./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:09:27,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:09:27,637 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:09:27,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:09:27,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:09:27,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:09:27,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:09:27,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:09:27,673 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:09:27,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:09:27,675 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:09:27,676 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:09:27,676 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:09:27,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:09:27,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:09:27,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:09:27,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:09:27,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:09:27,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:09:27,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:09:27,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:09:27,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:09:27,682 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:09:27,683 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:09:27,683 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:09:27,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:09:27,684 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:09:27,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:09:27,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:27,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:09:27,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:09:27,687 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:09:27,688 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:09:27,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:09:27,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:09:27,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:09:27,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:09:27,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:09:27,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:09:27,692 INFO L153 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_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-19 07:09:27,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:09:27,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:09:27,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:09:27,969 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:09:27,969 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:09:27,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-19 07:09:31,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:09:31,411 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:09:31,412 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-19 07:09:31,424 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/data/0c847267e/5c3b8419500f4217b965654fa309a062/FLAG8d62c24a4 [2023-11-19 07:09:31,443 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/data/0c847267e/5c3b8419500f4217b965654fa309a062 [2023-11-19 07:09:31,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:09:31,452 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:09:31,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:31,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:09:31,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:09:31,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae4549c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31, skipping insertion in model container [2023-11-19 07:09:31,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,508 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:09:31,743 WARN L240 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_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2023-11-19 07:09:31,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:31,764 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:09:31,803 WARN L240 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_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2820,2833] [2023-11-19 07:09:31,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:09:31,829 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:09:31,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31 WrapperNode [2023-11-19 07:09:31,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:09:31,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:31,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:09:31,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:09:31,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,885 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 292 [2023-11-19 07:09:31,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:09:31,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:09:31,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:09:31,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:09:31,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,935 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,940 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:09:31,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:09:31,942 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:09:31,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:09:31,943 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (1/1) ... [2023-11-19 07:09:31,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:09:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:31,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:09:32,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:09:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:09:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:09:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:09:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:09:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:09:32,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:09:32,053 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:09:32,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:09:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:09:32,054 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:09:32,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:09:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:09:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:09:32,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:09:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:09:32,060 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:09:32,190 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:09:32,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:09:32,761 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:09:32,776 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:09:32,776 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:09:32,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:32 BoogieIcfgContainer [2023-11-19 07:09:32,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:09:32,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:09:32,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:09:32,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:09:32,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:09:31" (1/3) ... [2023-11-19 07:09:32,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39146aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:32, skipping insertion in model container [2023-11-19 07:09:32,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:09:31" (2/3) ... [2023-11-19 07:09:32,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39146aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:09:32, skipping insertion in model container [2023-11-19 07:09:32,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:09:32" (3/3) ... [2023-11-19 07:09:32,795 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-19 07:09:32,804 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:09:32,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:09:32,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:09:32,814 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:09:32,944 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:09:32,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 366 transitions, 753 flow [2023-11-19 07:09:33,231 INFO L124 PetriNetUnfolderBase]: 29/363 cut-off events. [2023-11-19 07:09:33,232 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:09:33,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 363 events. 29/363 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 595 event pairs, 0 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 276. Up to 3 conditions per place. [2023-11-19 07:09:33,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 347 places, 366 transitions, 753 flow [2023-11-19 07:09:33,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 352 transitions, 722 flow [2023-11-19 07:09:33,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:09:33,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 352 transitions, 722 flow [2023-11-19 07:09:33,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 352 transitions, 722 flow [2023-11-19 07:09:33,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 352 transitions, 722 flow [2023-11-19 07:09:33,426 INFO L124 PetriNetUnfolderBase]: 29/352 cut-off events. [2023-11-19 07:09:33,427 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:09:33,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 352 events. 29/352 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 592 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 276. Up to 3 conditions per place. [2023-11-19 07:09:33,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 19278 [2023-11-19 07:09:44,849 INFO L134 LiptonReduction]: Checked pairs total: 20577 [2023-11-19 07:09:44,849 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-11-19 07:09:44,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:09:44,873 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2f7401af, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:09:44,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:09:44,882 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:09:44,883 INFO L124 PetriNetUnfolderBase]: 8/35 cut-off events. [2023-11-19 07:09:44,883 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:09:44,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:09:44,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:44,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:09:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:44,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1983366797, now seen corresponding path program 1 times [2023-11-19 07:09:44,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:44,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152039916] [2023-11-19 07:09:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:44,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152039916] [2023-11-19 07:09:46,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152039916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:46,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:09:46,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:09:46,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106046939] [2023-11-19 07:09:46,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:46,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:09:46,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:09:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:09:47,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 764 [2023-11-19 07:09:47,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 10 states, 10 states have (on average 309.2) internal successors, (3092), 10 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:47,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:09:47,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 764 [2023-11-19 07:09:47,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:09:48,579 INFO L124 PetriNetUnfolderBase]: 1493/2192 cut-off events. [2023-11-19 07:09:48,580 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-11-19 07:09:48,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 2192 events. 1493/2192 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9291 event pairs, 298 based on Foata normal form. 1/1715 useless extension candidates. Maximal degree in co-relation 2056. Up to 961 conditions per place. [2023-11-19 07:09:48,603 INFO L140 encePairwiseOnDemand]: 752/764 looper letters, 109 selfloop transitions, 13 changer transitions 7/130 dead transitions. [2023-11-19 07:09:48,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 130 transitions, 584 flow [2023-11-19 07:09:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:09:48,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:09:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3202 transitions. [2023-11-19 07:09:48,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191099476439791 [2023-11-19 07:09:48,637 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3202 transitions. [2023-11-19 07:09:48,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3202 transitions. [2023-11-19 07:09:48,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:09:48,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3202 transitions. [2023-11-19 07:09:48,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 320.2) internal successors, (3202), 10 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:48,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 764.0) internal successors, (8404), 11 states have internal predecessors, (8404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:48,725 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 764.0) internal successors, (8404), 11 states have internal predecessors, (8404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:48,727 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 10 states and 3202 transitions. [2023-11-19 07:09:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 130 transitions, 584 flow [2023-11-19 07:09:48,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 130 transitions, 540 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:09:48,744 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 170 flow [2023-11-19 07:09:48,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=764, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-11-19 07:09:48,755 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2023-11-19 07:09:48,755 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 170 flow [2023-11-19 07:09:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 309.2) internal successors, (3092), 10 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:09:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:09:48,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:09:48,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2078574592, now seen corresponding path program 1 times [2023-11-19 07:09:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022342681] [2023-11-19 07:09:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:49,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022342681] [2023-11-19 07:09:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022342681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816771228] [2023-11-19 07:09:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:49,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:49,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:49,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:49,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:09:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:49,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:09:49,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:49,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:49,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816771228] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:49,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:49,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2023-11-19 07:09:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134853087] [2023-11-19 07:09:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:49,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:09:49,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:49,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:09:49,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:09:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 764 [2023-11-19 07:09:49,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 310.875) internal successors, (2487), 8 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:49,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:09:49,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 764 [2023-11-19 07:09:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:09:50,877 INFO L124 PetriNetUnfolderBase]: 3120/4538 cut-off events. [2023-11-19 07:09:50,878 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2023-11-19 07:09:50,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 4538 events. 3120/4538 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21546 event pairs, 1602 based on Foata normal form. 1/3696 useless extension candidates. Maximal degree in co-relation 9338. Up to 2139 conditions per place. [2023-11-19 07:09:50,919 INFO L140 encePairwiseOnDemand]: 756/764 looper letters, 122 selfloop transitions, 8 changer transitions 6/137 dead transitions. [2023-11-19 07:09:50,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 137 transitions, 705 flow [2023-11-19 07:09:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:09:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:09:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2277 transitions. [2023-11-19 07:09:50,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257666417352281 [2023-11-19 07:09:50,931 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2277 transitions. [2023-11-19 07:09:50,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2277 transitions. [2023-11-19 07:09:50,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:09:50,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2277 transitions. [2023-11-19 07:09:50,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:50,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 764.0) internal successors, (6112), 8 states have internal predecessors, (6112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:50,960 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 764.0) internal successors, (6112), 8 states have internal predecessors, (6112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:50,960 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 170 flow. Second operand 7 states and 2277 transitions. [2023-11-19 07:09:50,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 137 transitions, 705 flow [2023-11-19 07:09:50,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 137 transitions, 699 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:09:50,980 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 210 flow [2023-11-19 07:09:50,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=764, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-19 07:09:50,982 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-11-19 07:09:50,982 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 210 flow [2023-11-19 07:09:50,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 310.875) internal successors, (2487), 8 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:09:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:51,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:09:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:09:51,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:09:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 815625236, now seen corresponding path program 1 times [2023-11-19 07:09:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898619048] [2023-11-19 07:09:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:51,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:52,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:52,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898619048] [2023-11-19 07:09:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898619048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565683659] [2023-11-19 07:09:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:52,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:52,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:52,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:09:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:52,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:09:52,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:52,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:09:52,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 127 treesize of output 108 [2023-11-19 07:09:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:52,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:09:53,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:09:53,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 145 treesize of output 125 [2023-11-19 07:09:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565683659] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:53,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:09:53,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 25 [2023-11-19 07:09:53,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169881911] [2023-11-19 07:09:53,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:53,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:09:53,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:53,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:09:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:09:55,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 764 [2023-11-19 07:09:55,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 210 flow. Second operand has 12 states, 12 states have (on average 297.9166666666667) internal successors, (3575), 12 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:55,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:09:55,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 764 [2023-11-19 07:09:55,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:09:57,077 INFO L124 PetriNetUnfolderBase]: 4676/6773 cut-off events. [2023-11-19 07:09:57,077 INFO L125 PetriNetUnfolderBase]: For 2716/2740 co-relation queries the response was YES. [2023-11-19 07:09:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 6773 events. 4676/6773 cut-off events. For 2716/2740 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34370 event pairs, 1318 based on Foata normal form. 1/5544 useless extension candidates. Maximal degree in co-relation 14131. Up to 2273 conditions per place. [2023-11-19 07:09:57,138 INFO L140 encePairwiseOnDemand]: 751/764 looper letters, 174 selfloop transitions, 30 changer transitions 3/208 dead transitions. [2023-11-19 07:09:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 208 transitions, 1106 flow [2023-11-19 07:09:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:09:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:09:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3737 transitions. [2023-11-19 07:09:57,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076134380453752 [2023-11-19 07:09:57,155 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3737 transitions. [2023-11-19 07:09:57,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3737 transitions. [2023-11-19 07:09:57,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:09:57,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3737 transitions. [2023-11-19 07:09:57,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 311.4166666666667) internal successors, (3737), 12 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:57,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 764.0) internal successors, (9932), 13 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:57,194 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 764.0) internal successors, (9932), 13 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:57,194 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 210 flow. Second operand 12 states and 3737 transitions. [2023-11-19 07:09:57,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 208 transitions, 1106 flow [2023-11-19 07:09:57,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 208 transitions, 1095 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-19 07:09:57,222 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 470 flow [2023-11-19 07:09:57,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=764, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=470, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2023-11-19 07:09:57,224 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-11-19 07:09:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 470 flow [2023-11-19 07:09:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 297.9166666666667) internal successors, (3575), 12 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:57,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:09:57,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:09:57,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:09:57,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:09:57,447 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:09:57,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:09:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash 331284278, now seen corresponding path program 2 times [2023-11-19 07:09:57,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:09:57,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200723179] [2023-11-19 07:09:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:09:57,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:09:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:09:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:09:58,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:09:58,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200723179] [2023-11-19 07:09:58,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200723179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:09:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134813455] [2023-11-19 07:09:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:09:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:09:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:09:58,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:09:58,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:09:58,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:09:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:09:58,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:09:58,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:09:58,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:09:58,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 77 treesize of output 74 [2023-11-19 07:09:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:09:58,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:09:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134813455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:09:58,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:09:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-19 07:09:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670625358] [2023-11-19 07:09:58,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:09:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:09:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:09:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:09:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:09:59,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 764 [2023-11-19 07:09:59,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 470 flow. Second operand has 9 states, 9 states have (on average 307.55555555555554) internal successors, (2768), 9 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:09:59,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:09:59,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 764 [2023-11-19 07:09:59,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:10:01,710 INFO L124 PetriNetUnfolderBase]: 7849/11284 cut-off events. [2023-11-19 07:10:01,715 INFO L125 PetriNetUnfolderBase]: For 11300/11306 co-relation queries the response was YES. [2023-11-19 07:10:01,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30868 conditions, 11284 events. 7849/11284 cut-off events. For 11300/11306 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 62605 event pairs, 1172 based on Foata normal form. 4/9149 useless extension candidates. Maximal degree in co-relation 25215. Up to 3672 conditions per place. [2023-11-19 07:10:01,824 INFO L140 encePairwiseOnDemand]: 749/764 looper letters, 163 selfloop transitions, 55 changer transitions 1/220 dead transitions. [2023-11-19 07:10:01,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 220 transitions, 1435 flow [2023-11-19 07:10:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:10:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:10:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4135 transitions. [2023-11-19 07:10:01,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633105114780505 [2023-11-19 07:10:01,841 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4135 transitions. [2023-11-19 07:10:01,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4135 transitions. [2023-11-19 07:10:01,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:10:01,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4135 transitions. [2023-11-19 07:10:01,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 318.0769230769231) internal successors, (4135), 13 states have internal predecessors, (4135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:01,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 764.0) internal successors, (10696), 14 states have internal predecessors, (10696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:01,944 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 764.0) internal successors, (10696), 14 states have internal predecessors, (10696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:01,944 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 470 flow. Second operand 13 states and 4135 transitions. [2023-11-19 07:10:01,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 220 transitions, 1435 flow [2023-11-19 07:10:02,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 220 transitions, 1396 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-19 07:10:02,086 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 810 flow [2023-11-19 07:10:02,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=764, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=810, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2023-11-19 07:10:02,088 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2023-11-19 07:10:02,089 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 810 flow [2023-11-19 07:10:02,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 307.55555555555554) internal successors, (2768), 9 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:02,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:10:02,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:10:02,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:10:02,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:10:02,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:10:02,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:10:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1310112380, now seen corresponding path program 1 times [2023-11-19 07:10:02,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:10:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339987175] [2023-11-19 07:10:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:10:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:10:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:10:02,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:10:02,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339987175] [2023-11-19 07:10:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339987175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:10:02,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659547612] [2023-11-19 07:10:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:10:02,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:10:02,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:10:02,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:10:02,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:10:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:02,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:10:02,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:10:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:10:02,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:10:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:10:02,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659547612] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:10:02,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:10:02,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 10 [2023-11-19 07:10:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323912233] [2023-11-19 07:10:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:10:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:10:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:10:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:10:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:10:03,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 764 [2023-11-19 07:10:03,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 810 flow. Second operand has 7 states, 7 states have (on average 311.2857142857143) internal successors, (2179), 7 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:03,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:10:03,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 764 [2023-11-19 07:10:03,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:10:06,263 INFO L124 PetriNetUnfolderBase]: 10657/15226 cut-off events. [2023-11-19 07:10:06,263 INFO L125 PetriNetUnfolderBase]: For 34483/34519 co-relation queries the response was YES. [2023-11-19 07:10:06,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50471 conditions, 15226 events. 10657/15226 cut-off events. For 34483/34519 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 85968 event pairs, 5164 based on Foata normal form. 5/12333 useless extension candidates. Maximal degree in co-relation 43011. Up to 6172 conditions per place. [2023-11-19 07:10:06,416 INFO L140 encePairwiseOnDemand]: 755/764 looper letters, 186 selfloop transitions, 22 changer transitions 7/216 dead transitions. [2023-11-19 07:10:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 216 transitions, 1864 flow [2023-11-19 07:10:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:10:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:10:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1968 transitions. [2023-11-19 07:10:06,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4293193717277487 [2023-11-19 07:10:06,425 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1968 transitions. [2023-11-19 07:10:06,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1968 transitions. [2023-11-19 07:10:06,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:10:06,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1968 transitions. [2023-11-19 07:10:06,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:06,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 764.0) internal successors, (5348), 7 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:06,449 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 764.0) internal successors, (5348), 7 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:06,449 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 810 flow. Second operand 6 states and 1968 transitions. [2023-11-19 07:10:06,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 216 transitions, 1864 flow [2023-11-19 07:10:06,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 216 transitions, 1804 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-19 07:10:06,839 INFO L231 Difference]: Finished difference. Result has 89 places, 123 transitions, 1011 flow [2023-11-19 07:10:06,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=764, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1011, PETRI_PLACES=89, PETRI_TRANSITIONS=123} [2023-11-19 07:10:06,840 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-11-19 07:10:06,840 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 123 transitions, 1011 flow [2023-11-19 07:10:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 311.2857142857143) internal successors, (2179), 7 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:06,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:10:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:10:06,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:10:07,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:10:07,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 07:10:07,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:10:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2087921084, now seen corresponding path program 3 times [2023-11-19 07:10:07,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:10:07,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267742661] [2023-11-19 07:10:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:10:07,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:10:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:10:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:10:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:10:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267742661] [2023-11-19 07:10:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267742661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:10:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993713167] [2023-11-19 07:10:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:10:07,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:10:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:10:07,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:10:07,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a8c372-d039-48b6-9dd7-91eaf50d54f9/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:10:07,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 07:10:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:10:07,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:10:07,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:10:08,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:10:08,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 77 treesize of output 74 [2023-11-19 07:10:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:10:08,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:10:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993713167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:10:08,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:10:08,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-19 07:10:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7988438] [2023-11-19 07:10:08,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:10:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:10:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:10:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:10:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:10:08,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 764 [2023-11-19 07:10:08,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 123 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 307.55555555555554) internal successors, (2768), 9 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:08,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:10:08,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 764 [2023-11-19 07:10:08,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:10:12,711 INFO L124 PetriNetUnfolderBase]: 13374/19106 cut-off events. [2023-11-19 07:10:12,711 INFO L125 PetriNetUnfolderBase]: For 44276/44304 co-relation queries the response was YES. [2023-11-19 07:10:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64420 conditions, 19106 events. 13374/19106 cut-off events. For 44276/44304 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 113209 event pairs, 2678 based on Foata normal form. 17/15563 useless extension candidates. Maximal degree in co-relation 56978. Up to 10016 conditions per place. [2023-11-19 07:10:12,882 INFO L140 encePairwiseOnDemand]: 749/764 looper letters, 188 selfloop transitions, 77 changer transitions 1/267 dead transitions. [2023-11-19 07:10:12,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 267 transitions, 2334 flow [2023-11-19 07:10:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:10:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:10:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 4130 transitions. [2023-11-19 07:10:12,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41582762786951266 [2023-11-19 07:10:12,898 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 4130 transitions. [2023-11-19 07:10:12,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 4130 transitions. [2023-11-19 07:10:12,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:10:12,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 4130 transitions. [2023-11-19 07:10:12,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 317.6923076923077) internal successors, (4130), 13 states have internal predecessors, (4130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:12,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 764.0) internal successors, (10696), 14 states have internal predecessors, (10696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:12,932 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 764.0) internal successors, (10696), 14 states have internal predecessors, (10696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:10:12,932 INFO L175 Difference]: Start difference. First operand has 89 places, 123 transitions, 1011 flow. Second operand 13 states and 4130 transitions. [2023-11-19 07:10:12,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 267 transitions, 2334 flow