./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R --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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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-38b53e6 [2022-11-25 17:31:25,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:31:25,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:31:25,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:31:25,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:31:25,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:31:25,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:31:25,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:31:25,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:31:25,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:31:25,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:31:25,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:31:25,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:31:25,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:31:25,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:31:25,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:31:25,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:31:25,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:31:25,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:31:25,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:31:25,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:31:25,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:31:25,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:31:25,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:31:25,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:31:25,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:31:25,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:31:25,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:31:25,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:31:25,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:31:25,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:31:25,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:31:25,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:31:25,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:31:25,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:31:25,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:31:25,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:31:25,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:31:25,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:31:25,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:31:25,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:31:25,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:31:25,668 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:31:25,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:31:25,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:31:25,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:31:25,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:31:25,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:31:25,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:31:25,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:31:25,672 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:31:25,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:31:25,673 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:31:25,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:31:25,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:31:25,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:31:25,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:31:25,675 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:31:25,675 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:31:25,675 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:31:25,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:31:25,676 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:31:25,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:31:25,677 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:31:25,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:31:25,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:31:25,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:31:25,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:25,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:31:25,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:31:25,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:31:25,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:31:25,680 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:31:25,680 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:31:25,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:31:25,681 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-25 17:31:26,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:31:26,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:31:26,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:31:26,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:31:26,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:31:26,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:31:29,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:31:29,318 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:31:29,318 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:31:29,328 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/bf65319c6/68f29a1ce73f4f7db9a236208e6635b4/FLAGa158bbb0d [2022-11-25 17:31:29,348 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/bf65319c6/68f29a1ce73f4f7db9a236208e6635b4 [2022-11-25 17:31:29,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:31:29,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:31:29,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:29,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:31:29,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:31:29,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:29" (1/1) ... [2022-11-25 17:31:29,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265b9adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:29, skipping insertion in model container [2022-11-25 17:31:29,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:29" (1/1) ... [2022-11-25 17:31:29,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:31:29,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:31:29,698 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:31:29,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:29,728 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 17:31:29,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f2e83ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:29, skipping insertion in model container [2022-11-25 17:31:29,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:29,729 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:31:29,731 INFO L158 Benchmark]: Toolchain (without parser) took 378.53ms. Allocated memory is still 159.4MB. Free memory was 114.8MB in the beginning and 104.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:31:29,732 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:31:29,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.91ms. Allocated memory is still 159.4MB. Free memory was 114.8MB in the beginning and 104.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:31:29,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 103.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.91ms. Allocated memory is still 159.4MB. Free memory was 114.8MB in the beginning and 104.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R --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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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-38b53e6 [2022-11-25 17:31:32,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:31:32,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:31:32,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:31:32,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:31:32,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:31:32,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:31:32,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:31:32,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:31:32,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:31:32,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:31:32,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:31:32,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:31:32,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:31:32,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:31:32,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:31:32,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:31:32,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:31:32,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:31:32,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:31:32,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:31:32,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:31:32,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:31:32,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:31:32,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:31:32,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:31:32,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:31:32,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:31:32,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:31:32,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:31:32,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:31:32,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:31:32,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:31:32,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:31:32,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:31:32,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:31:32,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:31:32,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:31:32,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:31:32,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:31:32,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:31:32,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:31:32,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:31:32,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:31:32,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:31:32,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:31:32,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:31:32,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:31:32,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:31:32,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:31:32,134 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:31:32,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:31:32,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:31:32,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:31:32,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:31:32,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:31:32,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:31:32,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:31:32,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:31:32,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:31:32,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:31:32,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:31:32,137 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:31:32,137 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:31:32,138 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:31:32,138 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:31:32,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:31:32,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:31:32,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:31:32,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:32,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:31:32,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:31:32,149 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:31:32,149 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:31:32,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:31:32,150 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:31:32,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:31:32,150 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:31:32,150 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-25 17:31:32,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:31:32,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:31:32,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:31:32,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:31:32,591 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:31:32,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:31:35,672 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:31:35,915 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:31:35,916 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 17:31:35,925 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/12aae6605/b96212ce51054549bc9752b17b48c658/FLAGaad4b4944 [2022-11-25 17:31:35,940 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/data/12aae6605/b96212ce51054549bc9752b17b48c658 [2022-11-25 17:31:35,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:31:35,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:31:35,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:35,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:31:35,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:31:35,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:35" (1/1) ... [2022-11-25 17:31:35,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaa733e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:35, skipping insertion in model container [2022-11-25 17:31:35,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:31:35" (1/1) ... [2022-11-25 17:31:35,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:31:36,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:31:36,197 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:31:36,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:36,234 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:31:36,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:31:36,265 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:31:36,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:36,276 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:31:36,325 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_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 17:31:36,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:31:36,375 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:31:36,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36 WrapperNode [2022-11-25 17:31:36,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:31:36,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:36,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:31:36,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:31:36,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,470 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 278 [2022-11-25 17:31:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:31:36,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:31:36,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:31:36,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:31:36,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,551 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:31:36,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:31:36,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:31:36,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:31:36,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (1/1) ... [2022-11-25 17:31:36,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:31:36,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:36,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:31:36,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:31:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:31:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:31:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:31:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:31:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:31:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:31:36,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:31:36,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:31:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:31:36,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:31:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:31:36,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:31:36,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:31:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:31:36,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:31:36,657 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:31:36,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:31:36,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:31:37,716 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:31:37,729 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:31:37,730 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:31:37,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:37 BoogieIcfgContainer [2022-11-25 17:31:37,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:31:37,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:31:37,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:31:37,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:31:37,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:31:35" (1/3) ... [2022-11-25 17:31:37,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3969b2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:37, skipping insertion in model container [2022-11-25 17:31:37,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:31:36" (2/3) ... [2022-11-25 17:31:37,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3969b2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:31:37, skipping insertion in model container [2022-11-25 17:31:37,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:31:37" (3/3) ... [2022-11-25 17:31:37,757 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-11-25 17:31:37,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:31:37,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-25 17:31:37,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:31:37,991 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:31:38,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 784 flow [2022-11-25 17:31:38,284 INFO L130 PetriNetUnfolder]: 26/377 cut-off events. [2022-11-25 17:31:38,284 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:31:38,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 377 events. 26/377 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 994 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 269. Up to 2 conditions per place. [2022-11-25 17:31:38,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 380 transitions, 784 flow [2022-11-25 17:31:38,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 372 transitions, 762 flow [2022-11-25 17:31:38,315 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:31:38,333 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 372 transitions, 762 flow [2022-11-25 17:31:38,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 372 transitions, 762 flow [2022-11-25 17:31:38,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 372 transitions, 762 flow [2022-11-25 17:31:38,441 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-11-25 17:31:38,441 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:31:38,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1001 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 269. Up to 2 conditions per place. [2022-11-25 17:31:38,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 37914 [2022-11-25 17:32:19,759 INFO L134 LiptonReduction]: Checked pairs total: 34345 [2022-11-25 17:32:19,760 INFO L136 LiptonReduction]: Total number of compositions: 438 [2022-11-25 17:32:19,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:32:19,783 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;@2f813b2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:32:19,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-25 17:32:19,786 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 17:32:19,786 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:32:19,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:19,787 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:32:19,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 49515, now seen corresponding path program 1 times [2022-11-25 17:32:19,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:19,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149577178] [2022-11-25 17:32:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:19,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:19,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:19,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:19,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 17:32:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:32:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:20,158 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:32:20,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:32:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:20,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:20,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149577178] [2022-11-25 17:32:20,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149577178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:20,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:20,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894995232] [2022-11-25 17:32:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:20,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:20,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 818 [2022-11-25 17:32:20,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:20,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:20,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 818 [2022-11-25 17:32:20,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:21,159 INFO L130 PetriNetUnfolder]: 1817/2564 cut-off events. [2022-11-25 17:32:21,159 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-11-25 17:32:21,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5226 conditions, 2564 events. 1817/2564 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10282 event pairs, 1428 based on Foata normal form. 0/1026 useless extension candidates. Maximal degree in co-relation 4490. Up to 2564 conditions per place. [2022-11-25 17:32:21,175 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2022-11-25 17:32:21,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 190 flow [2022-11-25 17:32:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1086 transitions. [2022-11-25 17:32:21,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44254278728606355 [2022-11-25 17:32:21,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1086 transitions. [2022-11-25 17:32:21,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1086 transitions. [2022-11-25 17:32:21,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:21,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1086 transitions. [2022-11-25 17:32:21,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.0) internal successors, (1086), 3 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:21,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:21,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:21,223 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 1086 transitions. [2022-11-25 17:32:21,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 190 flow [2022-11-25 17:32:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:32:21,230 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2022-11-25 17:32:21,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2022-11-25 17:32:21,236 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2022-11-25 17:32:21,236 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2022-11-25 17:32:21,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:21,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:21,237 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:32:21,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:21,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 49737, now seen corresponding path program 1 times [2022-11-25 17:32:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412032037] [2022-11-25 17:32:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:21,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:21,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 17:32:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:32:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:21,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:21,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412032037] [2022-11-25 17:32:21,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412032037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:21,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:21,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:21,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742005777] [2022-11-25 17:32:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:21,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:21,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 818 [2022-11-25 17:32:21,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:21,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:21,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 818 [2022-11-25 17:32:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:22,378 INFO L130 PetriNetUnfolder]: 1817/2566 cut-off events. [2022-11-25 17:32:22,379 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:32:22,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5167 conditions, 2566 events. 1817/2566 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10285 event pairs, 1428 based on Foata normal form. 0/1027 useless extension candidates. Maximal degree in co-relation 5161. Up to 2565 conditions per place. [2022-11-25 17:32:22,394 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 43 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-11-25 17:32:22,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 188 flow [2022-11-25 17:32:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1098 transitions. [2022-11-25 17:32:22,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474327628361858 [2022-11-25 17:32:22,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1098 transitions. [2022-11-25 17:32:22,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1098 transitions. [2022-11-25 17:32:22,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:22,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1098 transitions. [2022-11-25 17:32:22,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:22,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:22,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:22,410 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 1098 transitions. [2022-11-25 17:32:22,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 188 flow [2022-11-25 17:32:22,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:22,421 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 109 flow [2022-11-25 17:32:22,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-11-25 17:32:22,422 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2022-11-25 17:32:22,422 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 109 flow [2022-11-25 17:32:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:22,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:22,423 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:32:22,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:22,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:22,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 49516, now seen corresponding path program 1 times [2022-11-25 17:32:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679190643] [2022-11-25 17:32:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:22,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:22,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 17:32:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:32:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:22,862 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:22,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:22,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:22,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679190643] [2022-11-25 17:32:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [679190643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:22,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439903395] [2022-11-25 17:32:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:23,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 818 [2022-11-25 17:32:23,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:23,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:23,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 818 [2022-11-25 17:32:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:23,851 INFO L130 PetriNetUnfolder]: 1817/2565 cut-off events. [2022-11-25 17:32:23,851 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:32:23,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 2565 events. 1817/2565 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10367 event pairs, 1428 based on Foata normal form. 1/1029 useless extension candidates. Maximal degree in co-relation 5165. Up to 2565 conditions per place. [2022-11-25 17:32:23,865 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 42 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-11-25 17:32:23,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 197 flow [2022-11-25 17:32:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1083 transitions. [2022-11-25 17:32:23,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.441320293398533 [2022-11-25 17:32:23,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1083 transitions. [2022-11-25 17:32:23,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1083 transitions. [2022-11-25 17:32:23,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:23,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1083 transitions. [2022-11-25 17:32:23,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:23,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:23,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:23,881 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 109 flow. Second operand 3 states and 1083 transitions. [2022-11-25 17:32:23,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 197 flow [2022-11-25 17:32:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 193 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:23,884 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 113 flow [2022-11-25 17:32:23,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2022-11-25 17:32:23,886 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-11-25 17:32:23,886 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 113 flow [2022-11-25 17:32:23,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:23,888 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:23,891 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:32:23,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:24,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1541612, now seen corresponding path program 1 times [2022-11-25 17:32:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375426629] [2022-11-25 17:32:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:24,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:24,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:24,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:24,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 17:32:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:32:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:24,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:24,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:24,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375426629] [2022-11-25 17:32:24,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375426629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:24,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:24,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:32:24,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933930497] [2022-11-25 17:32:24,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:32:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:24,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:32:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:32:24,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 818 [2022-11-25 17:32:24,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:24,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:24,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 818 [2022-11-25 17:32:24,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:25,310 INFO L130 PetriNetUnfolder]: 1818/2569 cut-off events. [2022-11-25 17:32:25,311 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:32:25,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 2569 events. 1818/2569 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10370 event pairs, 1428 based on Foata normal form. 0/1032 useless extension candidates. Maximal degree in co-relation 5178. Up to 2564 conditions per place. [2022-11-25 17:32:25,328 INFO L137 encePairwiseOnDemand]: 812/818 looper letters, 43 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2022-11-25 17:32:25,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 225 flow [2022-11-25 17:32:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1794 transitions. [2022-11-25 17:32:25,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4386308068459658 [2022-11-25 17:32:25,336 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1794 transitions. [2022-11-25 17:32:25,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1794 transitions. [2022-11-25 17:32:25,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:25,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1794 transitions. [2022-11-25 17:32:25,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 358.8) internal successors, (1794), 5 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:25,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:25,354 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:25,354 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 113 flow. Second operand 5 states and 1794 transitions. [2022-11-25 17:32:25,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 225 flow [2022-11-25 17:32:25,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:32:25,357 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 155 flow [2022-11-25 17:32:25,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=155, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2022-11-25 17:32:25,358 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-25 17:32:25,358 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 155 flow [2022-11-25 17:32:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:25,360 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:25,360 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:32:25,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:25,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1541391, now seen corresponding path program 1 times [2022-11-25 17:32:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345158340] [2022-11-25 17:32:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:25,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:25,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:25,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 17:32:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:32:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:25,802 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:25,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:25,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:26,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:26,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345158340] [2022-11-25 17:32:26,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345158340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:26,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:26,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 17:32:26,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939481586] [2022-11-25 17:32:26,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:26,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:32:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:32:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:32:26,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 818 [2022-11-25 17:32:26,943 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 345.0) internal successors, (2070), 6 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:26,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:26,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 818 [2022-11-25 17:32:26,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:28,049 INFO L130 PetriNetUnfolder]: 1817/2567 cut-off events. [2022-11-25 17:32:28,049 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:32:28,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5198 conditions, 2567 events. 1817/2567 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10350 event pairs, 1428 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5185. Up to 2565 conditions per place. [2022-11-25 17:32:28,078 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-11-25 17:32:28,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 241 flow [2022-11-25 17:32:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1768 transitions. [2022-11-25 17:32:28,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4322738386308069 [2022-11-25 17:32:28,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1768 transitions. [2022-11-25 17:32:28,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1768 transitions. [2022-11-25 17:32:28,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:28,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1768 transitions. [2022-11-25 17:32:28,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 353.6) internal successors, (1768), 5 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:28,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:28,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:28,102 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 155 flow. Second operand 5 states and 1768 transitions. [2022-11-25 17:32:28,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 241 flow [2022-11-25 17:32:28,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 226 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:32:28,107 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 142 flow [2022-11-25 17:32:28,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2022-11-25 17:32:28,110 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2022-11-25 17:32:28,110 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 142 flow [2022-11-25 17:32:28,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 345.0) internal successors, (2070), 6 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:28,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:28,111 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-11-25 17:32:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:28,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1481481391, now seen corresponding path program 2 times [2022-11-25 17:32:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572103857] [2022-11-25 17:32:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:28,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:28,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:28,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 17:32:28,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:28,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:32:28,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:28,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 17:32:28,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 17:32:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:28,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:32:29,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:29,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572103857] [2022-11-25 17:32:29,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572103857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:29,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:29,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:32:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618350138] [2022-11-25 17:32:29,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:29,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:32:29,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:32:29,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:32:32,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 818 [2022-11-25 17:32:32,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 342.0) internal successors, (3420), 10 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:32,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:32,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 818 [2022-11-25 17:32:32,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:32,789 INFO L130 PetriNetUnfolder]: 1816/2565 cut-off events. [2022-11-25 17:32:32,790 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-25 17:32:32,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 2565 events. 1816/2565 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10346 event pairs, 1428 based on Foata normal form. 2/1031 useless extension candidates. Maximal degree in co-relation 5175. Up to 2562 conditions per place. [2022-11-25 17:32:32,804 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 40 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2022-11-25 17:32:32,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 219 flow [2022-11-25 17:32:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:32:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:32:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2092 transitions. [2022-11-25 17:32:32,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4262428687856561 [2022-11-25 17:32:32,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2092 transitions. [2022-11-25 17:32:32,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2092 transitions. [2022-11-25 17:32:32,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:32,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2092 transitions. [2022-11-25 17:32:32,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 348.6666666666667) internal successors, (2092), 6 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:32,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 818.0) internal successors, (5726), 7 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:32,826 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 818.0) internal successors, (5726), 7 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:32,826 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 142 flow. Second operand 6 states and 2092 transitions. [2022-11-25 17:32:32,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 219 flow [2022-11-25 17:32:32,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 207 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-25 17:32:32,830 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 127 flow [2022-11-25 17:32:32,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-11-25 17:32:32,833 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-25 17:32:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 127 flow [2022-11-25 17:32:32,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 342.0) internal successors, (3420), 10 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:32,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:32,836 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-11-25 17:32:32,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:33,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:33,054 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1481481612, now seen corresponding path program 2 times [2022-11-25 17:32:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34257929] [2022-11-25 17:32:33,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:33,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:33,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:33,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:33,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 17:32:33,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:32:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:33,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:32:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:33,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:33,273 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-25 17:32:33,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-25 17:32:33,306 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 17:32:33,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 17:32:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:33,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:33,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:33,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34257929] [2022-11-25 17:32:33,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34257929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:33,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:33,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795054778] [2022-11-25 17:32:33,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:33,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:33,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 818 [2022-11-25 17:32:33,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:33,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:33,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 818 [2022-11-25 17:32:33,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:34,259 INFO L130 PetriNetUnfolder]: 1441/2064 cut-off events. [2022-11-25 17:32:34,259 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:32:34,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 2064 events. 1441/2064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8110 event pairs, 1128 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 4168. Up to 2064 conditions per place. [2022-11-25 17:32:34,274 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 17:32:34,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 201 flow [2022-11-25 17:32:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2022-11-25 17:32:34,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4400977995110024 [2022-11-25 17:32:34,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2022-11-25 17:32:34,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2022-11-25 17:32:34,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:34,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2022-11-25 17:32:34,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:34,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:34,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:34,303 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 127 flow. Second operand 3 states and 1080 transitions. [2022-11-25 17:32:34,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 201 flow [2022-11-25 17:32:34,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 194 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:32:34,306 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 112 flow [2022-11-25 17:32:34,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2022-11-25 17:32:34,307 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2022-11-25 17:32:34,308 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 112 flow [2022-11-25 17:32:34,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:34,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:34,309 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1] [2022-11-25 17:32:34,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:34,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:34,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:34,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1481481614, now seen corresponding path program 1 times [2022-11-25 17:32:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:34,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858295335] [2022-11-25 17:32:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:34,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:34,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:34,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:34,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:32:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:32:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:34,724 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-25 17:32:34,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-25 17:32:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:34,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:34,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:34,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858295335] [2022-11-25 17:32:34,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858295335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:34,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:34,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058769479] [2022-11-25 17:32:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:35,113 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 818 [2022-11-25 17:32:35,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:35,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:35,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 818 [2022-11-25 17:32:35,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:35,545 INFO L130 PetriNetUnfolder]: 1066/1563 cut-off events. [2022-11-25 17:32:35,545 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:32:35,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1563 events. 1066/1563 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5934 event pairs, 828 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 3161. Up to 1563 conditions per place. [2022-11-25 17:32:35,553 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 17:32:35,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 182 flow [2022-11-25 17:32:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1081 transitions. [2022-11-25 17:32:35,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44050529747351264 [2022-11-25 17:32:35,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1081 transitions. [2022-11-25 17:32:35,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1081 transitions. [2022-11-25 17:32:35,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:35,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1081 transitions. [2022-11-25 17:32:35,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.3333333333333) internal successors, (1081), 3 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:35,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:35,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:35,566 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 112 flow. Second operand 3 states and 1081 transitions. [2022-11-25 17:32:35,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 182 flow [2022-11-25 17:32:35,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:35,568 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 103 flow [2022-11-25 17:32:35,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2022-11-25 17:32:35,569 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-11-25 17:32:35,569 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 103 flow [2022-11-25 17:32:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:35,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:35,570 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-11-25 17:32:35,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:35,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2069690103, now seen corresponding path program 1 times [2022-11-25 17:32:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200436751] [2022-11-25 17:32:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:35,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:35,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 17:32:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:32:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:36,024 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-25 17:32:36,024 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 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-25 17:32:36,039 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 [2022-11-25 17:32:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:36,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:36,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:36,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200436751] [2022-11-25 17:32:36,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200436751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:36,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:36,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983046918] [2022-11-25 17:32:36,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:36,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:36,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:36,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 818 [2022-11-25 17:32:36,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:36,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:36,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 818 [2022-11-25 17:32:36,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:36,755 INFO L130 PetriNetUnfolder]: 1011/1478 cut-off events. [2022-11-25 17:32:36,755 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:32:36,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 1478 events. 1011/1478 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5546 event pairs, 784 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 2991. Up to 1478 conditions per place. [2022-11-25 17:32:36,762 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 17:32:36,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 175 flow [2022-11-25 17:32:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1076 transitions. [2022-11-25 17:32:36,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4384678076609617 [2022-11-25 17:32:36,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1076 transitions. [2022-11-25 17:32:36,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1076 transitions. [2022-11-25 17:32:36,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:36,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1076 transitions. [2022-11-25 17:32:36,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.6666666666667) internal successors, (1076), 3 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:36,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:36,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:36,775 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 103 flow. Second operand 3 states and 1076 transitions. [2022-11-25 17:32:36,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 175 flow [2022-11-25 17:32:36,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:36,776 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 100 flow [2022-11-25 17:32:36,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-11-25 17:32:36,777 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2022-11-25 17:32:36,777 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 100 flow [2022-11-25 17:32:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:36,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:36,778 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2022-11-25 17:32:36,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:36,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:36,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2069690104, now seen corresponding path program 1 times [2022-11-25 17:32:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404127624] [2022-11-25 17:32:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:36,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:36,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:36,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:32:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:32:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:37,190 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-25 17:32:37,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-25 17:32:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:37,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:37,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404127624] [2022-11-25 17:32:37,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404127624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:37,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970606734] [2022-11-25 17:32:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:37,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:37,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:37,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 818 [2022-11-25 17:32:37,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:37,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 818 [2022-11-25 17:32:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:37,716 INFO L130 PetriNetUnfolder]: 956/1393 cut-off events. [2022-11-25 17:32:37,716 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-25 17:32:37,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1393 events. 956/1393 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5162 event pairs, 740 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 2821. Up to 1393 conditions per place. [2022-11-25 17:32:37,722 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 35 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2022-11-25 17:32:37,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 168 flow [2022-11-25 17:32:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1068 transitions. [2022-11-25 17:32:37,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4352078239608802 [2022-11-25 17:32:37,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1068 transitions. [2022-11-25 17:32:37,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1068 transitions. [2022-11-25 17:32:37,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:37,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1068 transitions. [2022-11-25 17:32:37,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,734 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 100 flow. Second operand 3 states and 1068 transitions. [2022-11-25 17:32:37,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 168 flow [2022-11-25 17:32:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:37,736 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 97 flow [2022-11-25 17:32:37,736 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2022-11-25 17:32:37,737 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2022-11-25 17:32:37,737 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 97 flow [2022-11-25 17:32:37,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:37,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:37,738 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-25 17:32:37,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:37,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:37,950 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -264116916, now seen corresponding path program 1 times [2022-11-25 17:32:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:37,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922061988] [2022-11-25 17:32:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:37,951 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 [2022-11-25 17:32:37,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:37,952 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:37,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 17:32:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:32:38,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:38,175 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 17:32:38,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 17:32:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:38,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:38,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922061988] [2022-11-25 17:32:38,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922061988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:38,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:38,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:32:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859648105] [2022-11-25 17:32:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:32:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:32:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:32:38,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 818 [2022-11-25 17:32:38,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:38,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:38,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 818 [2022-11-25 17:32:38,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:38,676 INFO L130 PetriNetUnfolder]: 537/792 cut-off events. [2022-11-25 17:32:38,676 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:32:38,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623 conditions, 792 events. 537/792 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2524 event pairs, 387 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 1609. Up to 788 conditions per place. [2022-11-25 17:32:38,680 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-11-25 17:32:38,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 157 flow [2022-11-25 17:32:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:32:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:32:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1390 transitions. [2022-11-25 17:32:38,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4248166259168704 [2022-11-25 17:32:38,685 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1390 transitions. [2022-11-25 17:32:38,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1390 transitions. [2022-11-25 17:32:38,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:38,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1390 transitions. [2022-11-25 17:32:38,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 347.5) internal successors, (1390), 4 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:38,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:38,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:38,697 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 97 flow. Second operand 4 states and 1390 transitions. [2022-11-25 17:32:38,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 157 flow [2022-11-25 17:32:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:38,700 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 94 flow [2022-11-25 17:32:38,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2022-11-25 17:32:38,701 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2022-11-25 17:32:38,701 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 94 flow [2022-11-25 17:32:38,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:38,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:38,702 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-25 17:32:38,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:38,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -264116915, now seen corresponding path program 1 times [2022-11-25 17:32:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:38,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095497752] [2022-11-25 17:32:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:38,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:38,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:38,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 17:32:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:32:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:39,163 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:39,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:39,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:39,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095497752] [2022-11-25 17:32:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095497752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:39,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:39,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:39,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426058550] [2022-11-25 17:32:39,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:32:39,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:39,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:32:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:32:39,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 818 [2022-11-25 17:32:39,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 342.2) internal successors, (1711), 5 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:39,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:39,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 818 [2022-11-25 17:32:39,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:40,065 INFO L130 PetriNetUnfolder]: 845/1250 cut-off events. [2022-11-25 17:32:40,066 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-25 17:32:40,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551 conditions, 1250 events. 845/1250 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4740 event pairs, 387 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 2536. Up to 788 conditions per place. [2022-11-25 17:32:40,071 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 54 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2022-11-25 17:32:40,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 265 flow [2022-11-25 17:32:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1762 transitions. [2022-11-25 17:32:40,084 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308068459657702 [2022-11-25 17:32:40,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1762 transitions. [2022-11-25 17:32:40,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1762 transitions. [2022-11-25 17:32:40,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:40,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1762 transitions. [2022-11-25 17:32:40,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 352.4) internal successors, (1762), 5 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:40,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:40,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:40,098 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 94 flow. Second operand 5 states and 1762 transitions. [2022-11-25 17:32:40,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 265 flow [2022-11-25 17:32:40,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:32:40,100 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 107 flow [2022-11-25 17:32:40,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2022-11-25 17:32:40,102 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2022-11-25 17:32:40,102 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 107 flow [2022-11-25 17:32:40,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.2) internal successors, (1711), 5 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:40,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:40,103 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:40,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:40,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:40,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 402367778, now seen corresponding path program 1 times [2022-11-25 17:32:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:40,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573178878] [2022-11-25 17:32:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:40,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:40,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:40,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 17:32:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:32:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:40,563 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 17:32:40,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 17:32:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:40,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:40,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:40,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573178878] [2022-11-25 17:32:40,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573178878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:40,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:40,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512422680] [2022-11-25 17:32:40,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:40,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 818 [2022-11-25 17:32:40,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:40,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:40,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 818 [2022-11-25 17:32:40,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:41,044 INFO L130 PetriNetUnfolder]: 789/1162 cut-off events. [2022-11-25 17:32:41,044 INFO L131 PetriNetUnfolder]: For 255/255 co-relation queries the response was YES. [2022-11-25 17:32:41,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 1162 events. 789/1162 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4083 event pairs, 591 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 2591. Up to 1162 conditions per place. [2022-11-25 17:32:41,050 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-11-25 17:32:41,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 32 transitions, 167 flow [2022-11-25 17:32:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2022-11-25 17:32:41,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4331703341483293 [2022-11-25 17:32:41,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2022-11-25 17:32:41,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2022-11-25 17:32:41,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:41,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2022-11-25 17:32:41,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:41,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:41,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:41,089 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 107 flow. Second operand 3 states and 1063 transitions. [2022-11-25 17:32:41,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 32 transitions, 167 flow [2022-11-25 17:32:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:32:41,091 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 99 flow [2022-11-25 17:32:41,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2022-11-25 17:32:41,093 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2022-11-25 17:32:41,093 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 99 flow [2022-11-25 17:32:41,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 3 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:41,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:41,094 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:41,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:41,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:41,306 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash 402311760, now seen corresponding path program 1 times [2022-11-25 17:32:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:41,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041210224] [2022-11-25 17:32:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:41,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:41,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:41,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:41,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 17:32:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:32:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:41,557 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:41,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:41,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:42,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041210224] [2022-11-25 17:32:42,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041210224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:42,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:42,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:32:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568259301] [2022-11-25 17:32:42,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:32:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:32:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:32:44,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 818 [2022-11-25 17:32:44,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 99 flow. Second operand has 10 states, 10 states have (on average 341.4) internal successors, (3414), 10 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:44,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:44,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 818 [2022-11-25 17:32:44,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:45,828 INFO L130 PetriNetUnfolder]: 1365/2014 cut-off events. [2022-11-25 17:32:45,828 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-25 17:32:45,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4376 conditions, 2014 events. 1365/2014 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8694 event pairs, 360 based on Foata normal form. 0/1380 useless extension candidates. Maximal degree in co-relation 4360. Up to 732 conditions per place. [2022-11-25 17:32:45,836 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 94 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2022-11-25 17:32:45,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 100 transitions, 454 flow [2022-11-25 17:32:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:32:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:32:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2480 transitions. [2022-11-25 17:32:45,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43311212015368494 [2022-11-25 17:32:45,842 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2480 transitions. [2022-11-25 17:32:45,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2480 transitions. [2022-11-25 17:32:45,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:45,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2480 transitions. [2022-11-25 17:32:45,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 354.2857142857143) internal successors, (2480), 7 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:45,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:45,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:45,858 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 99 flow. Second operand 7 states and 2480 transitions. [2022-11-25 17:32:45,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 100 transitions, 454 flow [2022-11-25 17:32:45,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 100 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:45,861 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 128 flow [2022-11-25 17:32:45,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=128, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2022-11-25 17:32:45,861 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2022-11-25 17:32:45,862 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 128 flow [2022-11-25 17:32:45,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.4) internal successors, (3414), 10 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:45,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:45,863 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:45,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:46,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:46,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 402367776, now seen corresponding path program 1 times [2022-11-25 17:32:46,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:46,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701064372] [2022-11-25 17:32:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:46,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:46,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:46,078 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:46,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 17:32:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:32:46,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:32:46,360 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 17:32:46,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 17:32:46,402 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 130 treesize of output 126 [2022-11-25 17:32:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:46,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:46,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:46,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701064372] [2022-11-25 17:32:46,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701064372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:46,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:46,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:32:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902953572] [2022-11-25 17:32:46,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:46,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:32:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:32:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:32:46,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 818 [2022-11-25 17:32:46,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:46,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:46,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 818 [2022-11-25 17:32:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:47,042 INFO L130 PetriNetUnfolder]: 1269/1862 cut-off events. [2022-11-25 17:32:47,042 INFO L131 PetriNetUnfolder]: For 1012/1012 co-relation queries the response was YES. [2022-11-25 17:32:47,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 1862 events. 1269/1862 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7323 event pairs, 975 based on Foata normal form. 0/1358 useless extension candidates. Maximal degree in co-relation 4411. Up to 1862 conditions per place. [2022-11-25 17:32:47,049 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2022-11-25 17:32:47,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 32 transitions, 188 flow [2022-11-25 17:32:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:32:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:32:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1073 transitions. [2022-11-25 17:32:47,053 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4372453137734311 [2022-11-25 17:32:47,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1073 transitions. [2022-11-25 17:32:47,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1073 transitions. [2022-11-25 17:32:47,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:47,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1073 transitions. [2022-11-25 17:32:47,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:47,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:47,061 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 818.0) internal successors, (3272), 4 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:47,061 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 128 flow. Second operand 3 states and 1073 transitions. [2022-11-25 17:32:47,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 32 transitions, 188 flow [2022-11-25 17:32:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 32 transitions, 179 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:32:47,063 INFO L231 Difference]: Finished difference. Result has 50 places, 32 transitions, 117 flow [2022-11-25 17:32:47,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=32} [2022-11-25 17:32:47,064 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2022-11-25 17:32:47,064 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 32 transitions, 117 flow [2022-11-25 17:32:47,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:47,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:47,065 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:47,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:47,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:47,277 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash -411500919, now seen corresponding path program 1 times [2022-11-25 17:32:47,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335741463] [2022-11-25 17:32:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:47,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:47,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 17:32:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:32:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:47,558 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:47,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:47,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:47,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:47,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335741463] [2022-11-25 17:32:47,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335741463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:47,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:47,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620503380] [2022-11-25 17:32:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:32:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:47,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:32:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:32:47,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 818 [2022-11-25 17:32:47,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 32 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:47,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:47,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 818 [2022-11-25 17:32:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:48,602 INFO L130 PetriNetUnfolder]: 1909/2806 cut-off events. [2022-11-25 17:32:48,602 INFO L131 PetriNetUnfolder]: For 1174/1174 co-relation queries the response was YES. [2022-11-25 17:32:48,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 2806 events. 1909/2806 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12554 event pairs, 975 based on Foata normal form. 0/2042 useless extension candidates. Maximal degree in co-relation 6433. Up to 1858 conditions per place. [2022-11-25 17:32:48,611 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 17:32:48,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 297 flow [2022-11-25 17:32:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1752 transitions. [2022-11-25 17:32:48,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42836185819070904 [2022-11-25 17:32:48,616 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1752 transitions. [2022-11-25 17:32:48,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1752 transitions. [2022-11-25 17:32:48,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:48,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1752 transitions. [2022-11-25 17:32:48,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 350.4) internal successors, (1752), 5 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:48,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:48,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:48,627 INFO L175 Difference]: Start difference. First operand has 50 places, 32 transitions, 117 flow. Second operand 5 states and 1752 transitions. [2022-11-25 17:32:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 297 flow [2022-11-25 17:32:48,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 54 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:32:48,630 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 132 flow [2022-11-25 17:32:48,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2022-11-25 17:32:48,630 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2022-11-25 17:32:48,630 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 132 flow [2022-11-25 17:32:48,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 342.6) internal successors, (1713), 5 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:48,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:48,631 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:48,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:48,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash 128376505, now seen corresponding path program 1 times [2022-11-25 17:32:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:48,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050637521] [2022-11-25 17:32:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:48,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:48,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:48,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 17:32:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:32:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:49,114 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:49,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:49,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:49,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050637521] [2022-11-25 17:32:49,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050637521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:49,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:49,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:32:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134723040] [2022-11-25 17:32:49,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:49,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:32:49,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:49,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:32:49,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:32:51,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 818 [2022-11-25 17:32:51,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 132 flow. Second operand has 10 states, 10 states have (on average 341.8) internal successors, (3418), 10 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:51,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:51,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 818 [2022-11-25 17:32:51,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:53,586 INFO L130 PetriNetUnfolder]: 3189/4694 cut-off events. [2022-11-25 17:32:53,586 INFO L131 PetriNetUnfolder]: For 2523/2523 co-relation queries the response was YES. [2022-11-25 17:32:53,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 4694 events. 3189/4694 cut-off events. For 2523/2523 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 23465 event pairs, 975 based on Foata normal form. 0/3938 useless extension candidates. Maximal degree in co-relation 11654. Up to 1858 conditions per place. [2022-11-25 17:32:53,607 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 92 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2022-11-25 17:32:53,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 546 flow [2022-11-25 17:32:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:32:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:32:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2466 transitions. [2022-11-25 17:32:53,615 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4306671323786238 [2022-11-25 17:32:53,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2466 transitions. [2022-11-25 17:32:53,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2466 transitions. [2022-11-25 17:32:53,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:53,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2466 transitions. [2022-11-25 17:32:53,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 352.2857142857143) internal successors, (2466), 7 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:53,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:53,630 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:53,630 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 132 flow. Second operand 7 states and 2466 transitions. [2022-11-25 17:32:53,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 546 flow [2022-11-25 17:32:53,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 98 transitions, 540 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:32:53,634 INFO L231 Difference]: Finished difference. Result has 59 places, 35 transitions, 156 flow [2022-11-25 17:32:53,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=59, PETRI_TRANSITIONS=35} [2022-11-25 17:32:53,635 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2022-11-25 17:32:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 35 transitions, 156 flow [2022-11-25 17:32:53,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 341.8) internal successors, (3418), 10 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:53,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:53,637 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-11-25 17:32:53,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:53,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:53,850 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:53,850 INFO L85 PathProgramCache]: Analyzing trace with hash 74593776, now seen corresponding path program 2 times [2022-11-25 17:32:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:53,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80314443] [2022-11-25 17:32:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:53,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:53,853 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:53,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 17:32:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:54,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:32:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:54,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:54,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80314443] [2022-11-25 17:32:54,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80314443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:54,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:54,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 17:32:54,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872532704] [2022-11-25 17:32:54,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:32:54,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:54,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:32:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:32:54,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 818 [2022-11-25 17:32:54,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 35 transitions, 156 flow. Second operand has 10 states, 10 states have (on average 351.4) internal successors, (3514), 10 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:54,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:54,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 818 [2022-11-25 17:32:54,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:55,975 INFO L130 PetriNetUnfolder]: 2845/4248 cut-off events. [2022-11-25 17:32:55,975 INFO L131 PetriNetUnfolder]: For 3566/3566 co-relation queries the response was YES. [2022-11-25 17:32:55,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11170 conditions, 4248 events. 2845/4248 cut-off events. For 3566/3566 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22024 event pairs, 111 based on Foata normal form. 204/3868 useless extension candidates. Maximal degree in co-relation 11147. Up to 1000 conditions per place. [2022-11-25 17:32:55,993 INFO L137 encePairwiseOnDemand]: 815/818 looper letters, 114 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2022-11-25 17:32:55,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 118 transitions, 685 flow [2022-11-25 17:32:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:32:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:32:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2203 transitions. [2022-11-25 17:32:55,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44885900570497145 [2022-11-25 17:32:55,999 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2203 transitions. [2022-11-25 17:32:55,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2203 transitions. [2022-11-25 17:32:56,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:56,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2203 transitions. [2022-11-25 17:32:56,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 367.1666666666667) internal successors, (2203), 6 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:56,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 818.0) internal successors, (5726), 7 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:56,012 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 818.0) internal successors, (5726), 7 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:56,013 INFO L175 Difference]: Start difference. First operand has 59 places, 35 transitions, 156 flow. Second operand 6 states and 2203 transitions. [2022-11-25 17:32:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 118 transitions, 685 flow [2022-11-25 17:32:56,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 643 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-25 17:32:56,026 INFO L231 Difference]: Finished difference. Result has 56 places, 33 transitions, 132 flow [2022-11-25 17:32:56,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=56, PETRI_TRANSITIONS=33} [2022-11-25 17:32:56,027 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-11-25 17:32:56,027 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 33 transitions, 132 flow [2022-11-25 17:32:56,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 351.4) internal successors, (3514), 10 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:56,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:56,029 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:56,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:32:56,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:56,243 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:56,243 INFO L85 PathProgramCache]: Analyzing trace with hash -314192257, now seen corresponding path program 1 times [2022-11-25 17:32:56,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:56,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627556364] [2022-11-25 17:32:56,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:56,244 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:56,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 17:32:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:56,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:32:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:56,516 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:56,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:56,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:32:56,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627556364] [2022-11-25 17:32:56,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627556364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:32:56,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:32:56,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:32:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866208314] [2022-11-25 17:32:56,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:32:56,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:32:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:32:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:32:57,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 818 [2022-11-25 17:32:57,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 33 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 343.0) internal successors, (1715), 5 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:57,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:57,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 818 [2022-11-25 17:32:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:58,212 INFO L130 PetriNetUnfolder]: 4089/6108 cut-off events. [2022-11-25 17:32:58,212 INFO L131 PetriNetUnfolder]: For 4364/4364 co-relation queries the response was YES. [2022-11-25 17:32:58,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15423 conditions, 6108 events. 4089/6108 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31920 event pairs, 2431 based on Foata normal form. 0/5232 useless extension candidates. Maximal degree in co-relation 15404. Up to 4244 conditions per place. [2022-11-25 17:32:58,234 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 50 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-25 17:32:58,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 323 flow [2022-11-25 17:32:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:32:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:32:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1748 transitions. [2022-11-25 17:32:58,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4273838630806846 [2022-11-25 17:32:58,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1748 transitions. [2022-11-25 17:32:58,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1748 transitions. [2022-11-25 17:32:58,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:58,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1748 transitions. [2022-11-25 17:32:58,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.6) internal successors, (1748), 5 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:58,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:58,249 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 818.0) internal successors, (4908), 6 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:58,250 INFO L175 Difference]: Start difference. First operand has 56 places, 33 transitions, 132 flow. Second operand 5 states and 1748 transitions. [2022-11-25 17:32:58,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 323 flow [2022-11-25 17:32:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:32:58,255 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 141 flow [2022-11-25 17:32:58,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2022-11-25 17:32:58,255 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-11-25 17:32:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 141 flow [2022-11-25 17:32:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 343.0) internal successors, (1715), 5 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:32:58,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:58,256 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:58,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:58,469 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:32:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:58,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1150022677, now seen corresponding path program 1 times [2022-11-25 17:32:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:32:58,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259121558] [2022-11-25 17:32:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:58,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:32:58,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:32:58,470 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:32:58,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 17:32:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:32:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:58,749 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:32:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:32:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:58,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:32:59,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:32:59,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259121558] [2022-11-25 17:32:59,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259121558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:59,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:32:59,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 17:32:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021287635] [2022-11-25 17:32:59,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:59,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:32:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:32:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:32:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:33:01,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 818 [2022-11-25 17:33:01,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 141 flow. Second operand has 10 states, 10 states have (on average 342.2) internal successors, (3422), 10 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:01,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:01,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 818 [2022-11-25 17:33:01,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:04,437 INFO L130 PetriNetUnfolder]: 6577/9828 cut-off events. [2022-11-25 17:33:04,437 INFO L131 PetriNetUnfolder]: For 6918/6918 co-relation queries the response was YES. [2022-11-25 17:33:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26052 conditions, 9828 events. 6577/9828 cut-off events. For 6918/6918 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55858 event pairs, 2431 based on Foata normal form. 0/9536 useless extension candidates. Maximal degree in co-relation 26031. Up to 4244 conditions per place. [2022-11-25 17:33:04,502 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 90 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2022-11-25 17:33:04,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 563 flow [2022-11-25 17:33:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:33:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:33:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2456 transitions. [2022-11-25 17:33:04,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4289207125392944 [2022-11-25 17:33:04,510 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2456 transitions. [2022-11-25 17:33:04,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2456 transitions. [2022-11-25 17:33:04,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:04,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2456 transitions. [2022-11-25 17:33:04,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 350.85714285714283) internal successors, (2456), 7 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:04,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:04,519 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 818.0) internal successors, (6544), 8 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:04,519 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 141 flow. Second operand 7 states and 2456 transitions. [2022-11-25 17:33:04,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 563 flow [2022-11-25 17:33:04,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 557 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:33:04,530 INFO L231 Difference]: Finished difference. Result has 62 places, 36 transitions, 165 flow [2022-11-25 17:33:04,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=62, PETRI_TRANSITIONS=36} [2022-11-25 17:33:04,531 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2022-11-25 17:33:04,531 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 36 transitions, 165 flow [2022-11-25 17:33:04,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 342.2) internal successors, (3422), 10 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:04,532 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:04,532 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:04,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:04,741 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:04,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1184130887, now seen corresponding path program 2 times [2022-11-25 17:33:04,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:04,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603620985] [2022-11-25 17:33:04,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:33:04,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:04,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:04,744 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:04,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 17:33:04,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:33:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:04,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:33:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:05,064 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:33:05,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:33:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:05,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:05,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603620985] [2022-11-25 17:33:05,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603620985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:05,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:05,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-11-25 17:33:05,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918532275] [2022-11-25 17:33:05,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:05,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:33:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:05,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:33:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:33:09,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 818 [2022-11-25 17:33:09,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 36 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 341.8333333333333) internal successors, (4102), 12 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:09,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:09,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 818 [2022-11-25 17:33:09,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:12,291 INFO L130 PetriNetUnfolder]: 5675/8648 cut-off events. [2022-11-25 17:33:12,291 INFO L131 PetriNetUnfolder]: For 8811/8811 co-relation queries the response was YES. [2022-11-25 17:33:12,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24153 conditions, 8648 events. 5675/8648 cut-off events. For 8811/8811 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 51406 event pairs, 337 based on Foata normal form. 556/9204 useless extension candidates. Maximal degree in co-relation 24130. Up to 1996 conditions per place. [2022-11-25 17:33:12,330 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 111 selfloop transitions, 6 changer transitions 0/117 dead transitions. [2022-11-25 17:33:12,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 117 transitions, 713 flow [2022-11-25 17:33:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:33:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:33:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2812 transitions. [2022-11-25 17:33:12,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4297066014669927 [2022-11-25 17:33:12,339 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2812 transitions. [2022-11-25 17:33:12,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2812 transitions. [2022-11-25 17:33:12,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:12,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2812 transitions. [2022-11-25 17:33:12,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 351.5) internal successors, (2812), 8 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:12,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 818.0) internal successors, (7362), 9 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:12,350 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 818.0) internal successors, (7362), 9 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:12,350 INFO L175 Difference]: Start difference. First operand has 62 places, 36 transitions, 165 flow. Second operand 8 states and 2812 transitions. [2022-11-25 17:33:12,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 117 transitions, 713 flow [2022-11-25 17:33:12,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 117 transitions, 671 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-25 17:33:12,387 INFO L231 Difference]: Finished difference. Result has 61 places, 34 transitions, 145 flow [2022-11-25 17:33:12,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=34} [2022-11-25 17:33:12,388 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2022-11-25 17:33:12,388 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 34 transitions, 145 flow [2022-11-25 17:33:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 341.8333333333333) internal successors, (4102), 12 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:12,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:12,389 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:12,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:12,590 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:12,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1365111189, now seen corresponding path program 2 times [2022-11-25 17:33:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:12,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807795322] [2022-11-25 17:33:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:33:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:12,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:12,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 17:33:12,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:33:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:33:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:33:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:12,903 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 17:33:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 17:33:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:13,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:13,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:13,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807795322] [2022-11-25 17:33:13,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807795322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:13,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:33:13,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-11-25 17:33:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183570401] [2022-11-25 17:33:13,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:13,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:33:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:33:13,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:33:16,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 818 [2022-11-25 17:33:16,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 34 transitions, 145 flow. Second operand has 12 states, 12 states have (on average 342.1666666666667) internal successors, (4106), 12 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:16,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:16,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 818 [2022-11-25 17:33:16,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:19,249 INFO L130 PetriNetUnfolder]: 4872/7579 cut-off events. [2022-11-25 17:33:19,249 INFO L131 PetriNetUnfolder]: For 4326/4326 co-relation queries the response was YES. [2022-11-25 17:33:19,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19630 conditions, 7579 events. 4872/7579 cut-off events. For 4326/4326 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 44416 event pairs, 576 based on Foata normal form. 532/8111 useless extension candidates. Maximal degree in co-relation 19610. Up to 1638 conditions per place. [2022-11-25 17:33:19,277 INFO L137 encePairwiseOnDemand]: 813/818 looper letters, 95 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2022-11-25 17:33:19,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 566 flow [2022-11-25 17:33:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:33:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:33:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2801 transitions. [2022-11-25 17:33:19,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42802567237163813 [2022-11-25 17:33:19,282 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2801 transitions. [2022-11-25 17:33:19,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2801 transitions. [2022-11-25 17:33:19,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:19,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2801 transitions. [2022-11-25 17:33:19,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 350.125) internal successors, (2801), 8 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:19,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 818.0) internal successors, (7362), 9 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:19,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 818.0) internal successors, (7362), 9 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:19,290 INFO L175 Difference]: Start difference. First operand has 61 places, 34 transitions, 145 flow. Second operand 8 states and 2801 transitions. [2022-11-25 17:33:19,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 566 flow [2022-11-25 17:33:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 518 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-11-25 17:33:19,337 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 123 flow [2022-11-25 17:33:19,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=123, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2022-11-25 17:33:19,337 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-11-25 17:33:19,338 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 123 flow [2022-11-25 17:33:19,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 342.1666666666667) internal successors, (4106), 12 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:19,338 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:19,339 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:19,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:19,552 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1456145384, now seen corresponding path program 1 times [2022-11-25 17:33:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310298103] [2022-11-25 17:33:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:19,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:19,553 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:19,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 17:33:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:33:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:19,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:33:19,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310298103] [2022-11-25 17:33:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310298103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:19,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:19,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:33:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765551401] [2022-11-25 17:33:19,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:19,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:33:19,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:33:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:33:20,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 818 [2022-11-25 17:33:20,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:20,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:20,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 818 [2022-11-25 17:33:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:21,653 INFO L130 PetriNetUnfolder]: 4872/7563 cut-off events. [2022-11-25 17:33:21,653 INFO L131 PetriNetUnfolder]: For 2892/2892 co-relation queries the response was YES. [2022-11-25 17:33:21,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18838 conditions, 7563 events. 4872/7563 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 43407 event pairs, 3710 based on Foata normal form. 16/7579 useless extension candidates. Maximal degree in co-relation 18821. Up to 5788 conditions per place. [2022-11-25 17:33:21,680 INFO L137 encePairwiseOnDemand]: 814/818 looper letters, 45 selfloop transitions, 2 changer transitions 21/68 dead transitions. [2022-11-25 17:33:21,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 380 flow [2022-11-25 17:33:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:33:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:33:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1402 transitions. [2022-11-25 17:33:21,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4284841075794621 [2022-11-25 17:33:21,683 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1402 transitions. [2022-11-25 17:33:21,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1402 transitions. [2022-11-25 17:33:21,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:21,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1402 transitions. [2022-11-25 17:33:21,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.5) internal successors, (1402), 4 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:21,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:21,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:21,688 INFO L175 Difference]: Start difference. First operand has 57 places, 32 transitions, 123 flow. Second operand 4 states and 1402 transitions. [2022-11-25 17:33:21,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 380 flow [2022-11-25 17:33:21,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 355 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:33:21,692 INFO L231 Difference]: Finished difference. Result has 56 places, 32 transitions, 122 flow [2022-11-25 17:33:21,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=32} [2022-11-25 17:33:21,692 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2022-11-25 17:33:21,692 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 32 transitions, 122 flow [2022-11-25 17:33:21,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:21,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:21,693 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:21,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:21,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:21,893 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:21,894 INFO L85 PathProgramCache]: Analyzing trace with hash -313603341, now seen corresponding path program 1 times [2022-11-25 17:33:21,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:21,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615212407] [2022-11-25 17:33:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:21,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:21,895 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:21,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 17:33:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:33:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:22,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:33:22,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:33:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615212407] [2022-11-25 17:33:22,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615212407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:22,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:33:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046904345] [2022-11-25 17:33:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:22,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:33:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:33:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:33:22,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:33:22,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 818 [2022-11-25 17:33:22,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 32 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:22,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:22,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 818 [2022-11-25 17:33:22,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:23,867 INFO L130 PetriNetUnfolder]: 4115/6362 cut-off events. [2022-11-25 17:33:23,867 INFO L131 PetriNetUnfolder]: For 2962/2962 co-relation queries the response was YES. [2022-11-25 17:33:23,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 6362 events. 4115/6362 cut-off events. For 2962/2962 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35363 event pairs, 3151 based on Foata normal form. 12/6374 useless extension candidates. Maximal degree in co-relation 16410. Up to 4905 conditions per place. [2022-11-25 17:33:23,897 INFO L137 encePairwiseOnDemand]: 814/818 looper letters, 45 selfloop transitions, 2 changer transitions 19/66 dead transitions. [2022-11-25 17:33:23,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 372 flow [2022-11-25 17:33:23,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:33:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:33:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1400 transitions. [2022-11-25 17:33:23,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4278728606356968 [2022-11-25 17:33:23,900 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1400 transitions. [2022-11-25 17:33:23,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1400 transitions. [2022-11-25 17:33:23,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:23,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1400 transitions. [2022-11-25 17:33:23,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:23,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:23,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 818.0) internal successors, (4090), 5 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:23,907 INFO L175 Difference]: Start difference. First operand has 56 places, 32 transitions, 122 flow. Second operand 4 states and 1400 transitions. [2022-11-25 17:33:23,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 372 flow [2022-11-25 17:33:23,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 352 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:33:23,910 INFO L231 Difference]: Finished difference. Result has 57 places, 32 transitions, 124 flow [2022-11-25 17:33:23,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=818, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=32} [2022-11-25 17:33:23,911 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2022-11-25 17:33:23,911 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 32 transitions, 124 flow [2022-11-25 17:33:23,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.5) internal successors, (1370), 4 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:23,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:23,912 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:33:23,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:24,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:24,126 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 17:33:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:24,127 INFO L85 PathProgramCache]: Analyzing trace with hash -299744021, now seen corresponding path program 1 times [2022-11-25 17:33:24,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:33:24,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435466139] [2022-11-25 17:33:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:33:24,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:33:24,129 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 17:33:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a98e7d5-f373-4ccb-aef8-9f9fa2de6fe4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 17:33:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:33:24,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:24,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:33:24,977 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 602 treesize of output 228 [2022-11-25 17:33:37,346 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 65 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:33:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:33:38,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:41,002 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-25 17:33:41,002 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 523 treesize of output 191 [2022-11-25 17:34:46,291 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 166 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:34:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:34:46,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:34:46,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435466139] [2022-11-25 17:34:46,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435466139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:46,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:34:46,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 17:34:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988262296] [2022-11-25 17:34:46,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:46,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:34:46,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:34:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:34:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:34:57,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 818 [2022-11-25 17:34:57,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 32 transitions, 124 flow. Second operand has 14 states, 14 states have (on average 310.92857142857144) internal successors, (4353), 14 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:57,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:57,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 818 [2022-11-25 17:34:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:35:39,731 WARN L233 SmtUtils]: Spent 40.64s on a formula simplification. DAG size of input: 97 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:36:01,228 WARN L233 SmtUtils]: Spent 20.23s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:36:43,739 WARN L233 SmtUtils]: Spent 41.14s on a formula simplification. DAG size of input: 125 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:36:46,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 17:37:29,128 WARN L233 SmtUtils]: Spent 40.62s on a formula simplification. DAG size of input: 88 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:37:31,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 17:38:12,879 WARN L233 SmtUtils]: Spent 41.20s on a formula simplification. DAG size of input: 135 DAG size of output: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:38:33,822 WARN L233 SmtUtils]: Spent 20.67s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:39:19,520 WARN L233 SmtUtils]: Spent 44.01s on a formula simplification. DAG size of input: 163 DAG size of output: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:39:40,853 WARN L233 SmtUtils]: Spent 20.52s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:40:25,012 WARN L233 SmtUtils]: Spent 42.67s on a formula simplification. DAG size of input: 140 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:41:10,288 WARN L233 SmtUtils]: Spent 44.93s on a formula simplification. DAG size of input: 106 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:41:31,882 WARN L233 SmtUtils]: Spent 21.24s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:41:52,704 WARN L233 SmtUtils]: Spent 20.50s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:42:43,257 WARN L233 SmtUtils]: Spent 47.59s on a formula simplification. DAG size of input: 134 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:43:28,409 WARN L233 SmtUtils]: Spent 44.81s on a formula simplification. DAG size of input: 168 DAG size of output: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:44:15,525 WARN L233 SmtUtils]: Spent 44.79s on a formula simplification. DAG size of input: 111 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:44:36,192 WARN L233 SmtUtils]: Spent 20.39s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:44:57,103 WARN L233 SmtUtils]: Spent 20.70s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:45:45,054 WARN L233 SmtUtils]: Spent 47.58s on a formula simplification. DAG size of input: 139 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:46:28,204 WARN L233 SmtUtils]: Spent 40.77s on a formula simplification. DAG size of input: 89 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)