130 PetriNetUnfolder]: 19716/33786 cut-off events. [2022-12-13 19:17:58,223 INFO L131 PetriNetUnfolder]: For 269683/276816 co-relation queries the response was YES. [2022-12-13 19:17:58,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171296 conditions, 33786 events. 19716/33786 cut-off events. For 269683/276816 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 275371 event pairs, 1262 based on Foata normal form. 5912/39655 useless extension candidates. Maximal degree in co-relation 171226. Up to 7717 conditions per place. [2022-12-13 19:17:58,488 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 347 selfloop transitions, 42 changer transitions 0/393 dead transitions. [2022-12-13 19:17:58,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 393 transitions, 4696 flow [2022-12-13 19:17:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:17:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 19:17:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1639 transitions. [2022-12-13 19:17:58,491 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.453765227021041 [2022-12-13 19:17:58,491 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1639 transitions. [2022-12-13 19:17:58,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1639 transitions. [2022-12-13 19:17:58,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:17:58,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1639 transitions. [2022-12-13 19:17:58,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.07142857142857) internal successors, (1639), 14 states have internal predecessors, (1639), 0 states have call successors, (0), 0 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 19:17:58,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 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 19:17:58,496 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 258.0) internal successors, (3870), 15 states have internal predecessors, (3870), 0 states have call successors, (0), 0 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 19:17:58,496 INFO L175 Difference]: Start difference. First operand has 165 places, 107 transitions, 1121 flow. Second operand 14 states and 1639 transitions. [2022-12-13 19:17:58,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 393 transitions, 4696 flow [2022-12-13 19:17:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 393 transitions, 4347 flow, removed 168 selfloop flow, removed 4 redundant places. [2022-12-13 19:17:58,917 INFO L231 Difference]: Finished difference. Result has 181 places, 114 transitions, 1271 flow [2022-12-13 19:17:58,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1271, PETRI_PLACES=181, PETRI_TRANSITIONS=114} [2022-12-13 19:17:58,918 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2022-12-13 19:17:58,918 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 114 transitions, 1271 flow [2022-12-13 19:17:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 108.25) internal successors, (1732), 16 states have internal predecessors, (1732), 0 states have call successors, (0), 0 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 19:17:58,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:17:58,918 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:17:58,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-13 19:17:59,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:59,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:17:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:17:59,121 INFO L85 PathProgramCache]: Analyzing trace with hash 578598119, now seen corresponding path program 1 times [2022-12-13 19:17:59,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:17:59,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93753149] [2022-12-13 19:17:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:17:59,122 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 19:17:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:17:59,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:17:59,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-13 19:17:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:17:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:17:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:17:59,259 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 19:17:59,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:17:59,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:17:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93753149] [2022-12-13 19:17:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93753149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:17:59,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:17:59,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 19:17:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458894682] [2022-12-13 19:17:59,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:17:59,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:17:59,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:17:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:17:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:17:59,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 258 [2022-12-13 19:17:59,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 114 transitions, 1271 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 19:17:59,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:17:59,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 258 [2022-12-13 19:17:59,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:05,383 INFO L130 PetriNetUnfolder]: 19402/33312 cut-off events. [2022-12-13 19:18:05,383 INFO L131 PetriNetUnfolder]: For 243714/251106 co-relation queries the response was YES. [2022-12-13 19:18:05,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179871 conditions, 33312 events. 19402/33312 cut-off events. For 243714/251106 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 268544 event pairs, 8100 based on Foata normal form. 4062/37206 useless extension candidates. Maximal degree in co-relation 179793. Up to 32461 conditions per place. [2022-12-13 19:18:05,741 INFO L137 encePairwiseOnDemand]: 254/258 looper letters, 108 selfloop transitions, 11 changer transitions 5/132 dead transitions. [2022-12-13 19:18:05,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 132 transitions, 1668 flow [2022-12-13 19:18:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:18:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:18:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2022-12-13 19:18:05,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49870801033591733 [2022-12-13 19:18:05,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2022-12-13 19:18:05,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2022-12-13 19:18:05,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:05,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2022-12-13 19:18:05,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 19:18:05,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:18:05,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 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 19:18:05,746 INFO L175 Difference]: Start difference. First operand has 181 places, 114 transitions, 1271 flow. Second operand 3 states and 386 transitions. [2022-12-13 19:18:05,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 132 transitions, 1668 flow [2022-12-13 19:18:06,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 132 transitions, 1562 flow, removed 23 selfloop flow, removed 6 redundant places. [2022-12-13 19:18:06,506 INFO L231 Difference]: Finished difference. Result has 178 places, 118 transitions, 1293 flow [2022-12-13 19:18:06,506 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1293, PETRI_PLACES=178, PETRI_TRANSITIONS=118} [2022-12-13 19:18:06,507 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 142 predicate places. [2022-12-13 19:18:06,507 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 118 transitions, 1293 flow [2022-12-13 19:18:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 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 19:18:06,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:06,507 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:06,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 19:18:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:06,708 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:18:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash -58399217, now seen corresponding path program 3 times [2022-12-13 19:18:06,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:18:06,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001585429] [2022-12-13 19:18:06,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:18:06,711 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 19:18:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:18:06,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:06,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-13 19:18:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:18:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:18:07,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:07,182 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:18:07,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:18:07,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 19:18:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:18:07,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:18:07,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:18:07,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001585429] [2022-12-13 19:18:07,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001585429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:07,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:18:07,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 19:18:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706290095] [2022-12-13 19:18:07,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:07,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:18:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:18:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:18:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 19:18:09,692 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 258 [2022-12-13 19:18:09,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 118 transitions, 1293 flow. Second operand has 16 states, 16 states have (on average 104.5) internal successors, (1672), 16 states have internal predecessors, (1672), 0 states have call successors, (0), 0 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 19:18:09,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:09,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 258 [2022-12-13 19:18:09,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:17,375 INFO L130 PetriNetUnfolder]: 20813/35685 cut-off events. [2022-12-13 19:18:17,375 INFO L131 PetriNetUnfolder]: For 262028/262860 co-relation queries the response was YES. [2022-12-13 19:18:17,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179256 conditions, 35685 events. 20813/35685 cut-off events. For 262028/262860 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 286444 event pairs, 10924 based on Foata normal form. 752/36363 useless extension candidates. Maximal degree in co-relation 179177. Up to 22446 conditions per place. [2022-12-13 19:18:17,710 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 171 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2022-12-13 19:18:17,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 204 transitions, 2339 flow [2022-12-13 19:18:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:18:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 19:18:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1636 transitions. [2022-12-13 19:18:17,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4227390180878553 [2022-12-13 19:18:17,713 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1636 transitions. [2022-12-13 19:18:17,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1636 transitions. [2022-12-13 19:18:17,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:17,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1636 transitions. [2022-12-13 19:18:17,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 109.06666666666666) internal successors, (1636), 15 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 19:18:17,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 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 19:18:17,718 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 258.0) internal successors, (4128), 16 states have internal predecessors, (4128), 0 states have call successors, (0), 0 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 19:18:17,718 INFO L175 Difference]: Start difference. First operand has 178 places, 118 transitions, 1293 flow. Second operand 15 states and 1636 transitions. [2022-12-13 19:18:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 204 transitions, 2339 flow [2022-12-13 19:18:18,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 204 transitions, 2297 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-13 19:18:18,764 INFO L231 Difference]: Finished difference. Result has 190 places, 119 transitions, 1371 flow [2022-12-13 19:18:18,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1371, PETRI_PLACES=190, PETRI_TRANSITIONS=119} [2022-12-13 19:18:18,765 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 154 predicate places. [2022-12-13 19:18:18,765 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 119 transitions, 1371 flow [2022-12-13 19:18:18,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 104.5) internal successors, (1672), 16 states have internal predecessors, (1672), 0 states have call successors, (0), 0 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 19:18:18,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:18,765 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:18,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 19:18:18,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:18,966 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:18:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash -394722454, now seen corresponding path program 4 times [2022-12-13 19:18:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:18:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777338924] [2022-12-13 19:18:18,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:18:18,969 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 19:18:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:18:18,972 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-13 19:18:19,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:18:19,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 19:18:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:19,232 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:18:19,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:18:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:18:19,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:21,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:18:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777338924] [2022-12-13 19:18:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777338924] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:21,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:18:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-12-13 19:18:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729086656] [2022-12-13 19:18:21,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:18:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:18:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:18:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:18:34,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 258 [2022-12-13 19:18:34,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 119 transitions, 1371 flow. Second operand has 22 states, 22 states have (on average 105.36363636363636) internal successors, (2318), 22 states have internal predecessors, (2318), 0 states have call successors, (0), 0 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 19:18:34,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:18:34,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 258 [2022-12-13 19:18:34,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:18:46,318 INFO L130 PetriNetUnfolder]: 20507/35255 cut-off events. [2022-12-13 19:18:46,318 INFO L131 PetriNetUnfolder]: For 272311/273149 co-relation queries the response was YES. [2022-12-13 19:18:46,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187675 conditions, 35255 events. 20507/35255 cut-off events. For 272311/273149 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 276935 event pairs, 14825 based on Foata normal form. 755/35938 useless extension candidates. Maximal degree in co-relation 187590. Up to 32818 conditions per place. [2022-12-13 19:18:46,729 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 252 selfloop transitions, 41 changer transitions 0/298 dead transitions. [2022-12-13 19:18:46,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3301 flow [2022-12-13 19:18:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:18:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:18:46,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2443 transitions. [2022-12-13 19:18:46,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43040873854827344 [2022-12-13 19:18:46,735 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2443 transitions. [2022-12-13 19:18:46,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2443 transitions. [2022-12-13 19:18:46,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:18:46,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2443 transitions. [2022-12-13 19:18:46,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 111.04545454545455) internal successors, (2443), 22 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 19:18:46,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:18:46,746 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:18:46,746 INFO L175 Difference]: Start difference. First operand has 190 places, 119 transitions, 1371 flow. Second operand 22 states and 2443 transitions. [2022-12-13 19:18:46,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3301 flow [2022-12-13 19:18:48,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 298 transitions, 3254 flow, removed 14 selfloop flow, removed 7 redundant places. [2022-12-13 19:18:48,909 INFO L231 Difference]: Finished difference. Result has 206 places, 132 transitions, 1633 flow [2022-12-13 19:18:48,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1633, PETRI_PLACES=206, PETRI_TRANSITIONS=132} [2022-12-13 19:18:48,909 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 170 predicate places. [2022-12-13 19:18:48,909 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 132 transitions, 1633 flow [2022-12-13 19:18:48,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 105.36363636363636) internal successors, (2318), 22 states have internal predecessors, (2318), 0 states have call successors, (0), 0 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 19:18:48,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:18:48,910 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:18:48,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 19:18:49,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:49,111 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:18:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:18:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1313511688, now seen corresponding path program 5 times [2022-12-13 19:18:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:18:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523963275] [2022-12-13 19:18:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:18:49,113 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 19:18:49,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:18:49,116 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:18:49,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (24)] Waiting until timeout for monitored process [2022-12-13 19:18:49,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 19:18:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:18:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 19:18:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:18:49,406 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:18:49,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:18:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:49,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:18:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:18:52,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:18:52,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523963275] [2022-12-13 19:18:52,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523963275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:18:52,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:18:52,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 19:18:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212982929] [2022-12-13 19:18:52,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:18:52,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 19:18:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:18:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 19:18:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 19:19:08,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 258 [2022-12-13 19:19:08,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 132 transitions, 1633 flow. Second operand has 24 states, 24 states have (on average 102.25) internal successors, (2454), 24 states have internal predecessors, (2454), 0 states have call successors, (0), 0 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 19:19:08,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:08,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 258 [2022-12-13 19:19:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:37,554 INFO L130 PetriNetUnfolder]: 32315/52733 cut-off events. [2022-12-13 19:19:37,555 INFO L131 PetriNetUnfolder]: For 312855/313329 co-relation queries the response was YES. [2022-12-13 19:19:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292562 conditions, 52733 events. 32315/52733 cut-off events. For 312855/313329 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 405249 event pairs, 3063 based on Foata normal form. 12205/64866 useless extension candidates. Maximal degree in co-relation 292474. Up to 13760 conditions per place. [2022-12-13 19:19:38,191 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 607 selfloop transitions, 55 changer transitions 0/667 dead transitions. [2022-12-13 19:19:38,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 667 transitions, 8176 flow [2022-12-13 19:19:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 19:19:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 19:19:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4101 transitions. [2022-12-13 19:19:38,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182986536107711 [2022-12-13 19:19:38,198 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4101 transitions. [2022-12-13 19:19:38,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4101 transitions. [2022-12-13 19:19:38,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:38,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4101 transitions. [2022-12-13 19:19:38,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 107.92105263157895) internal successors, (4101), 38 states have internal predecessors, (4101), 0 states have call successors, (0), 0 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 19:19:38,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 258.0) internal successors, (10062), 39 states have internal predecessors, (10062), 0 states have call successors, (0), 0 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 19:19:38,208 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 258.0) internal successors, (10062), 39 states have internal predecessors, (10062), 0 states have call successors, (0), 0 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 19:19:38,208 INFO L175 Difference]: Start difference. First operand has 206 places, 132 transitions, 1633 flow. Second operand 38 states and 4101 transitions. [2022-12-13 19:19:38,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 667 transitions, 8176 flow [2022-12-13 19:19:44,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 667 transitions, 8075 flow, removed 17 selfloop flow, removed 15 redundant places. [2022-12-13 19:19:44,491 INFO L231 Difference]: Finished difference. Result has 228 places, 142 transitions, 1776 flow [2022-12-13 19:19:44,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1776, PETRI_PLACES=228, PETRI_TRANSITIONS=142} [2022-12-13 19:19:44,491 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 192 predicate places. [2022-12-13 19:19:44,491 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 142 transitions, 1776 flow [2022-12-13 19:19:44,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 102.25) internal successors, (2454), 24 states have internal predecessors, (2454), 0 states have call successors, (0), 0 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 19:19:44,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:19:44,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:19:44,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (24)] Ended with exit code 0 [2022-12-13 19:19:44,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:19:44,693 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:19:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:19:44,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1504895746, now seen corresponding path program 1 times [2022-12-13 19:19:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:19:44,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941705594] [2022-12-13 19:19:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:19:44,696 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 19:19:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:19:44,699 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:19:44,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (25)] Waiting until timeout for monitored process [2022-12-13 19:19:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:19:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:19:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:19:44,982 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 19:19:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:19:45,079 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 19:19:45,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:19:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941705594] [2022-12-13 19:19:45,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941705594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:19:45,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:19:45,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 19:19:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178628643] [2022-12-13 19:19:45,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:19:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:19:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:19:45,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:19:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:19:45,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2022-12-13 19:19:45,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 142 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 19:19:45,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:19:45,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2022-12-13 19:19:45,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:19:56,391 INFO L130 PetriNetUnfolder]: 32145/52380 cut-off events. [2022-12-13 19:19:56,391 INFO L131 PetriNetUnfolder]: For 326835/327288 co-relation queries the response was YES. [2022-12-13 19:19:56,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305151 conditions, 52380 events. 32145/52380 cut-off events. For 326835/327288 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 397774 event pairs, 20095 based on Foata normal form. 516/52820 useless extension candidates. Maximal degree in co-relation 305068. Up to 46024 conditions per place. [2022-12-13 19:19:56,947 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 158 selfloop transitions, 22 changer transitions 0/185 dead transitions. [2022-12-13 19:19:56,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 185 transitions, 2525 flow [2022-12-13 19:19:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:19:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:19:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2022-12-13 19:19:56,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423449612403101 [2022-12-13 19:19:56,950 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2022-12-13 19:19:56,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2022-12-13 19:19:56,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:19:56,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2022-12-13 19:19:56,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 19:19:56,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:19:56,952 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:19:56,952 INFO L175 Difference]: Start difference. First operand has 228 places, 142 transitions, 1776 flow. Second operand 8 states and 913 transitions. [2022-12-13 19:19:56,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 185 transitions, 2525 flow [2022-12-13 19:20:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 185 transitions, 2190 flow, removed 57 selfloop flow, removed 33 redundant places. [2022-12-13 19:20:13,383 INFO L231 Difference]: Finished difference. Result has 199 places, 140 transitions, 1472 flow [2022-12-13 19:20:13,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=199, PETRI_TRANSITIONS=140} [2022-12-13 19:20:13,384 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 163 predicate places. [2022-12-13 19:20:13,384 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 140 transitions, 1472 flow [2022-12-13 19:20:13,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.8) internal successors, (1108), 10 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 19:20:13,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:13,384 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:13,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (25)] Ended with exit code 0 [2022-12-13 19:20:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:13,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:20:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1076557773, now seen corresponding path program 1 times [2022-12-13 19:20:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:20:13,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14774476] [2022-12-13 19:20:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:13,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 19:20:13,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:20:13,591 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:13,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (26)] Waiting until timeout for monitored process [2022-12-13 19:20:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 19:20:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:13,747 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 19:20:13,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:13,821 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 19:20:13,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:20:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14774476] [2022-12-13 19:20:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14774476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:13,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:20:13,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 19:20:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953558133] [2022-12-13 19:20:13,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:13,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 19:20:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:20:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 19:20:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:20:14,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2022-12-13 19:20:14,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 140 transitions, 1472 flow. Second operand has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 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 19:20:14,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:14,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2022-12-13 19:20:14,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:22,715 INFO L130 PetriNetUnfolder]: 28934/46824 cut-off events. [2022-12-13 19:20:22,716 INFO L131 PetriNetUnfolder]: For 192069/195334 co-relation queries the response was YES. [2022-12-13 19:20:22,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204164 conditions, 46824 events. 28934/46824 cut-off events. For 192069/195334 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 348915 event pairs, 18945 based on Foata normal form. 3779/50572 useless extension candidates. Maximal degree in co-relation 204090. Up to 43551 conditions per place. [2022-12-13 19:20:23,137 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 157 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2022-12-13 19:20:23,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 186 transitions, 2111 flow [2022-12-13 19:20:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:20:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 19:20:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2022-12-13 19:20:23,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4423449612403101 [2022-12-13 19:20:23,140 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2022-12-13 19:20:23,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2022-12-13 19:20:23,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:23,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2022-12-13 19:20:23,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 19:20:23,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:20:23,143 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 258.0) internal successors, (2322), 9 states have internal predecessors, (2322), 0 states have call successors, (0), 0 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 19:20:23,143 INFO L175 Difference]: Start difference. First operand has 199 places, 140 transitions, 1472 flow. Second operand 8 states and 913 transitions. [2022-12-13 19:20:23,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 186 transitions, 2111 flow [2022-12-13 19:20:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 186 transitions, 1998 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-12-13 19:20:31,998 INFO L231 Difference]: Finished difference. Result has 200 places, 140 transitions, 1459 flow [2022-12-13 19:20:31,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1459, PETRI_PLACES=200, PETRI_TRANSITIONS=140} [2022-12-13 19:20:31,999 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 164 predicate places. [2022-12-13 19:20:31,999 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 140 transitions, 1459 flow [2022-12-13 19:20:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.1) internal successors, (1101), 10 states have internal predecessors, (1101), 0 states have call successors, (0), 0 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 19:20:31,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:31,999 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:32,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (26)] Forceful destruction successful, exit code 0 [2022-12-13 19:20:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:32,200 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:20:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1943394609, now seen corresponding path program 1 times [2022-12-13 19:20:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:20:32,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063550132] [2022-12-13 19:20:32,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:20:32,203 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 19:20:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:20:32,206 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (27)] Waiting until timeout for monitored process [2022-12-13 19:20:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:20:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 19:20:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:20:32,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-13 19:20:32,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-13 19:20:32,546 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:20:32,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 46 [2022-12-13 19:20:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:20:32,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:20:32,881 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv3 32) c_~A~0.offset)) (.cse3 (bvadd (_ bv2 32) c_~A~0.offset)) (.cse4 (bvadd c_~A~0.offset (_ bv1 32)))) (and (forall ((v_ArrVal_641 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_641) c_~A~0.base))) (concat (concat (concat (select .cse1 .cse2) (select .cse1 .cse3)) (select .cse1 .cse4)) (select .cse1 c_~A~0.offset))))) (or (not (bvsle c_~counter~0 (bvadd (_ bv2147483647 32) .cse0))) (= (bvadd c_~counter~0 (bvneg .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_641 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse5 (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_641) c_~A~0.base))) (concat (concat (concat (select .cse6 .cse2) (select .cse6 .cse3)) (select .cse6 .cse4)) (select .cse6 c_~A~0.offset))))) (or (= (bvadd c_~counter~0 (bvneg .cse5)) (_ bv0 32)) (not (bvsge .cse5 (_ bv0 32)))))))) is different from false [2022-12-13 19:20:32,992 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 19:20:32,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 220 treesize of output 146 [2022-12-13 19:20:33,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:20:33,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 54 [2022-12-13 19:20:34,342 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 19:20:34,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 310 treesize of output 166 [2022-12-13 19:20:34,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:20:34,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 74 [2022-12-13 19:20:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:20:38,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:20:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063550132] [2022-12-13 19:20:38,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063550132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:20:38,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:20:38,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-12-13 19:20:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066720299] [2022-12-13 19:20:38,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:20:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 19:20:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:20:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 19:20:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=158, Unknown=1, NotChecked=26, Total=240 [2022-12-13 19:20:38,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 258 [2022-12-13 19:20:38,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 140 transitions, 1459 flow. Second operand has 16 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 0 states have call successors, (0), 0 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 19:20:38,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:20:38,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 258 [2022-12-13 19:20:38,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:20:49,929 INFO L130 PetriNetUnfolder]: 30890/50189 cut-off events. [2022-12-13 19:20:49,929 INFO L131 PetriNetUnfolder]: For 200151/200151 co-relation queries the response was YES. [2022-12-13 19:20:50,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217204 conditions, 50189 events. 30890/50189 cut-off events. For 200151/200151 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 373425 event pairs, 12075 based on Foata normal form. 2/50191 useless extension candidates. Maximal degree in co-relation 217129. Up to 48710 conditions per place. [2022-12-13 19:20:50,393 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 149 selfloop transitions, 46 changer transitions 5/200 dead transitions. [2022-12-13 19:20:50,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 200 transitions, 2294 flow [2022-12-13 19:20:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:20:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:20:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 630 transitions. [2022-12-13 19:20:50,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2022-12-13 19:20:50,396 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 630 transitions. [2022-12-13 19:20:50,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 630 transitions. [2022-12-13 19:20:50,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:20:50,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 630 transitions. [2022-12-13 19:20:50,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 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 19:20:50,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 258.0) internal successors, (2064), 8 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:20:50,398 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 258.0) internal successors, (2064), 8 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:20:50,398 INFO L175 Difference]: Start difference. First operand has 200 places, 140 transitions, 1459 flow. Second operand 7 states and 630 transitions. [2022-12-13 19:20:50,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 200 transitions, 2294 flow [2022-12-13 19:20:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 2275 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-13 19:20:59,746 INFO L231 Difference]: Finished difference. Result has 205 places, 167 transitions, 1905 flow [2022-12-13 19:20:59,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1905, PETRI_PLACES=205, PETRI_TRANSITIONS=167} [2022-12-13 19:20:59,747 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 169 predicate places. [2022-12-13 19:20:59,747 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 167 transitions, 1905 flow [2022-12-13 19:20:59,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 84.125) internal successors, (1346), 16 states have internal predecessors, (1346), 0 states have call successors, (0), 0 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 19:20:59,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:20:59,747 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:20:59,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (27)] Ended with exit code 0 [2022-12-13 19:20:59,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:59,948 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:20:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:20:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1843362985, now seen corresponding path program 2 times [2022-12-13 19:20:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:20:59,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438422325] [2022-12-13 19:20:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:20:59,951 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 19:20:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:20:59,955 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:20:59,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (28)] Waiting until timeout for monitored process [2022-12-13 19:21:00,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:21:00,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 19:21:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:00,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:21:00,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2022-12-13 19:21:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:00,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:00,606 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 19:21:00,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 320 treesize of output 123 [2022-12-13 19:21:14,887 WARN L233 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 376 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:21:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:15,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:21:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438422325] [2022-12-13 19:21:15,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438422325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:15,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:21:15,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 19:21:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269853585] [2022-12-13 19:21:15,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:21:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:21:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:21:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:21:15,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:21:15,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 167 transitions, 1905 flow. Second operand has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:15,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:15,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:21:15,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:26,028 INFO L130 PetriNetUnfolder]: 31269/50847 cut-off events. [2022-12-13 19:21:26,028 INFO L131 PetriNetUnfolder]: For 223806/223806 co-relation queries the response was YES. [2022-12-13 19:21:26,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227142 conditions, 50847 events. 31269/50847 cut-off events. For 223806/223806 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 379918 event pairs, 13689 based on Foata normal form. 2/50849 useless extension candidates. Maximal degree in co-relation 227063. Up to 49935 conditions per place. [2022-12-13 19:21:26,616 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 163 selfloop transitions, 49 changer transitions 4/216 dead transitions. [2022-12-13 19:21:26,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 216 transitions, 2867 flow [2022-12-13 19:21:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2022-12-13 19:21:26,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4560723514211886 [2022-12-13 19:21:26,620 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2022-12-13 19:21:26,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2022-12-13 19:21:26,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:26,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2022-12-13 19:21:26,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 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 19:21:26,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:21:26,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:21:26,625 INFO L175 Difference]: Start difference. First operand has 205 places, 167 transitions, 1905 flow. Second operand 6 states and 706 transitions. [2022-12-13 19:21:26,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 216 transitions, 2867 flow [2022-12-13 19:21:37,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 216 transitions, 2740 flow, removed 47 selfloop flow, removed 2 redundant places. [2022-12-13 19:21:37,552 INFO L231 Difference]: Finished difference. Result has 211 places, 199 transitions, 2427 flow [2022-12-13 19:21:37,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2427, PETRI_PLACES=211, PETRI_TRANSITIONS=199} [2022-12-13 19:21:37,553 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 175 predicate places. [2022-12-13 19:21:37,553 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 199 transitions, 2427 flow [2022-12-13 19:21:37,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:21:37,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:21:37,554 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:21:37,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (28)] Forceful destruction successful, exit code 0 [2022-12-13 19:21:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:21:37,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:21:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:21:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 186151709, now seen corresponding path program 3 times [2022-12-13 19:21:37,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:21:37,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206105955] [2022-12-13 19:21:37,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:21:37,758 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 19:21:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:21:37,760 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:21:37,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (29)] Waiting until timeout for monitored process [2022-12-13 19:21:37,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:21:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:21:37,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:21:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:21:38,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:21:38,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2022-12-13 19:21:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:38,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:21:38,596 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 19:21:38,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2022-12-13 19:21:46,229 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 166 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:21:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:21:46,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:21:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206105955] [2022-12-13 19:21:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206105955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:21:46,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:21:46,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 19:21:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402137438] [2022-12-13 19:21:46,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:21:46,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:21:46,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:21:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:21:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:21:47,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:21:47,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 199 transitions, 2427 flow. Second operand has 9 states, 9 states have (on average 112.77777777777777) internal successors, (1015), 9 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 19:21:47,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:21:47,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:21:47,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:21:57,999 INFO L130 PetriNetUnfolder]: 31496/51241 cut-off events. [2022-12-13 19:21:57,999 INFO L131 PetriNetUnfolder]: For 237314/237314 co-relation queries the response was YES. [2022-12-13 19:21:58,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232841 conditions, 51241 events. 31496/51241 cut-off events. For 237314/237314 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 383488 event pairs, 14251 based on Foata normal form. 2/51243 useless extension candidates. Maximal degree in co-relation 232759. Up to 50508 conditions per place. [2022-12-13 19:21:58,578 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 176 selfloop transitions, 53 changer transitions 5/234 dead transitions. [2022-12-13 19:21:58,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 234 transitions, 3208 flow [2022-12-13 19:21:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:21:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:21:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2022-12-13 19:21:58,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4560723514211886 [2022-12-13 19:21:58,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2022-12-13 19:21:58,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2022-12-13 19:21:58,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:21:58,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2022-12-13 19:21:58,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 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 19:21:58,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:21:58,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:21:58,582 INFO L175 Difference]: Start difference. First operand has 211 places, 199 transitions, 2427 flow. Second operand 6 states and 706 transitions. [2022-12-13 19:21:58,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 234 transitions, 3208 flow [2022-12-13 19:22:10,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 234 transitions, 3116 flow, removed 26 selfloop flow, removed 2 redundant places. [2022-12-13 19:22:10,541 INFO L231 Difference]: Finished difference. Result has 217 places, 216 transitions, 2773 flow [2022-12-13 19:22:10,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2773, PETRI_PLACES=217, PETRI_TRANSITIONS=216} [2022-12-13 19:22:10,541 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 181 predicate places. [2022-12-13 19:22:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 216 transitions, 2773 flow [2022-12-13 19:22:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.77777777777777) internal successors, (1015), 9 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 19:22:10,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:22:10,542 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:22:10,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (29)] Forceful destruction successful, exit code 0 [2022-12-13 19:22:10,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:22:10,743 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:22:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:22:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1654524863, now seen corresponding path program 4 times [2022-12-13 19:22:10,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:22:10,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488621754] [2022-12-13 19:22:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:22:10,746 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 19:22:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:22:10,749 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:22:10,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (30)] Waiting until timeout for monitored process [2022-12-13 19:22:10,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:22:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:22:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 19:22:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:22:11,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:22:11,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 46 [2022-12-13 19:22:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:22:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:22:11,700 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 19:22:11,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 320 treesize of output 123 [2022-12-13 19:22:25,707 WARN L233 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 384 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:22:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:22:25,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:22:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488621754] [2022-12-13 19:22:25,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488621754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:22:25,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:22:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 19:22:25,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667804610] [2022-12-13 19:22:25,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:22:25,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:22:25,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:22:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:22:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:22:27,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:22:27,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 216 transitions, 2773 flow. Second operand has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 19:22:27,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:22:27,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:22:27,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:22:38,714 INFO L130 PetriNetUnfolder]: 31658/51526 cut-off events. [2022-12-13 19:22:38,714 INFO L131 PetriNetUnfolder]: For 253339/253339 co-relation queries the response was YES. [2022-12-13 19:22:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236428 conditions, 51526 events. 31658/51526 cut-off events. For 253339/253339 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 386167 event pairs, 14175 based on Foata normal form. 2/51528 useless extension candidates. Maximal degree in co-relation 236343. Up to 50614 conditions per place. [2022-12-13 19:22:39,214 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 188 selfloop transitions, 50 changer transitions 6/244 dead transitions. [2022-12-13 19:22:39,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 244 transitions, 3511 flow [2022-12-13 19:22:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:22:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:22:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2022-12-13 19:22:39,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2022-12-13 19:22:39,217 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2022-12-13 19:22:39,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2022-12-13 19:22:39,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:22:39,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2022-12-13 19:22:39,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 0 states have call successors, (0), 0 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 19:22:39,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:22:39,219 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:22:39,219 INFO L175 Difference]: Start difference. First operand has 217 places, 216 transitions, 2773 flow. Second operand 6 states and 708 transitions. [2022-12-13 19:22:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 244 transitions, 3511 flow [2022-12-13 19:22:49,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 244 transitions, 3417 flow, removed 32 selfloop flow, removed 1 redundant places. [2022-12-13 19:22:49,745 INFO L231 Difference]: Finished difference. Result has 223 places, 223 transitions, 2971 flow [2022-12-13 19:22:49,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2971, PETRI_PLACES=223, PETRI_TRANSITIONS=223} [2022-12-13 19:22:49,746 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 187 predicate places. [2022-12-13 19:22:49,746 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 223 transitions, 2971 flow [2022-12-13 19:22:49,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 19:22:49,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:22:49,746 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:22:49,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (30)] Ended with exit code 0 [2022-12-13 19:22:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:22:49,947 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:22:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:22:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1707345393, now seen corresponding path program 5 times [2022-12-13 19:22:49,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:22:49,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536929976] [2022-12-13 19:22:49,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:22:49,950 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 19:22:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:22:49,952 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:22:49,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (31)] Waiting until timeout for monitored process [2022-12-13 19:22:50,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:22:50,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:22:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 19:22:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:22:50,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:22:50,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 69 [2022-12-13 19:22:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:22:50,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:22:51,644 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-13 19:22:51,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 124 [2022-12-13 19:23:08,917 WARN L233 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 376 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:23:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:23:09,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:23:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536929976] [2022-12-13 19:23:09,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536929976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:23:09,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:23:09,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2022-12-13 19:23:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248415112] [2022-12-13 19:23:09,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:23:09,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 19:23:09,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:23:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 19:23:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:23:11,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 258 [2022-12-13 19:23:11,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 223 transitions, 2971 flow. Second operand has 12 states, 12 states have (on average 110.83333333333333) internal successors, (1330), 12 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 19:23:11,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:23:11,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 258 [2022-12-13 19:23:11,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:23:22,437 INFO L130 PetriNetUnfolder]: 31874/51897 cut-off events. [2022-12-13 19:23:22,437 INFO L131 PetriNetUnfolder]: For 271300/271300 co-relation queries the response was YES. [2022-12-13 19:23:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241553 conditions, 51897 events. 31874/51897 cut-off events. For 271300/271300 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 389455 event pairs, 14254 based on Foata normal form. 2/51899 useless extension candidates. Maximal degree in co-relation 241464. Up to 51174 conditions per place. [2022-12-13 19:23:23,035 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 198 selfloop transitions, 48 changer transitions 6/252 dead transitions. [2022-12-13 19:23:23,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 252 transitions, 3780 flow [2022-12-13 19:23:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:23:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 19:23:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 802 transitions. [2022-12-13 19:23:23,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4440753045404208 [2022-12-13 19:23:23,038 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 802 transitions. [2022-12-13 19:23:23,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 802 transitions. [2022-12-13 19:23:23,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:23,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 802 transitions. [2022-12-13 19:23:23,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 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 19:23:23,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 258.0) internal successors, (2064), 8 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:23:23,040 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 258.0) internal successors, (2064), 8 states have internal predecessors, (2064), 0 states have call successors, (0), 0 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 19:23:23,041 INFO L175 Difference]: Start difference. First operand has 223 places, 223 transitions, 2971 flow. Second operand 7 states and 802 transitions. [2022-12-13 19:23:23,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 252 transitions, 3780 flow [2022-12-13 19:23:33,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 252 transitions, 3673 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-12-13 19:23:33,268 INFO L231 Difference]: Finished difference. Result has 227 places, 234 transitions, 3213 flow [2022-12-13 19:23:33,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3213, PETRI_PLACES=227, PETRI_TRANSITIONS=234} [2022-12-13 19:23:33,269 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 191 predicate places. [2022-12-13 19:23:33,269 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 234 transitions, 3213 flow [2022-12-13 19:23:33,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.83333333333333) internal successors, (1330), 12 states have internal predecessors, (1330), 0 states have call successors, (0), 0 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 19:23:33,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:23:33,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:23:33,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (31)] Ended with exit code 0 [2022-12-13 19:23:33,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:23:33,471 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:23:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:23:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1790350621, now seen corresponding path program 6 times [2022-12-13 19:23:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:23:33,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649458863] [2022-12-13 19:23:33,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:23:33,473 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 19:23:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:23:33,476 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:23:33,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (32)] Waiting until timeout for monitored process [2022-12-13 19:23:33,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 19:23:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:23:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 19:23:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:23:34,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:23:34,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 40 [2022-12-13 19:23:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:23:34,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:23:34,672 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-12-13 19:23:34,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 170 treesize of output 83 [2022-12-13 19:23:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:23:36,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:23:36,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649458863] [2022-12-13 19:23:36,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649458863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:23:36,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:23:36,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 19:23:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151728] [2022-12-13 19:23:36,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:23:36,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:23:36,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:23:36,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:23:36,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:23:38,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 258 [2022-12-13 19:23:38,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 234 transitions, 3213 flow. Second operand has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 19:23:38,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:23:38,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 258 [2022-12-13 19:23:38,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:23:49,362 INFO L130 PetriNetUnfolder]: 31861/51863 cut-off events. [2022-12-13 19:23:49,362 INFO L131 PetriNetUnfolder]: For 287097/287097 co-relation queries the response was YES. [2022-12-13 19:23:49,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243534 conditions, 51863 events. 31861/51863 cut-off events. For 287097/287097 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 388878 event pairs, 14278 based on Foata normal form. 2/51865 useless extension candidates. Maximal degree in co-relation 243442. Up to 50944 conditions per place. [2022-12-13 19:23:49,980 INFO L137 encePairwiseOnDemand]: 252/258 looper letters, 197 selfloop transitions, 63 changer transitions 9/269 dead transitions. [2022-12-13 19:23:49,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 269 transitions, 4198 flow [2022-12-13 19:23:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:23:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:23:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2022-12-13 19:23:49,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4560723514211886 [2022-12-13 19:23:49,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2022-12-13 19:23:49,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2022-12-13 19:23:49,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:23:49,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2022-12-13 19:23:49,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 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 19:23:49,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:23:49,985 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 258.0) internal successors, (1806), 7 states have internal predecessors, (1806), 0 states have call successors, (0), 0 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 19:23:49,985 INFO L175 Difference]: Start difference. First operand has 227 places, 234 transitions, 3213 flow. Second operand 6 states and 706 transitions. [2022-12-13 19:23:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 269 transitions, 4198 flow [2022-12-13 19:24:00,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 269 transitions, 4027 flow, removed 69 selfloop flow, removed 2 redundant places. [2022-12-13 19:24:00,409 INFO L231 Difference]: Finished difference. Result has 232 places, 248 transitions, 3588 flow [2022-12-13 19:24:00,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3588, PETRI_PLACES=232, PETRI_TRANSITIONS=248} [2022-12-13 19:24:00,409 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 196 predicate places. [2022-12-13 19:24:00,409 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 248 transitions, 3588 flow [2022-12-13 19:24:00,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 19:24:00,410 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:24:00,410 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 1, 1, 1, 1, 1] [2022-12-13 19:24:00,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (32)] Ended with exit code 0 [2022-12-13 19:24:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:24:00,611 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:24:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:24:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1897426061, now seen corresponding path program 5 times [2022-12-13 19:24:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:24:00,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970338380] [2022-12-13 19:24:00,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:24:00,614 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 19:24:00,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:24:00,616 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:24:00,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (33)] Waiting until timeout for monitored process [2022-12-13 19:24:00,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 19:24:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:24:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:24:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:24:01,141 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:24:01,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:24:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 19:24:02,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:24:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:24:08,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:24:08,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970338380] [2022-12-13 19:24:08,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970338380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:24:08,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:24:08,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2022-12-13 19:24:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026074418] [2022-12-13 19:24:08,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:24:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 19:24:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:24:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 19:24:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-12-13 19:24:56,549 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 258 [2022-12-13 19:24:56,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 248 transitions, 3588 flow. Second operand has 31 states, 31 states have (on average 106.12903225806451) internal successors, (3290), 31 states have internal predecessors, (3290), 0 states have call successors, (0), 0 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 19:24:56,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:24:56,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 258 [2022-12-13 19:24:56,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:25:25,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 19:25:51,721 INFO L130 PetriNetUnfolder]: 30982/50809 cut-off events. [2022-12-13 19:25:51,721 INFO L131 PetriNetUnfolder]: For 317932/318990 co-relation queries the response was YES. [2022-12-13 19:25:52,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240643 conditions, 50809 events. 30982/50809 cut-off events. For 317932/318990 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 388638 event pairs, 15885 based on Foata normal form. 1140/51922 useless extension candidates. Maximal degree in co-relation 240546. Up to 37815 conditions per place. [2022-12-13 19:25:52,351 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 547 selfloop transitions, 123 changer transitions 0/682 dead transitions. [2022-12-13 19:25:52,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 682 transitions, 8089 flow [2022-12-13 19:25:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 19:25:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 19:25:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3616 transitions. [2022-12-13 19:25:52,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2022-12-13 19:25:52,359 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3616 transitions. [2022-12-13 19:25:52,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3616 transitions. [2022-12-13 19:25:52,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:25:52,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3616 transitions. [2022-12-13 19:25:52,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 113.0) internal successors, (3616), 32 states have internal predecessors, (3616), 0 states have call successors, (0), 0 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 19:25:52,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 0 states have call successors, (0), 0 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 19:25:52,368 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 258.0) internal successors, (8514), 33 states have internal predecessors, (8514), 0 states have call successors, (0), 0 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 19:25:52,368 INFO L175 Difference]: Start difference. First operand has 232 places, 248 transitions, 3588 flow. Second operand 32 states and 3616 transitions. [2022-12-13 19:25:52,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 682 transitions, 8089 flow [2022-12-13 19:26:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 682 transitions, 7767 flow, removed 118 selfloop flow, removed 5 redundant places. [2022-12-13 19:26:01,262 INFO L231 Difference]: Finished difference. Result has 259 places, 272 transitions, 4173 flow [2022-12-13 19:26:01,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4173, PETRI_PLACES=259, PETRI_TRANSITIONS=272} [2022-12-13 19:26:01,262 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 223 predicate places. [2022-12-13 19:26:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 272 transitions, 4173 flow [2022-12-13 19:26:01,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 106.12903225806451) internal successors, (3290), 31 states have internal predecessors, (3290), 0 states have call successors, (0), 0 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 19:26:01,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:26:01,263 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:26:01,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (33)] Forceful destruction successful, exit code 0 [2022-12-13 19:26:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:26:01,464 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:26:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:26:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash -736956671, now seen corresponding path program 7 times [2022-12-13 19:26:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:26:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228178026] [2022-12-13 19:26:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:26:01,466 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 19:26:01,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:26:01,469 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:26:01,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (34)] Waiting until timeout for monitored process [2022-12-13 19:26:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:26:01,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 19:26:01,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:26:01,805 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:26:01,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:26:02,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 19:26:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:26:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:26:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 19:26:03,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:26:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228178026] [2022-12-13 19:26:03,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228178026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:26:03,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:26:03,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 19:26:03,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186905453] [2022-12-13 19:26:03,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:26:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:26:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:26:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:26:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:26:07,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 258 [2022-12-13 19:26:07,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 272 transitions, 4173 flow. Second operand has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 19:26:07,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:26:07,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 258 [2022-12-13 19:26:07,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:26:19,915 INFO L130 PetriNetUnfolder]: 28728/46984 cut-off events. [2022-12-13 19:26:19,915 INFO L131 PetriNetUnfolder]: For 306441/307144 co-relation queries the response was YES. [2022-12-13 19:26:20,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226583 conditions, 46984 events. 28728/46984 cut-off events. For 306441/307144 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 356628 event pairs, 16411 based on Foata normal form. 1552/48481 useless extension candidates. Maximal degree in co-relation 226475. Up to 41206 conditions per place. [2022-12-13 19:26:20,436 INFO L137 encePairwiseOnDemand]: 251/258 looper letters, 210 selfloop transitions, 117 changer transitions 0/339 dead transitions. [2022-12-13 19:26:20,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 339 transitions, 5229 flow [2022-12-13 19:26:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 19:26:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 19:26:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1185 transitions. [2022-12-13 19:26:20,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4175475687103594 [2022-12-13 19:26:20,439 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1185 transitions. [2022-12-13 19:26:20,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1185 transitions. [2022-12-13 19:26:20,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:26:20,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1185 transitions. [2022-12-13 19:26:20,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 107.72727272727273) internal successors, (1185), 11 states have internal predecessors, (1185), 0 states have call successors, (0), 0 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 19:26:20,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:20,443 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:26:20,443 INFO L175 Difference]: Start difference. First operand has 259 places, 272 transitions, 4173 flow. Second operand 11 states and 1185 transitions. [2022-12-13 19:26:20,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 339 transitions, 5229 flow [2022-12-13 19:26:25,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 339 transitions, 4798 flow, removed 142 selfloop flow, removed 19 redundant places. [2022-12-13 19:26:25,989 INFO L231 Difference]: Finished difference. Result has 252 places, 272 transitions, 4088 flow [2022-12-13 19:26:25,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4088, PETRI_PLACES=252, PETRI_TRANSITIONS=272} [2022-12-13 19:26:25,990 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 216 predicate places. [2022-12-13 19:26:25,990 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 272 transitions, 4088 flow [2022-12-13 19:26:25,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.14285714285714) internal successors, (1458), 14 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 19:26:25,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:26:25,990 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 4, 1, 1, 1, 1, 1] [2022-12-13 19:26:25,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (34)] Ended with exit code 0 [2022-12-13 19:26:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:26:26,192 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:26:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:26:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 911487420, now seen corresponding path program 6 times [2022-12-13 19:26:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:26:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087181662] [2022-12-13 19:26:26,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:26:26,194 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 19:26:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:26:26,197 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:26:26,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (35)] Waiting until timeout for monitored process [2022-12-13 19:26:26,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 19:26:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:26:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:26:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:26:26,856 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:26:26,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:26:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:26:28,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:26:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:26:37,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:26:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087181662] [2022-12-13 19:26:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087181662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:26:37,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:26:37,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-12-13 19:26:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006363594] [2022-12-13 19:26:37,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:26:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 19:26:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:26:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 19:26:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:27:00,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 258 [2022-12-13 19:27:00,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 272 transitions, 4088 flow. Second operand has 22 states, 22 states have (on average 105.36363636363636) internal successors, (2318), 22 states have internal predecessors, (2318), 0 states have call successors, (0), 0 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 19:27:00,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:27:00,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 258 [2022-12-13 19:27:00,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:27:10,153 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 93 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:27:20,367 WARN L233 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 101 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:27:34,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:27:44,817 WARN L233 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 91 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:27:46,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:01,173 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 103 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 19:28:05,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:09,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:26,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:30,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:32,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:36,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:38,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:40,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 19:28:42,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 19:29:10,464 INFO L130 PetriNetUnfolder]: 25910/42431 cut-off events. [2022-12-13 19:29:10,464 INFO L131 PetriNetUnfolder]: For 289979/290456 co-relation queries the response was YES. [2022-12-13 19:29:10,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203942 conditions, 42431 events. 25910/42431 cut-off events. For 289979/290456 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 318913 event pairs, 15592 based on Foata normal form. 465/42868 useless extension candidates. Maximal degree in co-relation 203837. Up to 39100 conditions per place. [2022-12-13 19:29:10,910 INFO L137 encePairwiseOnDemand]: 250/258 looper letters, 409 selfloop transitions, 74 changer transitions 0/495 dead transitions. [2022-12-13 19:29:10,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 495 transitions, 6399 flow [2022-12-13 19:29:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:29:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 19:29:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2441 transitions. [2022-12-13 19:29:10,916 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43005637773079636 [2022-12-13 19:29:10,916 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2441 transitions. [2022-12-13 19:29:10,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2441 transitions. [2022-12-13 19:29:10,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:29:10,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2441 transitions. [2022-12-13 19:29:10,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 110.95454545454545) internal successors, (2441), 22 states have internal predecessors, (2441), 0 states have call successors, (0), 0 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 19:29:10,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:29:10,922 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 258.0) internal successors, (5934), 23 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 19:29:10,922 INFO L175 Difference]: Start difference. First operand has 252 places, 272 transitions, 4088 flow. Second operand 22 states and 2441 transitions. [2022-12-13 19:29:10,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 495 transitions, 6399 flow [2022-12-13 19:29:15,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 495 transitions, 6109 flow, removed 5 selfloop flow, removed 12 redundant places. [2022-12-13 19:29:15,095 INFO L231 Difference]: Finished difference. Result has 263 places, 274 transitions, 4009 flow [2022-12-13 19:29:15,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4009, PETRI_PLACES=263, PETRI_TRANSITIONS=274} [2022-12-13 19:29:15,096 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 227 predicate places. [2022-12-13 19:29:15,096 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 274 transitions, 4009 flow [2022-12-13 19:29:15,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 105.36363636363636) internal successors, (2318), 22 states have internal predecessors, (2318), 0 states have call successors, (0), 0 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 19:29:15,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:29:15,096 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:29:15,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (35)] Ended with exit code 0 [2022-12-13 19:29:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:29:15,297 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-13 19:29:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:29:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1892642527, now seen corresponding path program 8 times [2022-12-13 19:29:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 19:29:15,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85647552] [2022-12-13 19:29:15,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:29:15,300 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 19:29:15,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 19:29:15,303 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 19:29:15,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14795967-3aee-45b0-a6c2-ff1ef70e2a7d/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 (36)] Waiting until timeout for monitored process [2022-12-13 19:29:15,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:29:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:29:15,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 19:29:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:29:15,669 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-13 19:29:15,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-13 19:29:16,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-12-13 19:29:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:29:16,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:29:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:29:18,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 19:29:18,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85647552] [2022-12-13 19:29:18,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85647552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:29:18,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:29:18,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 19:29:18,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649549254] [2022-12-13 19:29:18,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:29:18,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 19:29:18,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 19:29:18,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 19:29:18,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-12-13 19:29:25,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 258 [2022-12-13 19:29:25,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 274 transitions, 4009 flow. Second operand has 18 states, 18 states have (on average 103.83333333333333) internal successors, (1869), 18 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 19:29:25,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:29:25,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 258 [2022-12-13 19:29:25,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand